WO2025197969A1 - Ionic compound, composition, functional material, silver halide photosensitive material, and diffusion-transfer-type silver halide photosensitive material - Google Patents

Abstract

Provided are: an ionic compound having an anion structure represented by formula 1; and a composition, a functional material, and a silver halide photosensitive material or a diffusion-transfer-type silver halide photosensitive material containing the ionic compound. In formula 1: w represents an integer of 1 or more; x represents an integer of 2 or more; Sil₁ represents a substituent containing at least three Si atoms, wherein a plurality of Sil₁ may be the same or different; L₁ represents a divalent linking group, wherein a plurality of L₁ may be the same or different; and R represents an (x + w)-valent organic group containing a carbon atom.

Description

Ionic compounds, compositions, functional materials, silver halide photographic materials, and diffusion transfer type silver halide photographic materials

This disclosure relates to ionic compounds, compositions, functional materials, silver halide photographic materials, and diffusion transfer type silver halide photographic materials.

In recent years, significant increases in sensitivity have been achieved in silver halide photographic materials to enhance user benefits. Furthermore, as the manufacturing, exposure, and processing processes of silver halide photographic materials become faster and more automated, they are required to be able to withstand contact with various rollers and equipment, as well as friction between materials. Photosensitive materials generally consist of an electrically insulating support and a photographic emulsion layer. Therefore, electrostatic charges are likely to accumulate during the manufacturing process and use of the materials due to contact with the surfaces of similar or different materials, friction from peeling, and other factors.
If electrostatic charges accumulate before development, the photosensitive layer is exposed to light due to the discharge of these charges, resulting in static fogging after development. The accumulated electrostatic charges can also cause problems such as dust adhesion to the photosensitive material.

Conventional silicon compounds include, for example, the silicon compounds described in Non-Patent Document 1, Non-Patent Document 2, and Patent Document 1.

Non-patent document 1: Langmuir 2019, 35, 9785-9793
Non-patent document 2: Phys. Chem. Chem. Phys., 2017, 19, 23869-23877

Patent Document 1: Japanese Patent Application Laid-Open No. 6-25420

The problem to be solved by the present disclosure is to provide a novel ionic compound.
Another problem to be solved by the present disclosure is to provide a composition, a functional material, a silver halide photographic light-sensitive material, or a diffusion transfer type silver halide photographic light-sensitive material, each containing the ionic compound.

The means for solving the above problems include the following aspects.
<1> An ionic compound having an anion structure represented by the following formula 1:

In formula 1,
w represents an integer of 1 or more;
x represents an integer of 2 or more;
Sil ₁ represents a substituent containing at least three or more Si atoms, and multiple Sil _1s may be the same or different;
L ₁ represents a divalent linking group, and multiple L ₁ may be the same or different;
R represents an (x+w)-valent organic group containing a carbon atom.

<2> The ionic compound according to <1>, which is a compound represented by formula 2.

In formula 2,
w represents an integer of 1 or more;
x represents an integer of 2 or more;
Sil ₁ represents a substituent containing at least three or more Si atoms, and multiple Sil _1s may be the same or different;
L ₁ represents a divalent linking group, and multiple L ₁ may be the same or different;
R represents an (x+w)-valent organic group containing a carbon atom;
^M1 represents a monovalent to trivalent cation;
n represents an integer of 1 to 3, which is equal to the valence of ^M1 .

<3> The ionic compound according to <1> or <2>, wherein w is 1.
<4> The ionic compound according to <1> or <2>, wherein the anion structure represented by the formula 1 is a structure represented by any one of the following formulas a-1, a-2, and a-3:

In formula a-1 to formula a-3,
Sil ₁ represents a substituent containing at least three or more Si atoms, and multiple Sil _1s may be the same or different;
L ₁ represents a divalent linking group, and multiple L ₁ may be the same or different;
L _A represents a single bond or a divalent linking group;
b represents 1 or 2;
R _B represents a hydrogen atom or a hydrocarbon group;
L _B represents a single bond or a divalent linking group, and multiple L _Bs may be the same or different;
Lc ₁ represents a single bond or a divalent linking group, and multiple Lc _1s may be the same or different;
_Lc2 represents a single bond or a divalent linking group.

<5> The ionic compound according to <1> or <2>, wherein Sil1 is a group represented by any one of the following formulae Si-1 to Si-4.

In formula Si-1 to formula Si-4,
R ₁ represents a hydrocarbon group, and multiple R ₁ may be the same or different;
y represents an integer of 2 or more;
_R2 represents a hydrocarbon group, and multiple _R2s may be the same or different;
z represents 2 or 3;
_R3 represents a hydrocarbon group, and multiple _R3s may be the same or different;
p and q represent integers satisfying p≧1, q≧1, and p+q≧3;
R ₄ , R _4a and R _4b each represent a hydrocarbon group, and a plurality of R _{4 s} , R _4a and R _4b may be the same or different;
* indicates the bonding position to _L1 .

<6> A composition comprising an ionic compound having an anionic structure represented by the following formula 1 and a binder.

In formula 1,
w represents an integer of 1 or more;
x represents an integer of 2 or more;
Sil ₁ represents a substituent containing at least three or more Si atoms, and multiple Sil _1s may be the same or different;
L ₁ represents a divalent linking group, and multiple L ₁ may be the same or different;
R represents an (x+w)-valent organic group containing a carbon atom.

<7> A functional material having a support and a layer on the support, the layer containing an ionic compound having an anionic structure represented by the following formula 1:

In formula 1,
w represents an integer of 1 or more;
x represents an integer of 2 or more;
Sil ₁ represents a substituent containing at least three or more Si atoms, and multiple Sil _1s may be the same or different;
L ₁ represents a divalent linking group, and multiple L ₁ may be the same or different;
R represents an (x+w)-valent organic group containing a carbon atom.

<8> A silver halide photographic material having a support and a layer on the support, the layer containing an ionic compound having an anionic structure represented by the following formula 1:

In formula 1,
w represents an integer of 1 or more;
x represents an integer of 2 or more;
Sil ₁ represents a substituent containing at least three or more Si atoms, and multiple Sil _1s may be the same or different;
L ₁ represents a divalent linking group, and multiple L ₁ may be the same or different;
R represents an (x+w)-valent organic group containing a carbon atom.

<9> A diffusion transfer type silver halide photographic light-sensitive material having a support and a layer on the support containing an ionic compound having an anionic structure represented by the following formula 1:

In formula 1,
w represents an integer of 1 or more;
x represents an integer of 2 or more;
Sil ₁ represents a substituent containing at least three or more Si atoms, and multiple Sil _1s may be the same or different;
L ₁ represents a divalent linking group, and multiple L ₁ may be the same or different;
R represents an (x+w)-valent organic group containing a carbon atom.

According to the present disclosure, a novel ionic compound can be provided.
Furthermore, according to the present disclosure, it is possible to provide a composition, a functional material, a silver halide photographic light-sensitive material, or a diffusion transfer type silver halide photographic light-sensitive material, each containing the ionic compound.

The present disclosure will be described in detail below. The following description of the components may be based on representative embodiments of the present disclosure, but the present disclosure is not limited to such embodiments.
In this specification, the use of "to" to indicate a range of values means that the values before and after it are included as the lower and upper limits.
In the numerical ranges described in stages in this disclosure, the upper or lower limit value described in one numerical range may be replaced with the upper or lower limit value of another numerical range described in stages. Furthermore, in the numerical ranges described in this disclosure, the upper or lower limit value of that numerical range may be replaced with a value shown in the examples.
Furthermore, in the description of groups (atomic groups) in this specification, when a notation does not specify whether the group is substituted or unsubstituted, it encompasses both unsubstituted and substituted groups. For example, the term "alkyl group" encompasses not only alkyl groups without a substituent (unsubstituted alkyl groups) but also alkyl groups with a substituent (substituted alkyl groups).
In this specification, "(meth)acrylic" is a term used as a concept that includes both acrylic and methacrylic, and "(meth)acryloyl" is a term used as a concept that includes both acryloyl and methacryloyl.
Furthermore, the term "step" in this specification includes not only an independent step but also a step that cannot be clearly distinguished from other steps, as long as the intended purpose of the step is achieved. Furthermore, in this disclosure, "mass %" and "weight %" are synonymous, and "parts by mass" and "parts by weight" are synonymous.
Furthermore, in the present disclosure, a combination of two or more preferred aspects is a more preferred aspect.
Furthermore, the weight average molecular weight (Mw) and number average molecular weight (Mn) in the present disclosure are values measured by gel permeation chromatography (GPC) unless otherwise specified.
The GPC measurement was performed using an HLC (registered trademark)-8020GPC (manufactured by Tosoh Corporation) as the measuring device, three TSKgel (registered trademark) Super Multipore HZ-H columns (4.6 mm ID x 15 cm, manufactured by Tosoh Corporation) as the columns, and THF (tetrahydrofuran) as the eluent. The measurement conditions were a sample concentration of 0.45% by mass, a flow rate of 0.35 ml/min, a sample injection amount of 10 μL, and a measurement temperature of 40°C, and the measurement was performed using a refractive index (RI) detector.
The calibration curve is prepared from eight samples of "Standard Sample TSK Standard, Polystyrene" from Tosoh Corporation: "F-40", "F-20", "F-4", "F-1", "A-5000", "A-2500", "A-1000", and "n-propylbenzene".
In the present disclosure, the term "total solid content" refers to the total mass of the components excluding the solvent from the entire composition. As described above, the term "solid content" refers to the components excluding the solvent, and may be, for example, solid or liquid at 25°C.
The present disclosure will be described in detail below.

(ionic compounds)
The ionic compound according to the present disclosure is an ionic compound having an anionic structure represented by the following formula 1:

In formula 1,
w represents an integer of 1 or more;
x represents an integer of 2 or more;
Sil ₁ represents a substituent containing at least three or more Si atoms, and multiple Sil _1s may be the same or different;
L ₁ represents a divalent linking group, and multiple L ₁ may be the same or different;
R represents an (x+w)-valent organic group containing a carbon atom.

The ionic compound according to the present disclosure is a novel compound having a specific branched structure represented by the above formula 1 and an anionic structure having a sulfonate group.
Furthermore, when the ionic compound according to the present disclosure is used for forming a film or layer, the coated surface condition is also excellent.

In formula 1, w is preferably an integer of 1 to 8, more preferably an integer of 1 to 4, even more preferably 1 or 2, and particularly preferably 1, from the viewpoints of water solubility and surfactant ability.
In terms of water solubility and surfactant activity, x in formula 1 is preferably an integer of 2 to 8, more preferably an integer of 2 to 4, even more preferably 2 or 3, and particularly preferably 2.

The number of Si atoms in Sil ₁ in Formula 1 is preferably an integer of 3 to 20, more preferably an integer of 3 to 12, still more preferably an integer of 3 to 10, and particularly preferably an integer of 4 to 7, from the viewpoints of water solubility and surfactant ability.
The above Sil ₁ is preferably bonded to L ₁ via a Si atom.
The substituent on the Si atom in the above Sil ₁ is not particularly limited, but from the viewpoints of water solubility and surfactant activity, it is preferably a hydrocarbon group or an alkoxy group other than a silyl group or a siloxy group, and more preferably a hydrocarbon group.
From the viewpoints of water solubility and surfactant activity, the hydrocarbon group is preferably an alkyl group having 1 to 6 carbon atoms (also referred to as "number of carbon atoms"), more preferably a methyl group, an ethyl group, or a branched alkyl group having 3 to 6 carbon atoms, still more preferably a t-butyl group or a methyl group, and particularly preferably a methyl group.
In addition, it is preferable that a plurality of Sil ₁ 's are the same group.

From the viewpoints of water solubility and surface activity, the above Sil ₁ is preferably a group represented by any one of the following formulae Si-1 to Si-4, and more preferably a group represented by the following formulae Si-3 or Si-4.

In formula Si-1 to formula Si-4,
R ₁ represents a hydrocarbon group, and multiple R ₁ may be the same or different;
y represents an integer of 2 or more;
_R2 represents a hydrocarbon group, and multiple _R2s may be the same or different;
z represents 2 or 3;
_R3 represents a hydrocarbon group, and multiple _R3s may be the same or different;
p and q represent integers satisfying p≧1, q≧1, and p+q≧3;
R ₄ , R _4a and R _4b each represent a hydrocarbon group, and a plurality of R _{4 s} , R _4a and R _4b may be the same or different;
* indicates the bonding position to _L1 .

From the viewpoints of water solubility and surfactant activity, the hydrocarbon group for R ₁ to R ₄ , R _4a , and R _4b is preferably an alkyl group having 1 to 6 carbon atoms, more preferably a methyl group, an ethyl group, or a branched alkyl group having 3 to 6 carbon atoms, still more preferably a t-butyl group or a methyl group, and particularly preferably a methyl group.
Furthermore, it is preferable that the plurality of R ₁ to R ₄ are the same group.
Furthermore, when a plurality of R _4a or R _4b are present, they are preferably the same group.
In formula Si-2, y is preferably an integer of 2 to 50, more preferably an integer of 2 to 20, even more preferably an integer of 2 to 10, and particularly preferably 2.
In view of water solubility and surfactant activity, z in formula Si-3 is preferably 2.
In the formula Si-4, p is preferably 1 or 2 from the viewpoints of water solubility and surfactant ability.
In the formula Si-4, q is preferably 1 or 2 from the viewpoints of water solubility and surfactant ability.
Moreover, from the viewpoint of water solubility and surfactant activity, the above p and q are preferably integers that satisfy p+q=3 or p+q=4.

From the viewpoints of water solubility and surfactant activity, _L1 in Formula 1 is preferably an alkylene group or a group in which an alkylene group is bonded to a polyalkyleneoxy group, more preferably an alkylene group or a group in which an alkylene group is bonded to a polyethyleneoxy group, and particularly preferably an alkylene group.
The alkylene group is more preferably an alkylene group having 2 to 10 carbon atoms, even more preferably an alkylene group having 2 to 4 carbon atoms, and particularly preferably an alkylene group having 2 or 3 carbon atoms.
In addition, it is preferable that a plurality of L _1s are the same group.

The number of carbon atoms in R in Formula 1 is preferably 2 to 20, more preferably 3 to 15, even more preferably 4 to 10, and particularly preferably 4 to 6, from the viewpoints of water solubility and surfactant ability.
Furthermore, from the viewpoints of water solubility and surfactant activity, R in Formula 1 is preferably a group having an oxygen atom, more preferably a group having at least one bond selected from the group consisting of an ester bond and an ether bond, still more preferably a group having two or more of at least one bond selected from the group consisting of an ester bond and an ether bond, and particularly preferably a group having 2 to 12 of at least one bond selected from the group consisting of an ester bond and an ether bond.
Furthermore, from the viewpoint of water solubility and surfactant activity, R in formula 1 is preferably a group shown below.

In the above groups, # represents the bonding position to _L1 , and ## represents the bonding position to SO ₃ ^— .

From the standpoint of water solubility and surfactant activity, the anion structure represented by the above formula 1 is preferably a structure represented by any of the following formulas a-1, a-2, or a-3, more preferably a structure represented by the following formula a-1 or a-2, and particularly preferably a structure represented by the following formula a-1.

In formula a-1 to formula a-3,
Sil ₁ represents a substituent containing at least three or more Si atoms, and multiple Sil _1s may be the same or different;
L ₁ represents a divalent linking group, and multiple L ₁ may be the same or different;
L _A represents a single bond or a divalent linking group;
b represents 1 or 2;
R _B represents a hydrogen atom or a hydrocarbon group;
L _B represents a single bond or a divalent linking group, and multiple L _Bs may be the same or different;
Lc ₁ represents a single bond or a divalent linking group, and multiple Lc _1s may be the same or different;
_Lc2 represents a single bond or a divalent linking group.

Sil ₁ and L ₁ in formulae a-1 to a-3 have the same meanings as Sil ₁ and L ₁ in formula 1, respectively, and preferred embodiments are also the same.
L _{1 A} in formula a-1 is preferably a single bond or an alkylene group, more preferably a single bond or a methylene group, and particularly preferably a single bond.
In the formula a-1, b is preferably 1 from the viewpoints of water solubility and surfactant ability.
In formula a-2, R 1 _B is preferably a hydrogen atom or an alkyl group, more preferably a hydrogen atom, a methyl group or an ethyl group, and particularly preferably a hydrogen atom.
In formula a-2, L 1 _B each independently represents preferably a single bond or an alkylene group, more preferably a single bond or a methylene group.
In formula a-3, each L _c1 is preferably independently a single bond or an alkylene group, and more preferably a single bond.
L _c2 in formula a-3 is preferably a single bond or an alkylene group, more preferably a single bond.

The ionic compounds according to the present disclosure have a counter cation.
The counter cation may be either a metal cation or an organic cation such as ammonium, but is preferably a metal cation, more preferably a divalent or monovalent metal cation, still more preferably a monovalent metal cation, and particularly preferably Na ⁺ or K ⁺ .
The counter cation is preferably an alkali metal ion, an alkaline earth metal ion, Al ³⁺ , Fe ²⁺ , Fe ³⁺ or a primary to quaternary ammonium cation, more preferably an alkali metal ion or an alkaline earth metal ion, and particularly preferably an alkali metal ion.
Examples of alkali metals include lithium (Li), sodium (Na), potassium (K), and cesium (Cs).
Examples of alkaline earth metals include calcium (Ca), strontium (Sr), and barium (Ba).

In terms of water solubility and surfactant activity, the ionic compound according to the present disclosure is preferably a compound represented by Formula 2.

In formula 2,
w represents an integer of 1 or more;
x represents an integer of 2 or more;
Sil ₁ represents a substituent containing at least three or more Si atoms, and multiple Sil _1s may be the same or different;
L ₁ represents a divalent linking group, and multiple L ₁ may be the same or different;
R represents an (x+w)-valent organic group containing a carbon atom;
^M1 represents a monovalent to trivalent cation;
n represents an integer of 1 to 3, which is equal to the valence of ^M1 .

In formula 2, w, x, Sil ₁ , L ₁ and R have the same meanings as w, x, Sil ₁ , L ₁ and R in formula 1, respectively, and preferred embodiments are also the same.
M ¹ in formula 2 is preferably a monovalent to trivalent metal cation or a primary to quaternary ammonium cation, more preferably a divalent or monovalent metal cation, even more preferably a monovalent metal cation, and particularly preferably Na ⁺ or K ⁺ .
In formula 2, n is preferably 1 or 2, and more preferably 1.

Preferred specific examples of the anion structure represented by formula 1 include the following A1-1 to A1-14, A2-1 to A2-8, A3-1, A3-2, and A4-1, where Me represents a methyl group.
Suitable specific examples of ionic compounds according to the present disclosure include compounds having any of the anionic structures A1-1 to A1-14, A2-1 to A2-8, A3-1, A3-2, and A4-1 below, and Na ⁺ , K ⁺ , Cs ⁺ , Mg ²⁺ , Fe ³⁺ , or tetramethylammonium as a counter cation.
In the following description, for example, the sodium salt of A1-1 may be referred to as A1-1Na.

<Application>
The ionic compound according to the present disclosure is not particularly limited in its use, but can be suitably used as a leveling agent or surfactant.
Furthermore, the ionic compounds according to the present disclosure can be suitably used in known applications that use leveling agents or surfactants.
Furthermore, the ionic compounds according to the present disclosure can be suitably used for film formation.
In addition, the ionic compound according to the present disclosure can be suitably used in photosensitive materials, surface modifiers, compositions for forming protective layers, compositions for forming conductive layers, compositions for forming undercoat layers, pressure-responsive materials, heat-responsive materials, microcapsules, microgels, and the like.
In particular, the ionic compound according to the present disclosure can be suitably used in silver halide photographic light-sensitive materials and diffusion transfer type silver halide photographic light-sensitive materials.

(composition)
The composition according to the present disclosure includes an ionic compound having an anionic structure represented by the following formula 1 (ionic compound according to the present disclosure) and a binder.

In formula 1,
w represents an integer of 1 or more;
x represents an integer of 2 or more;
Sil ₁ represents a substituent containing at least three or more Si atoms, and multiple Sil _1s may be the same or different;
L ₁ represents a divalent linking group, and multiple L ₁ may be the same or different;
R represents an (x+w)-valent organic group containing a carbon atom.

Preferred aspects of the ionic compound in the composition according to the present disclosure are the same as the preferred aspects of the ionic compound according to the present disclosure described above.
The composition according to the present disclosure may contain one type of ionic compound according to the present disclosure alone, or may contain two or more types of ionic compounds according to the present disclosure.
The content of the ionic compound according to the present disclosure in the composition according to the present disclosure may be selected appropriately depending on the application, but is preferably 0.0001% by mass to 50% by mass, more preferably 0.001% by mass to 20% by mass, and particularly preferably 0.01% by mass to 10% by mass, relative to the total solid content of the composition.

<Binder>
The composition according to the present disclosure includes a binder.
The binder is not particularly limited and may be appropriately selected depending on the application. Known binder polymers and known monomers (polymerizable compounds) can be used.

Binder polymers include, for example, epoxy resin, diallyl phthalate resin, silicone resin, phenolic resin, unsaturated polyester resin, polyimide resin, polyurethane resin, melamine resin, urea resin, ionomer resin, ethylene ethyl acrylate resin, acrylonitrile acrylate styrene copolymer resin, acrylonitrile styrene resin, acrylonitrile chlorinated polyethylene styrene copolymer resin, ethylene vinyl acetate resin, ethylene vinyl alcohol copolymer resin, acrylonitrile butadiene styrene copolymer resin, vinyl chloride resin, chlorinated polyethylene resin, polyvinylidene chloride resin, cellulose acetate resin, fluororesin, polyoxymethylene resin, polyamide resin, poly Examples of such resins include arylate resins, thermoplastic polyurethane elastomers, polyether ether ketone resins, polyether sulfone resins, polyethylene, polypropylene, polycarbonate resins, polystyrene, polystyrene-maleic acid copolymer resins, polystyrene-acrylic acid copolymer resins, polyphenylene ether resins, polyphenylene sulfide resins, polybutadiene resins, polybutylene terephthalate resins, acrylic resins, methacrylic resins, methylpentene resins, polylactic acid, polybutylene succinate resins, butyral resins, formal resins, polyvinyl alcohol, polyvinylpyrrolidone, ethyl cellulose, carboxymethyl cellulose, gelatin, and copolymer resins thereof.

Examples of the polymerizable compound (monomer) include (meth)acrylic monomers, epoxy monomers, oxetanyl monomers, and vinyl monomers.
The (meth)acrylic monomer is not particularly limited, and examples thereof include known (meth)acrylate compounds, (meth)acrylamide compounds, (meth)acrylic acid, and (meth)acrylonitrile.
Specific examples include alkyl (meth)acrylates such as methyl (meth)acrylate, ethyl (meth)acrylate, isopropyl (meth)acrylate, n-propyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, t-butyl (meth)acrylate, hexyl (meth)acrylate, and ethylhexyl (meth)acrylate; hydroxyalkyl (meth)acrylates such as hydroxymethyl (meth)acrylate, 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, hydroxypentyl (meth)acrylate, and hydroxyhexyl (meth)acrylate; dimethylaminoethyl (meth)acrylate, diethylamino Alkylaminoalkyl (meth)acrylates such as ethyl (meth)acrylate and t-butylaminoethyl (meth)acrylate; aromatic ring-containing (meth)acrylates such as benzyl (meth)acrylate and phenoxyethyl (meth)acrylate; styrenes such as styrene, α-methylstyrene and chlorostyrene, cyclopropyl (meth)acrylate, cyclobutyl (meth)acrylate, cyclopentyl (meth)acrylate, cyclohexyl (meth)acrylate, cycloheptyl (meth)acrylate, cyclooctyl (meth)acrylate, cyclononyl (meth)acrylate, cyclodecyl (meth)acrylate, isobornyl (meth)acrylate, norbornyl (meth)acrylate, adamantyl (meth)acrylate, dicyclopentanyl Alicyclic (meth)acrylates such as (meth)acrylate and dicyclopentenyloxyethyl (meth)acrylate; N-hydroxyalkyl (meth)acrylamides such as N-hydroxymethyl (meth)acrylamide, N-hydroxyethyl (meth)acrylamide and N-hydroxybutyl (meth)acrylamide; N-alkoxyalkyl (meth)acrylamides such as N-methoxymethyl (meth)acrylamide, N-ethoxymethyl (meth)acrylamide, N-(n-,iso)butoxymethyl (meth)acrylamide, N-methoxyethyl (meth)acrylamide, N-ethoxyethyl (meth)acrylamide and N-(n-,iso)butoxyethyl (meth)acrylamide; (meth)acrylonitrile, tricyclodecane dimethanol di(meth)acrylamide; acrylate, tricyclodecane dimenanol di(meth)acrylate, 1,9-nonanediol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, trimethylolpropane triacrylate, trimethylolpropane PO (propylene oxide)-modified triacrylate, trimethylolpropane EO (ethylene oxide)-modified triacrylate, trimethylolpropane trimethacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, pentaerythritol tetramethacrylate, dipentaerythritol pentaacrylate, dipentaerythritol pentamethacrylate, dipentaerythritol hexaacrylate, and dipentaerythritol hexamethacrylate.

Examples of epoxy group-containing monomers that are epoxy-based monomers include bisphenol A type epoxy resins, bisphenol F type epoxy resins, brominated bisphenol A type epoxy resins, bisphenol S type epoxy resins, diphenyl ether type epoxy resins, hydroquinone type epoxy resins, naphthalene type epoxy resins, biphenyl type epoxy resins, fluorene type epoxy resins, phenol novolac type epoxy resins, orthocresol novolac type epoxy resins, trishydroxyphenylmethane type epoxy resins, trifunctional type epoxy resins, tetraphenylolethane type epoxy resins, dicyclopentadiene phenol type epoxy resins, hydrogenated bisphenol A type epoxy resins, bisphenol A nucleus-containing polyol type epoxy resins, polypropylene glycol type epoxy resins, glycidyl ester type epoxy resins, glycidyl amine type epoxy resins, glyoxal type epoxy resins, alicyclic type epoxy resins, and heterocyclic type epoxy resins.

The composition according to the present disclosure may contain one type of binder alone, or may contain two or more types of binders.
The content of the binder in the composition according to the present disclosure may be appropriately selected depending on the application, but is preferably 1% by mass to 99% by mass, more preferably 5% by mass to 90% by mass, and particularly preferably 10% by mass to 80% by mass, relative to the total solid content of the composition.
Furthermore, when the composition according to the present disclosure contains other additives other than the binder, as described below, the binder should be contained in a proportion sufficient to form the desired functional film. In this case, the binder content is preferably 0.5% by mass to 98% by mass, more preferably 2% by mass to 60% by mass, and may be 2% by mass to 50% by mass, based on the total solid content of the composition.

<Polymerization initiator>
The composition according to the present disclosure may also include a polymerization initiator.
In particular, when the polymerizable compound is contained, it is preferable to contain a polymerization initiator.
Examples of the polymerization initiator include a photopolymerization initiator and a thermal polymerization initiator.
Examples of the photopolymerization initiator include a photoradical polymerization initiator and a photocationic polymerization initiator.

Examples of the photopolymerization initiator include halogenated hydrocarbon derivatives (e.g., compounds having a triazine skeleton, compounds having an oxadiazole skeleton, etc.), acylphosphine compounds, hexaarylbiimidazole, oxime compounds, organic peroxides, thio compounds, ketone compounds, aromatic onium salts, α-hydroxyketone compounds, and α-aminoketone compounds.
Examples of the thermal polymerization initiator include diazo compounds, peroxides, and onium salt compounds.

The composition according to the present disclosure may contain one type of polymerization initiator alone, or may contain two or more types of polymerization initiators.
The content of the polymerization initiator in the composition according to the present disclosure may be appropriately selected depending on the application, but is preferably 0.1% by mass to 30% by mass, more preferably 0.5% by mass to 25% by mass, and particularly preferably 1% by mass to 20% by mass, relative to the total solid content of the composition.

<Curing agent>
The compositions according to the present disclosure may also include a curing agent.
For example, curing agents for resins having hydroxyl groups include polyisocyanates, partial condensates and polymers of isocyanate compounds, adducts with polyhydric alcohols, low-molecular-weight polyester coatings, blocked polyisocyanate compounds in which the isocyanate group is blocked with a blocking agent such as phenol, melamine resins, urea resins, polybasic acids or their anhydrides, etc. Furthermore, for example, curing agents for resins having epoxy groups include aliphatic polyamines, aromatic polyamines, polyamidoamines, modified polyamines, polymercaptans, acid anhydrides, phenol resols, phenol novolacs, etc.

<Solvent>
The composition according to the present disclosure may contain a solvent from the viewpoint of coatability and the like.
Examples of the solvent include water, organic solvents, and mixed solvents of water and organic solvents.

As the water, distilled water, ion-exchanged water, etc. can be used.
The organic solvent can be appropriately selected depending on the use or purpose of the liquid composition, etc. Examples of the organic solvent include esters, ethers, ketones, aromatic hydrocarbons, and alcohols.

Examples of esters include ethyl acetate, n-butyl acetate, isobutyl acetate, amyl formate, isoamyl acetate, isobutyl acetate, butyl propionate, isopropyl butyrate, ethyl butyrate, butyl butyrate, methyl lactate, ethyl lactate, alkyl oxyacetate solvents (e.g., methyl oxyacetate, ethyl oxyacetate, butyl oxyacetate (specifically, methyl methoxyacetate, ethyl methoxyacetate, butyl methoxyacetate, methyl ethoxyacetate, ethyl ethoxyacetate, etc.)), alkyl 3-oxypropionate solvents (e.g., methyl 3-oxypropionate, ethyl 3-oxypropionate (specifically, methyl 3-methoxypropionate, ethyl 3-methoxypropionate, methyl 3-ethoxypropionate, ethyl 3-ethoxypropionate, etc.)), and alkyl 2-oxypropionate solvents (e.g., 2-oxypropionate). Examples include methyl propionate, ethyl 2-oxypropionate, propyl 2-oxypropionate (specifically, methyl 2-methoxypropionate, ethyl 2-methoxypropionate, propyl 2-methoxypropionate, methyl 2-ethoxypropionate, ethyl 2-ethoxypropionate, etc.), 2-oxy-2-methylpropionic acid alkyl ester solvents (methyl 2-oxy-2-methylpropionate, ethyl 2-oxy-2-methylpropionate (specifically, methyl 2-methoxy-2-methylpropionate, ethyl 2-ethoxy-2-methylpropionate, etc.)), methyl pyruvate, ethyl pyruvate, propyl pyruvate, methyl acetoacetate, ethyl acetoacetate, methyl 2-oxobutanoate, ethyl 2-oxobutanoate, cyclohexyl acetate, and 1-methyl-2-methoxyethyl propionate.

Examples of ethers include diethylene glycol dimethyl ether, tetrahydrofuran, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, methyl cellosolve acetate, ethyl cellosolve acetate, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate (also referred to as PEGMEA), diethylene glycol monoethyl ether acetate (also referred to as ethyl carbitol acetate), diethylene glycol monobutyl ether acetate (also referred to as butyl carbitol acetate), propylene glycol monoethyl ether acetate, and propylene glycol monopropyl ether acetate.
Examples of ketones include acetone, methyl ethyl ketone, cyclohexanone, 2-heptanone, and 3-heptanone.
Examples of aromatic hydrocarbons include toluene and xylene.

Examples of alcohols include monohydric alcohols (e.g., methanol, ethanol, propanol, isopropanol, butanol, isobutanol, sec-butanol, t-butanol, pentanol, hexanol, cyclohexanol, and benzyl alcohol), polyhydric alcohols (e.g., ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, polypropylene glycol, butylene glycol, hexanediol, pentanediol, glycerin, hexanetriol, and thiodiglycol), and glycol derivatives (e.g., ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol monobutyl ether, dipropylene glycol monomethyl ether, triethylene glycol monomethyl ether, ethylene glycol diacetate, ethylene glycol monomethyl ether acetate, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, triethylene glycol monobutyl ether, and ethylene glycol monophenyl ether).

As the solvent, from the viewpoint of further exerting leveling properties or surfactant effects, at least one solvent selected from the group consisting of water and water-soluble solvents is preferred.
Examples of the water-soluble solvent include, in addition to the substances exemplified as the alcohols above, amines (e.g., ethanolamine, diethanolamine, triethanolamine, N-methyldiethanolamine, N-ethyldiethanolamine, morpholine, N-ethylmorpholine, ethylenediamine, diethylenetriamine, triethylenetetramine, polyethyleneimine, tetramethylpropylenediamine), other polar solvents (e.g., formamide, N,N-dimethylformamide, N,N-dimethylacetamide, dimethyl sulfoxide, sulfolane, 2-pyrrolidone, N-methyl-2-pyrrolidone, N-vinyl-2-pyrrolidone, 2-oxazolidone, 1,3-dimethyl-2-imidazolidinone, acetonitrile, acetone), and the like.

The composition according to the present disclosure may contain one solvent alone, or two or more solvents.
The content of the solvent in the composition according to the present disclosure may be appropriately selected depending on the intended use.

<Other additives>
In addition to the components described above, the composition according to the present disclosure may contain known additives depending on the intended use.
Examples of other additives include known additives such as colorants, surfactants other than the ionic compounds according to the present disclosure, leveling agents other than the ionic compounds according to the present disclosure, fillers, anti-fading agents, emulsion stabilizers, penetration enhancers, ultraviolet absorbers, preservatives, antifungal agents, pH adjusters, viscosity adjusters, dispersion stabilizers, rust inhibitors, and chelating agents.

(Functional material)
The functional material according to the present disclosure has a support and a layer on the support, the layer containing an ionic compound having an anionic structure represented by the following formula 1 (the ionic compound according to the present disclosure):

In formula 1,
w represents an integer of 1 or more;
x represents an integer of 2 or more;
Sil ₁ represents a substituent containing at least three or more Si atoms, and multiple Sil _1s may be the same or different;
L ₁ represents a divalent linking group, and multiple L ₁ may be the same or different;
R represents an (x+w)-valent organic group containing a carbon atom.

The functional material according to the present disclosure is not particularly limited as long as it has a layer containing an ionic compound according to the present disclosure on a support, but suitable examples include photosensitive materials, materials having a protective layer, materials having a conductive layer, materials having an undercoat layer, pressure-responsive materials, and heat-responsive materials.
Among these, silver halide photographic light-sensitive materials and diffusion transfer type silver halide photographic light-sensitive materials, which will be described later, are particularly suitable.

<Layer containing an ionic compound according to the present disclosure>
Preferred aspects of the ionic compound in the functional material according to the present disclosure are the same as the preferred aspects of the ionic compound according to the present disclosure described above.
The functional material according to the present disclosure may contain one type of ionic compound according to the present disclosure alone, or may contain two or more types of ionic compounds according to the present disclosure.
The layer containing the ionic compound according to the present disclosure may be a single layer or multiple layers. When the functional material is composed of multiple layers, these layers may be formed sequentially or simultaneously by multilayer coating or the like.
The content of the ionic compound according to the present disclosure in the layer of the functional material according to the present disclosure may be selected appropriately depending on the application, but is preferably 0.0001% by mass to 50% by mass, more preferably 0.001% by mass to 20% by mass, and particularly preferably 0.01% by mass to 10% by mass, relative to the total mass of the layer.

The layer may contain known components depending on the intended use. For example, the layer may contain the above-mentioned binder or the above-mentioned polymerization initiator, or may contain a colorant, a surfactant other than the ionic compound according to the present disclosure, a leveling agent other than the ionic compound according to the present disclosure, a filler, an anti-fading agent, an emulsion stabilizer, a penetration enhancer, an ultraviolet absorber, an antiseptic, an antifungal agent, a pH adjuster, a viscosity adjuster, a dispersion stabilizer, a rust inhibitor, a chelating agent, or the like.
Furthermore, the composition may contain various components contained in silver halide photographic light-sensitive materials or diffusion transfer type silver halide photographic light-sensitive materials, which will be described later.

The average thickness of the layer is not particularly limited and may be selected depending on the application, but is preferably 0.01 μm to 1 mm, and more preferably 0.1 μm to 200 μm.
In the present disclosure, the average thickness is measured as follows.
The sample is cut in a plane parallel to the thickness direction, and the thickness is measured at five or more points on the cross section, and the average value of these measurements is taken as the average thickness.
The ionic compound according to the present disclosure can particularly exhibit the effects of preventing cissing and improving surface condition when the outermost layer of the functional material contains a matting agent having a thickness greater than the average thickness of the layer. Specifically, the ratio (D/d) of the particle size D of the matting agent to the average thickness d is preferably 1.5 to 60, more preferably 5 to 50, and even more preferably 10 to 50. The content of the matting agent varies depending on the desired surface shape, but is preferably 10 mg/m ² to 800 mg/m ² , more preferably 20 mg/m ² to 600 mg/m ² , and even more preferably 30 mg/m ² to 500 mg/m ^2. In this case, the binder is preferably a water-soluble colloid, such as gelatin, carboxymethyl cellulose, or polyvinyl alcohol.

<Usable silicone surfactants>
The functional material according to the present disclosure can use the silicone surfactants shown below. The silicone surfactant refers to a surfactant having a polysiloxane structure, and may have a functional group such as a hydrophilic group, a hydrophilic polymer chain, or the like, at a side chain, end, or the like, such as a polyether-modified group, a polyether-alkyl co-modified group, a polyglycerin-modified group, or a polyglycerin-alkyl co-modified group. More specifically, it is preferable to include a silicone surfactant represented by the following general formula (1):

In formula (1), m is an integer of 1 or more and 200 or less, preferably an integer of 2 or more and 100 or less, and more preferably an integer of 5 or more and 50 or less, and n is an integer of 1 or more and 100 or less, preferably an integer of 2 or more and 80 or less, and more preferably an integer of 4 or more and 50 or less. In formula (1), a is an integer of 0 or more and 40 or less, preferably an integer of 35 or less, more preferably an integer of 25 or less, and even more preferably an integer of 15 or less, and b is an integer of 0 or more and 40 or less, preferably an integer of 2 or more and 35 or less, more preferably an integer of 4 or more and 25 or less, and even more preferably an integer of 6 or more and 20 or less.
(a+b) is preferably 1 or more and 50 or less, more preferably 2 or more and 40 or less, and even more preferably 5 or more and 30 or less. Each of the structural units m, n, a, and b may be a block copolymer or a random copolymer.

From the viewpoint of drying properties of the coating composition, the ratio of m to n (m/n) is preferably 1.5 or more and 20 or less, more preferably 1.8 or more and 15 or less, and even more preferably 2.0 or more and 10 or less. The ratio (m/n) is calculated from the ratio of modified Si element to unmodified Si element by proton nuclear magnetic resonance ( ¹ H-NMR) spectroscopy.
From the viewpoint of improving the wetting and spreading properties of the coating composition, the ratio [(a+b)/(m/n)] is preferably 1.6 or more and 6.3 or less, more preferably 1.7 or more and 5.5 or less, and even more preferably 1.8 or more and 5.0 or less.

In general formula (1), R represents a hydrogen atom or an alkyl group, preferably a hydrogen atom or an alkyl group having 1 to 15 carbon atoms, more preferably a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, even more preferably a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and even more preferably a methyl group.

Examples of polyether-modified silicone surfactants represented by general formula (1) include PEG-3 dimethicone, PEG-9 dimethicone, PEG-9PEG-9 dimethicone, PEG-9 methyl ether dimethicone, PEG-10 dimethicone, PEG-11 methyl ether dimethicone, PEG/PPG-20/22 butyl ether dimethicone, PEG-32 methyl ether dimethicone, PEG-9 polydimethylsiloxyethyl dimethicone, lauryl PEG-9 polydimethylsiloxyethyl dimethicone, dimethicone/(PEG-10/15) crosspolymer, and (PEG-15/lauryl polydimethylsiloxyethyl dimethicone) crosspolymer.

Commercially available silicone surfactants include, for example, BYK-302, BYK-306, BYK-307, BYK-326, BYK-333, BYK-341, BYK-345, BYK-346, BYK-347, BYK-348, BYK-379, BYK-3451, BYK-3565, BYK-UV3530 (all trade names, manufactured by BYK Japan Co., Ltd.), KF-351A, KF-352A, KF -353, KF-354L, KF-355A, KF-615A, KF-618, KF-642, KF-643, KF-945, KF-640, KF-642, KF-643, KF-6020, X-22- 4515, KF-6011, KF-6012, KF-6013, KF-6015, KF-6017, KF-6028, KF-6038, KF-6043, KP-101, KP-104, KP-105, KP -106, KP-109, KP-110, KP-112, KP-118, KP-120, KP-121, KP-124, KP-125, KP-341 (all trade names, manufactured by Shin-Etsu Chemical Co., Ltd.), SAG503A, SAG014 (all trade names, manufactured by Nissin Chemical Industry Co., Ltd.), TEGO WET240, TEGO WET270 (all trade names, manufactured by Evonik), EMALEX-SS-5602, SS-1906EX ( Examples include FZ-2105, FZ-2118, FZ-2154, FZ-2161, FZ-2162, FZ-2163, FZ-2164 (all trade names, Toray Dow Corning Silicone Co., Ltd.), BYK-33, BYK-387 (all trade names, BYK-Chemie Co., Ltd.), TSF4440, TSF4452, TSF4453 (all trade names, Toshiba Silicon Co., Ltd.), etc.

<Support>
The functional material according to the present disclosure has a support.
Examples of the support include a metal plate, a glass plate, a resin plate, a resin film, a paper support, a metal foil, etc. The support may also be a laminate having various functional layers.
The support may also be surface-treated.
The average thickness of the support is not particularly limited, but is preferably from 0.1 μm to 10 cm, and more preferably from 1 μm to 1 mm.

<Other demographics>
The functional material according to the present disclosure may have other layers between the support and the above layer, or on the side of the support opposite to the side having the above layer, depending on the application.
The other layers are not particularly limited, and include known layers for known applications.

(Silver halide photographic materials)
The silver halide photographic light-sensitive material according to the present disclosure has a support and a layer containing an ionic compound having an anionic structure represented by the following formula 1 (ionic compound according to the present disclosure).

In formula 1,
w represents an integer of 1 or more;
x represents an integer of 2 or more;
Sil ₁ represents a substituent containing at least three or more Si atoms, and multiple Sil _1s may be the same or different;
L ₁ represents a divalent linking group, and multiple L ₁ may be the same or different;
R represents an (x+w)-valent organic group containing a carbon atom.

The silver halide photographic material is preferably a material that is sensitive to light, laser, or X-ray irradiation, and is suitably selected from, for example, black-and-white reversal film, black-and-white negative film, color reversal film, color negative film, film in which a photosensitive photographic component has been digitally scanned, black-and-white reversal paper, black-and-white paper, color paper, color reversal paper, paper in which a photosensitive photographic component has been exposed by laser irradiation from a digital database, and photosensitive material that has been developed by heat.

Preferred embodiments of the ionic compound in the silver halide photographic light-sensitive material according to the present disclosure are the same as the preferred embodiments of the ionic compound according to the present disclosure described above.
The silver halide photographic light-sensitive material according to the present disclosure may contain one type of ionic compound according to the present disclosure alone, or two or more types.
The content of the ionic compound according to the present disclosure in the layer of the silver halide photographic light-sensitive material according to the present disclosure may be appropriately selected depending on the application, but is preferably 0.0001% by mass to 50% by mass, more preferably 0.001% by mass to 20% by mass, and particularly preferably 0.01% by mass to 10% by mass, relative to the total mass of the layer.

The layer may be any layer constituting the silver halide photographic light-sensitive material described below. When a layer is formed by coating, it is preferably the outermost layer during coating. When multiple layers are laminated sequentially, it is preferably used as the outermost layer during each sequential coating.
Furthermore, in the silver halide photographic light-sensitive material according to the present disclosure, the layer containing the ionic compound according to the present disclosure may be one layer or two or more layers.
The above layer may contain various components contained in silver halide photographic light-sensitive materials, which will be described later.

In the present disclosure, when an ionic compound according to the present disclosure is used in a layer of a photographic light-sensitive material, the aqueous coating composition containing the ionic compound according to the present disclosure may consist solely of the ionic compound according to the present disclosure and water, or may contain other components as appropriate depending on the purpose.

In the aqueous coating composition, the ionic compound according to the present disclosure may be used alone or in combination of two or more.
Additionally, a surfactant other than the ionic compound according to the present disclosure may be used together with the ionic compound according to the present disclosure.
Usable surfactants include various anionic, cationic, and nonionic surfactants, and may be polymeric surfactants or silicone surfactants other than the ionic compounds according to the present disclosure. Among these, anionic or nonionic surfactants are more preferred. Specific examples include compounds that can be used in the functional materials according to the present disclosure. Furthermore, when targeting photosensitive materials, nonionic surfactants having an alkylene oxide group, among silicone surfactants, are preferred because they cause less sensitivity loss during storage of the photosensitive material and, particularly, cause less mordanting inhibition when used in diffusion transfer silver halide photographic photosensitive materials.
Examples of surfactants that can be used in combination include those described in JP-A-62-215272 (pp. 649-706), Research Disclosure (RD) Item 17643, pp. 26-27 (December 1978), RD Item 18716, p. 650 (November 1979), and RD 307105, p. 875-876 (November 1989).

A typical example of a material that may be contained in the aqueous coating composition is a polymer compound. The polymer compound may be a polymer that is soluble in a water-soluble solvent (a soluble polymer) or an aqueous dispersion of a polymer (a so-called polymer latex).
The soluble polymer is not particularly limited, and examples thereof include gelatin, polyvinyl alcohol, casein, agar, gum arabic, hydroxyethyl cellulose, methyl cellulose, and carboxymethyl cellulose. Examples of the polymer latex include homopolymers or copolymers of various vinyl monomers (for example, acrylate derivatives, methacrylate derivatives, acrylamide derivatives, methacrylamide derivatives, styrene derivatives, conjugated diene derivatives, N-vinyl compounds, O-vinyl compounds, vinyl nitrile, and other vinyl compounds (for example, ethylene and vinylidene chloride)), and dispersions of condensation polymers (for example, polyesters, polyurethanes, polycarbonates, and polyamides). Detailed examples of this type of polymer compound can be found, for example, in JP-A-62-215272 (pp. 707-763), Research Disclosure (RD) Item 17643, p. 651 (December 1978), RD Item 18716, p. 650 (November 1979), and RD Item 307105, p. 873-874 (November 1989).

The solvent in the aqueous coating composition may be water alone, or a mixed solvent of water and an organic solvent other than water (e.g., methanol, ethanol, isopropyl alcohol, n-butanol, methyl cellosolve, dimethylformamide, acetone, ethyl acetate, etc.). The proportion of water in the solvent in the aqueous coating composition is preferably 50% by mass or more.

The above-mentioned aqueous coating composition may contain various compounds depending on the layer of the photographic material to be used, and these may be dissolved or dispersed in the medium. Examples of these include various couplers, ultraviolet absorbers, color mixing inhibitors, static inhibitors, scavengers, antifoggants, film hardeners, dyes, and antifungal agents. Furthermore, to obtain effective antistatic properties and coating uniformity when used in photographic materials, it is preferable to use it in the uppermost hydrophilic colloid layer.

In this case, the coating composition for the layer may contain, in addition to the hydrophilic colloid (e.g., gelatin) and the ionic compound according to the present disclosure, other surfactants, matting agents, slipping agents, colloidal silica, plasticizers, etc.

There are no particular restrictions on the amount of the ionic compound according to the present disclosure used, and the amount can be freely changed depending on the structure and use of the ionic compound according to the present disclosure, the type and amount of compounds contained in the aqueous composition, the composition of the solvent, etc. For example, when the ionic compound according to the present disclosure is used as a coating solution for the hydrophilic colloid (gelatin) layer, which is the uppermost layer of a photographic light-sensitive material, which is a preferred embodiment of the present disclosure, the concentration in the coating solution is preferably 0.003% to 0.5% by mass, and preferably 0.03% to 10% by mass relative to the gelatin solids content.

In the present disclosure, when a photographic material has a layer comprising a hydrophobic binder component, the composition for producing that layer can contain an ionic compound according to the present disclosure and a hydrophobic binder component together with an organic solvent. In this case, the preferred embodiments are the same as those for the layer containing the ionic compound according to the present disclosure described above.

The silver halide photographic light-sensitive material according to the present disclosure may have at least one light-sensitive layer provided on a support.
A typical example is a silver halide photographic material having at least one light-sensitive layer composed of multiple silver halide emulsion layers with substantially the same color sensitivity but different photosensitivities on a support. The light-sensitive layer is a unit light-sensitive layer sensitive to either blue, green, or red light. In a multilayer silver halide color photographic material, the unit light-sensitive layers are generally arranged in the following order from the support side: red-sensitive layer, green-sensitive layer, and blue-sensitive layer. However, depending on the purpose, the above arrangement order may be reversed, or a different light-sensitive layer may be sandwiched between layers of the same color sensitivity. Light-insensitive layers may be arranged between the above silver halide light-sensitive layers, as well as in the top and bottom layers. These may contain couplers, DIR compounds, color-mixing inhibitors, etc., as described below. The plurality of silver halide emulsion layers constituting each unit photosensitive layer are preferably arranged in two layers, a high-sensitivity emulsion layer and a low-sensitivity emulsion layer, in order of decreasing sensitivity toward the support, as described in DE 1,121,470 or GB 923,045. Alternatively, a low-sensitivity emulsion layer may be arranged farther from the support and a high-sensitivity emulsion layer closer to the support, as described in JP-A Nos. 57-112751, 62-200350, 62-206541 and 62-206543.

Specific examples include, from the side furthest from the support, the layers may be arranged in the following order: low-sensitivity blue-sensitive layer (BL)/high-sensitivity blue-sensitive layer (BH)/high-sensitivity green-sensitive layer (GH)/low-sensitivity green-sensitive layer (GL)/high-sensitivity red-sensitive layer (RH)/low-sensitivity red-sensitive layer (RL), or in the order BH/BL/GL/GH/RH/RL, or BH/BL/GH/GL/RL/RH.

Furthermore, as described in JP-B No. 55-34932, the layers can be arranged in the order of blue-sensitive layer/GH/RH/GL/RL from the side farthest from the support. Furthermore, as described in JP-A Nos. 56-25738 and 62-63936, the layers can be arranged in the order of blue-sensitive layer/GL/RL/GH/RH from the side farthest from the support. Another example is an arrangement composed of three layers with differing photosensitivities, with the photosensitivity decreasing sequentially toward the support, in which the upper layer is a silver halide emulsion layer with the highest photosensitivity, the middle layer is a silver halide emulsion layer with a lower photosensitivity, and the lower layer is a silver halide emulsion layer with an even lower photosensitivity than the middle layer, as described in JP-B No. 49-15495. Even when composed of three layers with different photosensitivities, the layers sensitive to the same color may be arranged in the following order from the side farthest from the support: medium-sensitivity emulsion layer, high-sensitivity emulsion layer, and low-sensitivity emulsion layer, as described in JP-A-59-202464.

Alternatively, the layers may be arranged in the order of high-sensitivity emulsion layer/low-sensitivity emulsion layer/mid-sensitivity emulsion layer, or low-sensitivity emulsion layer/mid-sensitivity emulsion layer/high-sensitivity emulsion layer. Furthermore, even when there are four or more layers, the arrangement may be changed as described above. To improve color reproducibility, it is preferable to arrange a donor layer (CL) with a bilayer effect that has a different spectral sensitivity distribution from the main photosensitive layers such as BL, GL, and RL adjacent to or close to the main photosensitive layer, as described in U.S. Pat. Nos. 4,663,271, 4,705,744, and 4,707,436, and JP-A Nos. 62-160448 and 63-89850.

The preferred silver halide for use in this disclosure is silver iodobromide, silver iodochloride, or silver iodochlorobromide containing about 30 mol% or less of silver iodide. Particularly preferred is silver iodobromide or silver iodochlorobromide containing about 2 mol% to about 10 mol% of silver iodide.

The silver halide grains in photographic emulsions may have regular crystals such as cubes, octahedrons, or tetradecahedrons; irregular crystal shapes such as spheres or plates; crystal defects such as twin planes; or a combination of these. The silver halide grain size may be grains of approximately 0.2 μm or less, or large grains with a projected area diameter of up to approximately 10 μm, and the emulsion may be either polydispersed or monodispersed.

Silver halide photographic emulsions that can be used in this disclosure are described, for example, in Research Disclosure (hereinafter abbreviated as RD) No. 17643 (December 1978), pp. 22-23, "I. Emulsion preparation and types," and in Research Disclosure No. 18716 (November 1979), p. 648, "I. Emulsion preparation and types." 307105 (November 1989), pp. 863-865, "Physics and Chemistry of Photography" by Glafkides, published by Paul Montel (P. Glafkides, Chimie et Physique Photographiques, Paul Montel, 1967), "Chemistry of Photographic Emulsions" by G.F. Duffin, published by Focal Press (G.F. Duffin, Photographic Emulsion Chemistry) They can be prepared using methods such as those described in "Photographic Emulsion Chemistry" by V.L. Zelikman et al., "Making and Coating Photographic Emulsions," Focal Press, 1964.

Monodisperse emulsions such as those described in U.S. Pat. Nos. 3,574,628, 3,655,394, and GB 1,413,748 are also preferred. Tabular grains having an aspect ratio of approximately 3 or more can also be used in the present disclosure. In particular, to improve storage stability, it is preferable to use emulsions in which 50% or more of the total projected area is accounted for by silver halide tabular grains having an aspect ratio of 8 or more. There is no particular upper limit to the aspect ratio, but a ratio of 30 or less is preferred. Tabular grains can be easily prepared by the methods described in Gutoff, Photographic Science and Engineering, Vol. 14, pp. 248-257 (1970); U.S. Pat. Nos. 4,434,226, 4,414,310, 4,433,048, 4,439,520, and GB 2,112,157.

The crystal structure may be uniform, or the interior and exterior may have different halogen compositions, or may have a layered structure. Silver halides of different compositions may be joined by epitaxial junction, and may be joined with compounds other than silver halide, such as silver rhodanide or lead oxide. A mixture of grains with various crystal forms may also be used.

The above emulsions may be of the surface latent image type, in which the latent image is formed primarily on the surface, or the internal latent image type, in which the latent image is formed inside the grains, or of the type having latent images both on the surface and inside, but they must be negative-working emulsions. Among the internal latent image types, the core/shell internal latent image type emulsions described in JP-A No. 63-264740 may also be used, and the preparation method for this is described in JP-A No. 59-133542. The shell thickness of this emulsion varies depending on the development process, etc., but is preferably 3 nm to 40 nm, with 5 nm to 20 nm being particularly preferred.

Silver halide emulsions are usually used after physical ripening, chemical ripening, and spectral sensitization. Additives used in these processes are described in RD Nos. 17643, 18716, and 307105, and the relevant sections are summarized in the table below.

The silver halide photographic material according to the present disclosure can use two or more types of emulsions that differ in at least one of the following characteristics in the same layer: grain size, grain size distribution, halogen composition, grain shape, and sensitivity. Surface-fogged silver halide grains, as described in U.S. Pat. No. 4,082,553, internally fogged silver halide grains, as described in U.S. Pat. No. 4,626,498 and JP-A-59-214852, and colloidal silver are preferably applied to a photosensitive silver halide emulsion layer and/or a substantially light-insensitive hydrophilic colloid layer. Internally or surface-fogged silver halide grains refer to silver halide grains that can be developed uniformly (non-imagewise) in both unexposed and exposed areas of the photosensitive material, and their preparation methods are described in U.S. Pat. No. 4,626,498 and JP-A-59-214852. The silver halide forming the inner core of the internally fogged core/shell silver halide grains may have a different halogen composition. The silver halide used to fog the interior or surface of the grains may be any of silver chloride, silver chlorobromide, silver iodobromide, and silver chloroiodobromide. The average grain size of these fogged silver halide grains is preferably 0.01 μm to 0.75 μm, and more preferably 0.05 μm to 0.6 μm. The grain shape may be regular or a polydisperse emulsion, but monodisperse (at least 95% of the silver halide grains by mass or number have a grain size within ±40% of the average grain size) is preferred.

In the present disclosure, it is preferable to use non-photosensitive particulate silver halide. Non-photosensitive particulate silver halide refers to silver halide grains that are not exposed to light during imagewise exposure to obtain a dye image and are not substantially developed during the subsequent development process; it is preferable that they are not pre-fogged. The particulate silver halide has a silver bromide content of 0 to 100 mol % and may contain silver chloride and/or silver iodide as needed. Preferably, it contains 0.5 to 10 mol % silver iodide. The particulate silver halide preferably has an average grain size (average value of the circle-equivalent diameter of the projected area) of 0.01 μm to 0.5 μm, more preferably 0.02 μm to 0.2 μm.

Grain-shaped silver halide can be prepared in the same manner as ordinary photosensitive silver halide. The surfaces of the silver halide grains do not need to be optically sensitized, and spectral sensitization is also not required. However, prior to adding this to the coating solution, it is preferable to add a known stabilizer such as a triazole-based, azaindene-based, benzothiazolium-based, or mercapto-based compound, or a zinc compound. Colloidal silver can be incorporated into this layer containing grain-shaped silver halide particles.

The coated silver amount of the silver halide photographic light-sensitive material according to the present disclosure is preferably 6.0 g/m ² or less, and more preferably 4.5 g/m ² or less.

Photographic additives that can be used in this disclosure are also described in the RD, and the relevant sections are indicated in the table below.

In the silver halide photographic light-sensitive material according to the present disclosure, various dye-forming couplers can be used, but the following couplers are particularly preferred.
Yellow couplers: couplers represented by formula (I) or (II) in EP 502,424A; couplers represented by formula (1) or (2) in EP 513,496A (particularly Y-28 on page 18); couplers represented by formula (I) in claim 1 of EP 568,037A couplers represented by formula (I) in lines 45 to 55 of column 1 of U.S. Pat. No. 5,066,576; couplers represented by formula (I) in paragraph 0008 of JP-A No. 4-274425; couplers described in claim 1 on page 40 of EP 498,381 A1 (particularly D-35 on page 18); couplers represented by formula (Y) on page 4 of EP 447,969 A1 (particularly Y-1 (page 17) and Y-54 (page 41)); and couplers represented by formulas (II) to (IV) in lines 36 to 58 of column 7 of U.S. Pat. No. 4,476,219 (particularly II-17, II-19 (column 17) and II-24 (column 19)).

Magenta couplers: JP-A No. 3-39737 (L-57 (bottom right on page 11), L-68 (bottom right on page 12), L-77 (bottom right on page 13); A-4-63 (page 134), A-4-73,-75 (page 139) of EP 456,257; M-4,-6 (page 26), M-7 (page 27) of EP 486,965; M-45 (page 19) of EP 571,959A; (M-1) (page 6) of JP-A No. 5-204106; M-22 in paragraph 0237 of JP-A No. 4-362631.

Cyan couplers: CX-1, 3, 4, 5, 11, 12, 14, 15 (pages 14-16) of JP-A No. 4-204843; C-7, 10 (page 35), 34, 35 (page 37), (I-1), (I-17) (pages 42-43) of JP-A No. 4-43345; and couplers represented by formula (Ia) or (Ib) in claim 1 of JP-A No. 6-67385.

Polymer couplers: P-1 and P-5 (page 11) of JP-A No. 2-44345.
As couplers from which color-forming dyes have appropriate diffusibility, those described in U.S. Pat. No. 4,366,237, British Patent No. 2,125,570, European Patent No. 96,873B and German Patent No. 3,234,533 are preferred.

Preferred couplers for correcting unwanted absorption of color-forming dyes include yellow-colored cyan couplers represented by formulae (CI), (CII), (CIII), and (CIV) described on page 5 of European Patent Application Publication No. 456,257A1 (particularly YC-86 on page 84), yellow-colored magenta couplers ExM-7 (page 202), EX-1 (page 249), and EX-7 (page 251) described in European Patent Application Publication No. 456,257A1, magenta-colored cyan couplers CC-9 (column 8) and CC-13 (column 10) described in U.S. Pat. No. 4,833,069, (2) (column 8) of U.S. Pat. No. 4,837,136, and colorless masking couplers represented by formula (A) in claim 1 of WO 92/11575 (particularly the exemplified compounds on pages 36 to 45).

Couplers that release a photographically useful group include the following: Development inhibitor-releasing compounds: Compounds represented by formulas (I), (II), (III), and (IV) described on page 11 of European Patent Application Publication No. 378,236A1 (particularly T-101 (page 30), T-104 (page 31), T-113 (page 36), T-131 (page 45), T-144 (page 51), and T-158 (page 58)), compounds represented by formula (I) described on page 7 of European Patent Application Publication No. 436,938A2 (particularly D-49 (page 51)), and compounds represented by formula (II) described on page 11 of European Patent Application Publication No. 436,938A2 (particularly D-49 (page 51)). Compounds represented by formula (1) in JP-A-568,037A (particularly (23) (page 11)), compounds represented by formulas (I), (II), (III) described on pages 5 to 6 in EP-A-440,195A2 (particularly I-(1) on page 29); bleach accelerator-releasing compounds: compounds represented by formulas (I) and (I') on page 5 in EP-A-310,125A2 (particularly (60) and (61) on page 61) and compounds according to claim 1 in JP-A-6-59411. Compounds represented by formula (I) (particularly (7) (page 7)); ligand-releasing compounds: compounds represented by LIG-X described in claim 1 of U.S. Pat. No. 4,555,478 (particularly the compounds in columns 21 to 41 of column 12); leuco dye-releasing compounds: compounds 1 to 6 in columns 3 to 8 of U.S. Pat. No. 4,749,641; fluorescent dye-releasing compounds: compounds represented by COUP-DYE described in claim 1 of U.S. Pat. No. 4,774,181 (particularly columns 7 to 10) Compounds 1 to 11); development accelerator or fogging agent-releasing compounds: compounds represented by formulas (1), (2), and (3) in column 3 of U.S. Pat. No. 4,656,123 (particularly (I-22) in column 25) and ExZK-2 on page 75, lines 36 to 38 of EP 450,637 A2; compounds that release a group that becomes a dye only upon release: compounds represented by formula (I) in claim 1 of U.S. Pat. No. 4,857,447 (particularly Y-1 to Y-19 in columns 25 to 36).

As additives other than couplers, the following are preferred: Dispersion medium of oil-soluble organic compound: P-3, 5, 16, 19, 25, 30, 42, 49, 54, 55, 66, 81, 85, 86, 93 (pages 140-144) of JP-A-62-215272; Impregnation latex of oil-soluble organic compound: latex described in U.S. Pat. No. 4,199,363; Oxidized developer scavenger: compounds represented by formula (I) in column 2, lines 54-62 of U.S. Pat. No. 4,978,606 (particularly I-, (1), (2), (6), (12) (columns 4-5), U.S. Pat. No. Formulae in columns 2, lines 5 to 10 of European Patent Application Publication No. 4,923,787 (particularly Compound 1 (column 3)); stain inhibitors: formulae (I) to (III) in pages 4, lines 30 to 33 of European Patent Application Publication No. 298321A, particularly I-47, 72, III-1, 27 (pages 24 to 48); discoloration inhibitors: A-6, 7, 20, 21, 23, 24, 25, 26, 30, 37, 40, 42, 48, 63, 90, 92, 94, 164 (pages 69 to 118) of European Patent Application Publication No. 298321A; No. 2,444, columns 25 to 38, II-1 to III-23, especially III-10; European Patent Application Publication No. 471347A, pages 8 to 12, I-1 to III-4, especially II-2; U.S. Patent Application Publication No. 5,139,931, columns 32 to 40, A-1 to A-48, especially A-39 and A-42; materials that reduce the amount of color-development enhancer or color-mix inhibitor used: European Patent Application Publication No. 411324A, pages 5 to 24, I-1 to II-15, especially I-46; formalin scavenger: European Patent Application Publication No. Hardeners: H-1, H-4, H-6, H-8, H-14 on page 17 of JP-A-1-214845, compounds represented by formula (VII) to (XII) (H-1 to H-54) on columns 13 to 23 of U.S. Pat. No. 4,618,573, compounds represented by formula (6) (H-1 to H-76), H-14 on the bottom right of page 8 of JP-A-2-214852, and compounds described in claim 1 of U.S. Pat. No. 3,325,287; development inhibitor precursors: P-24, 37, 39 (pages 6-7) of JP-A-62-168139; compounds described in claim 1 of U.S. Pat. No. 5,019,492, particularly compounds 28 and 29 in column 7; preservatives and antifungal agents: I-1 to III-43 in columns 3-15 of U.S. Pat. No. 4,923,790, particularly compounds II-1, 9, 10, 18, and III-25; stabilizers and antifogging agents: I-1 to (14) in columns 6-16 of U.S. Pat. No. 4,923,793, particularly compounds I-1, 60, (2), and (13), U.S. Pat. No. 4,952 Compounds 1 to 65, particularly 36, in columns 25 to 32 of JP-A-483; chemical sensitizer: triphenylphosphine selenide, compound 50 of JP-A-5-40324; dyes: a-1 to b-20, particularly a-1, 12, 18, 27, 35, 36, b-5, and V-1 to 23, particularly V-1, in pages 15 to 18 of JP-A-3-156450; F-I-1 to F-II-43, particularly F-I-11 and F-II-8, in pages 33 to 55 of EP-A-445627A; No. 457153A, pages 17 to 28, III-1 to 36, particularly III-1 and III-3; microcrystalline dispersions of Dye-1 to 124, pages 8 to 26, of WO 88/04794; compounds 1 to 22, particularly compound 1, of EP 319999A, pages 6 to 11, compounds D-1 to D-87 represented by formulas (1) to (3) of European Patent Application Publication No. 519306A (pages 3 to 28); compounds 1 to 22 represented by formula (I) of U.S. Pat. No. 4,268,622 (columns 3 to 10); U.S. Pat. No. 4,923,788 Compounds (1) to (31) represented by formula (I) in the specification (columns 2 to 9); UV absorbers: compounds (18b) to (18r) and 101 to 427 represented by formula (1) in JP 46-3335 A (pages 6 to 9), compounds (3) to (66) represented by formula (I) in EP 520938 A (pages 10 to 44) and compounds HBT-1 to 10 represented by formula (III) in EP 521823 A (columns 2 to 9), and compounds (1) to (31) represented by formula (1) in EP 521823 A (columns 2 to 9).

This disclosure can be applied to various color photosensitive materials such as black-and-white photographic paper, black-and-white negative film, X-ray film, color negative film for general use or cinema, color reversal film for slides or television, color paper, color positive film, and color reversal paper. It is also suitable for use in the lens-fitted film units described in Japanese Patent Publication No. 2-32615 and Japanese Utility Model Publication No. 3-39784.

Suitable supports that can be used in the present disclosure are described, for example, in the above-mentioned RD. No. 17643, page 28; RD. No. 18716, page 647 (right column) to page 648 (left column); and RD. No. 307105, page 879.

In the silver halide photographic light-sensitive material according to the present disclosure, the total thickness of all hydrophilic colloid layers on the emulsion layer side is preferably 28 μm or less, more preferably 23 μm or less, even more preferably 18 μm or less, and particularly preferably 16 μm or less. The film swelling rate T _1/2 is preferably 30 seconds or less, more preferably 20 seconds or less. T _1/2 is defined as the time required for the film thickness to reach half of the saturated film thickness, which is 90% of the maximum swollen film thickness achieved when processed in a color developer at 30°C for 3 minutes and 15 seconds. The film thickness refers to the film thickness measured at 25°C and 55% relative humidity (for 2 days). T _1/2 can be measured using a swellometer (swellometer) of the type described in A. Green et al., Photogr. Sci. Eng., Vol. 19, pp. 2, 124-129. T1 _/2 can be adjusted by adding a film hardener to gelatin as a binder or by changing the aging conditions after coating. The swelling ratio is preferably 150% to 400%. The swelling ratio is calculated from the maximum swollen film thickness under the above conditions as follows:
It can be calculated using the formula: (maximum swelling film thickness - film thickness)/film thickness.

The silver halide photographic light-sensitive material according to the present disclosure preferably has a hydrophilic colloid layer (referred to as a backing layer) with a total dry film thickness of 2 μm to 20 μm on the side opposite the emulsion layer. This backing layer preferably contains the above-mentioned light absorbers, filter dyes, ultraviolet absorbers, anti-static agents, film hardeners, binders, plasticizers, lubricants, coating aids, and surfactants. The swelling ratio of this backing layer is preferably 150% to 500%.

The silver halide photographic light-sensitive material disclosed herein can be developed using the conventional methods described in the above-mentioned RD. No. 17643, pages 28-29, RD. No. 18716, paragraph 651, left and right columns, and RD. No. 307105, pages 880-881.

In the present disclosure, an antistatic agent is preferably used.
Examples of such antistatic agents include polymers containing carboxylic acids and carboxylates, sulfonates, cationic polymers, ionic surfactant compounds, and π-electron conjugated conductive polymers. Preferred antistatic agents are at least one selected from ZnO, TiO ₂ , SnO ₂ , Al ₂ O ₃ , In ₂ O ₃ , SiO ₂ , MgO, BaO, MoO ₃ , and V ₂ O ₅ , and having a volume resistivity of 10 ⁷ Ω·cm or less, more preferably 10 ⁵ Ω·cm or less, and particles of crystalline metal oxides of these or composite oxides thereof (e.g., Sb, P, B, In, S, Si, and C), with a particle size of 0.001 μm to 1.0 μm, or particles of sol-like metal oxides or composite oxides thereof. The content of these metal oxides in the silver halide photographic light-sensitive material is preferably 5 mg/m ² to 500 mg/m ² , and particularly preferably 10 mg/m ² to 350 mg/m ² . The ratio of the amount of conductive crystalline oxide or composite oxide thereof to the binder is preferably 1/300 to 100/1, more preferably 1/100 to 100/5. Examples of π-electron conjugated conductive polymers include polythiophene compounds, polypyrrole compounds, and polyfuran compounds. Preferably, a latex-like aqueous dispersion containing a polythiophene compound and a polymeric polyanion compound can be used. For detailed structure of the compound, composition of the dispersion, and preferred embodiments of the dispersant used in combination, the methods described in JP-A-2003-330145, JP-A-4244541, JP-A-2016-120650, and JP-A-8-211615 can be used.

It is preferable that the silver halide photographic light-sensitive material according to the present disclosure has slipperiness. A slip-agent-containing layer is preferably used on both the light-sensitive layer surface and the back surface. The preferred slipperiness is a dynamic friction coefficient of 0.01 or more and 0.25 or less. This measurement represents the value when conveyed at 60 cm/min against a 5 mm diameter stainless steel ball (25°C, 60% RH). In this evaluation, even if the light-sensitive layer surface is substituted as the mating material, the value will be roughly the same.

Slipping agents that can be used in the present disclosure include polyorganosiloxanes, higher fatty acid amides, higher fatty acid metal salts, and esters of higher fatty acids and higher alcohols. Examples of polyorganosiloxanes that can be used include polydimethylsiloxane, polydiethylsiloxane, polystyrylmethylsiloxane, and polymethylphenylsiloxane. The outermost layer or back layer of the emulsion layer is preferred as the additive layer. Polydimethylsiloxane or an ester with a long-chain alkyl group is particularly preferred.

The silver halide photographic light-sensitive material according to the present disclosure preferably contains a matting agent. The matting agent may be added to either the emulsion side or the back side, but it is particularly preferred to add it to the outermost layer on the emulsion side. The matting agent may be soluble or insoluble in the processing solution, and it is preferable to use both in combination. Examples of suitable matting agents include polymethyl methacrylate, poly(methyl methacrylate/methacrylic acid = 9/1 or 5/5 (molar ratio)), and polystyrene particles. The particle size is preferably 0.8 μm to 10 μm, and a narrow particle size distribution is also preferred, with 90% or more of the total number of particles preferably falling within a range of 0.9 to 1.1 times the average particle size. To enhance matting properties, it is also preferable to simultaneously add particles of 0.8 μm or smaller. Examples include polymethyl methacrylate (0.2 μm), poly(methyl methacrylate/methacrylic acid = 9/1 (molar ratio), 0.3 μm), polystyrene particles (0.25 μm), and colloidal silica (0.03 μm).

The silver halide photographic light-sensitive material according to the present disclosure may contain other known additives in each layer.
Furthermore, even if the silver halide photographic light-sensitive material according to the present disclosure is not sensitive to X-ray irradiation, the constitution and components of a silver halide photographic light-sensitive material that is sensitive to X-ray irradiation, which will be described later, may be used, if necessary.

Furthermore, below we will explain silver halide photographic materials that are sensitive to X-ray irradiation.

A preferred example of a silver halide photographic material is a silver halide photographic material that is sensitive to X-ray irradiation.

[Silver halide emulsion]
First, the silver halide emulsions used in the present disclosure will be described.

1) Halogen Composition. Photosensitive silver halide grains can be silver chloride, silver chlorobromide, silver bromide, silver iodobromide, or silver iodochlorobromide. However, as mentioned above, from the viewpoint of rapid processing, the average iodine content of the photosensitive silver halide grains is preferably 0 mol % to 0.45 mol %. This iodine content is more preferably 0.05 mol % to 0.40 mol %, and even more preferably 0.10 mol % to 0.30 mol %. Here, the "average" iodine content of the photosensitive silver halide grains refers to the average iodine content calculated from the halogen composition of each photosensitive silver halide grain. The halogen composition distribution within the photosensitive silver halide grains may be uniform, stepwise, or continuously varying. Furthermore, photosensitive silver halide grains having a core/shell structure may also be used.

2) Grain Shape Suitable photosensitive silver halide grains include so-called halogen conversion type grains, as described in British Patent No. 635,841 and U.S. Patent No. 3,622,318. Halogen conversion is usually achieved by adding an aqueous halide solution having a smaller solubility product with silver than the halogen composition on the grain surface before halogen conversion. For example, conversion is achieved by adding an aqueous potassium bromide and/or potassium iodide solution to silver chloride or silver chlorobromide tabular grains, or by adding an aqueous potassium iodide solution to silver bromide or silver iodobromide tabular grains. The concentration of these aqueous solutions added is preferably low, preferably 30% or less, and more preferably 10% or less. Furthermore, it is preferred to add the conversion halide solution at a rate of 1 mol% per minute or less per mole of silver halide before halogen conversion. Furthermore, during halogen conversion, a sensitizing dye and/or a silver halide adsorbent may be present in part or in whole, and silver halide grains such as silver bromide, silver iodobromide, or silver iodide may be added instead of the converted halogen aqueous solution. The size of these fine grains is preferably 0.2 μm or less, more preferably 0.1 μm or less, and particularly preferably 0.05 μm or less. The halogen conversion method is not limited to the above-mentioned methods, and can be used in combination as appropriate depending on the purpose.

3) Grain Size Methods for forming photosensitive silver halide grains are well known in the art, and they can be prepared by using, for example, the methods described in JP-A No. 2-68539, U.S. Pat. No. 3,700,458, and Research Disclosure No. 17029, June 1978.

4) Chemical Sensitization Methods As chemical sensitization methods, those described in JP-A No. 2-68539, page 10, upper right column, line 13 to lower left column, line 16, JP-A Nos. 5-313282 and 6-110144 can be used.
As a method for chemical sensitization of a silver halide emulsion, specifically, known methods such as sulfur sensitization, selenium sensitization, reduction sensitization, and gold sensitization in the presence of a silver halide adsorbent can be used, and these methods can be used alone or in combination.

Among the noble metal sensitization methods, gold sensitization is a typical example, which uses gold compounds, mainly gold complex salts. Complex salts of noble metals other than gold, such as platinum, palladium, and iridium, may also be used. Specific examples are described in U.S. Pat. No. 2,448,060 and British Patent No. 618,061.
As the sulfur sensitizer, in addition to the sulfur compounds contained in gelatin, various sulfur compounds such as thiosulfates, thioureas, thiazoles, rhodanines, etc. can be used. Specific examples are described in U.S. Patent Nos. 1,574,944, 2,278,947, 2,410,689, 2,728,668, 5,501,313, and 3,656,955. Selenium sensitizers are described in JP-A-6-110144.
The combined use of sulfur sensitization with thiosulfate, selenium sensitization, and gold sensitization is useful. As reduction sensitizers, stannous salts, amines, formamine disulfide acid, silane compounds, etc. can be used.

5) Antifoggants and stabilizers Examples of antifoggants and stabilizers that can be used include those described in JP-A No. 2-68539, page 10, lower left column, line 17 to page 11, upper left column, line 7, and page 3, lower left column, line 2 to page 4, lower left column.

Specific examples of compounds that can be added include azoles (e.g., benzothiazolium salts, etroimidazoles, nitrobenzimidazoles, chlorobenzimidazoles, chromobenzimidazoles, nitroindazoles, benzotriazoles, aminotriazoles, etc.); mercapto compounds (e.g., mercaptothiazoles, mercaptobenzimidazoles, mercaptothiadiazoles, mercaptotetrazoles, mercaptopyrimidazoles, mercaptotriazines, etc.); thioketo compounds such as oxadrinethione; azaindenes (e.g., triazaindenes, tetraazaindenes (especially 4-hydroxy-substituted (1,3,3a,7)tetraazaindenes), pentaazaindenes, etc.); and compounds known as antifogging agents or stabilizers, such as benzenethiosulfonic acid, benzenesulfinic acid, and benzenesulfonic acid amide.

In particular, nitrones and derivatives thereof described in JP-A Nos. 60-76743 and 60-87322, mercapto compounds described in JP-A No. 60-80839, heterocyclic compounds described in JP-A No. 57-164735, and complex salts of heterocyclic compounds and acids (e.g., 1-phenyl-5-mercaptotetrazoles) are preferably used.

Furthermore, purines or nucleic acids, or polymeric compounds described in JP-B No. 61-36213 and JP-A No. 59-90844, etc., can also be used. Among these, azaindenes, purines, and nucleic acids are particularly preferred. The amount of these compounds added is preferably 0.5 to 5.0 millimoles, and more preferably 0.5 to 3.0 millimoles, per mole of silver halide.

6) Color Tone Improver Examples of the color tone improver include those described in JP-A-62-276539, page 2, lower left column, line 7 to page 10, lower left column, line 20, and JP-A-3-94249, page 6, lower left column, line 15 to page 11, upper right column, line 19.
Specifically, the covering power of the silver halide photographic emulsion layer is set to 60 or more, and the silver halide photographic emulsion layer and/or other layers can contain a dye having a maximum absorption wavelength between 520 nm and 560 nm and a dye having a maximum absorption wavelength between 570 nm and 700 nm so that the increase in optical density due to the contained dyes in the transmission density of the unexposed area after development processing is 0.03 or less.

Representative examples of emulsions for making the covering power of the silver halide photographic emulsion layer 60 or more include tabular emulsions, grain emulsions, etc. In particular, when the silver halide photographic emulsion is made up of tabular silver halide grains having a grain thickness of 0.4 μm or less, or when a mixed emulsion of a high iodine surface photosensitive emulsion and an emulsion made up of grains with internal fogging is used, the effect of improving color tone is significant.
Dyes that can be used to improve color tone include a combination of a dye having a maximum absorption wavelength preferably between 520 nm and 560 nm, more preferably between 530 nm and 555 nm, and a dye having a maximum absorption wavelength preferably between 570 nm and 700 nm, more preferably between 580 nm and 650 nm. The maximum absorption wavelength means the maximum absorption wavelength when the dye is present in a photosensitive material.

The dye may be selected from anthraquinone dyes, azo dyes, azomethine dyes, indoaniline dyes, oxonol dyes, carbocyanine dyes, styryl dyes, triphenylmethane dyes, etc., and may have a predetermined maximum wavelength. Taking into consideration the stability to development processing, light fastness, and effects on photographic performance such as desensitization, fogging, and staining, preferred dyes are used from anthraquinone dyes, azo dyes, azomethine dyes, and indoaniline dyes. Preferred compounds are described in JP-A No. 62-276539, page 3, upper left column, line 5 to page 9, upper left column, line 9.
Such dyes can be dispersed in emulsion layers and other hydrophilic colloid layers (intermediate layers, protective layers, antihalation layers, filter layers, etc.) by various known methods, and specific examples are described in JP-A No. 62-276539, page 9, upper left column, line 14 to page 10, lower left column, line 20.

7) Spectral Sensitizing Dyes Examples of spectral sensitizing dyes include those described in JP-A No. 2-68539, page 4, line 4 in the lower right column to page 8, lower right column.
Specifically, cyanine dyes, merocyanine dyes, complex cyanine dyes, complex merocyanine dyes, holopolar cyanine dyes, styryl dyes, hemicyanine dyes, oxonol dyes, hemioxonol dyes, and the like can be used.
Sensitizing dyes are described in, for example, U.S. Pat. Nos. 3,522,052, 3,617,197, 3,713,828, 3,615,643, 3,615,632, 3,617,293, 3,628,964, 3,703,377, 3,666,480, 3,667,960, 3,679,428, 3,672,897, 3,769,026, 3,556,800, 3,615,613, 3,613, These sensitizing dyes are described in, for example, Japanese Patent Application Laid-Open Nos. 638, 3,615,635, 3,705,809, 3,632,349, 3,677,765, 3,770,449, 3,770,440, 3,769,025, 3,745,014, 3,713,826, 3,567,458, 3,625,698, 2,526,632, 2,503,776, JP-A-48-76525, and Belgian Patent No. 691807. The amount of sensitizing dye added is preferably 0.5 mmol or more and less than 4 mmol, more preferably 0.5 mmol or more and less than 1.5 mmol, per mole of silver halide.
Specific examples of sensitizing dyes include II-1 to II-47 described on pages 5 to 8 of JP-A No. 2-68539.

8) Antistatic Agent In the present disclosure, surfactants described in JP-A No. 2-68539, page 11, upper left column, line 14 to page 12, upper left column, line 9 can be used as coating aids, antistatic agents, or charge adjusting agents.
The ionic compounds according to the present disclosure may also be used as coating aids, antistatic agents, or charge adjusting agents.
Specific examples of surfactants that can be used for such purposes include nonionic surfactants such as saponin (steroid-based), alkylene oxide derivatives (e.g., polyethylene glycol, polyethylene glycol/polypropylene glycol condensates, polyethylene glycol alkyl ethers or polyethylene glycol alkylaryl ethers, and silicone polyethylene oxide compounds), and sugar alkyl esters; anionic surfactants such as alkyl sulfonates, alkylbenzene sulfonates, alkylnaphthalene sulfonates, alkyl sulfates, N-acyl-N-alkyltaurines, sulfosuccinates, and sulfoalkylpolyoxyethylene alkylphenyl ethers; amphoteric surfactants such as alkyl betaines and alkyl sulfobetaines; and cationic surfactants such as aliphatic or aromatic quaternary ammonium salts, pyridinium salts, and imidazolium salts.

Among these, anions such as saponin, dodecylbenzenesulfonate Na salt, di-2-ethylhexyl α-sulfosuccinate Na salt, p-octylphenoxyethoxyethanesulfonate Na salt, dodecyl sulfate Na salt, triisopropylnaphthalenesulfonate Na salt, and N-methyl-oleoyl taurine Na salt; cations such as dodecyltrimethylammonium chloride, N-oleoyl-N',N',N'-trimethylammoniodiaminopropane bromide and dodecylpyridium chloride; betaines such as N-dodecyl-N,N-dimenalcarboxybetaine and N-oleyl-N,N-dimethylsulfobutylbetaine; and nonions such as poly(average polymerization degree n-10)oxyethylene cetyl ether, poly(n = 25)oxyethylene p-nonylphenol ether, and bis(1-poly(n = 15)oxyethylene-oxy-2,4-di-t-pentylphenyl)ethane can be particularly preferably used.
As the antistatic agent, nonionic surfactants described in JP-A Nos. 60-80848, 61-112144, 62-172343, 62-173459, and the like, alkali metal nitrates, conductive tin oxide, zinc oxide, vanadium pentoxide, or composite oxides of these doped with antimony or the like can be preferably used.

9) Matting Agents, Slipping Agents, and Plasticizers Examples of the matting agents, slipping agents, and plasticizers include those described in JP-A No. 2-68539, page 12, upper left column, line 10 to the upper right column, line 10, and page 14, lower left column, line 10 to the lower right column, line 1.
Specifically, examples of matting agents that can be used include fine particles of polymethyl methacrylate homopolymers or copolymers of methyl methacrylate and methacrylic acid, organic compounds such as starch, and inorganic compounds such as silica, titanium dioxide, sulfuric acid, and strontium barium, as described in U.S. Patent Nos. 2,992,101, 2,701,245, 4,142,894, and 4,396,706. The particle size is preferably 1.0 μm to 10 μm, and particularly preferably 2 μm to 5 μm.
In the surface layer of the silver halide photographic light-sensitive material according to the present disclosure, as a lubricant, in addition to silicone compounds described in U.S. Patent Nos. 3,489,576 and 4,047,958, and colloidal silica described in JP-B-56-23139, paraffin wax, higher fatty acid esters, starch derivatives, and the like can be used.

In the hydrophilic colloid layer of the silver halide photographic light-sensitive material according to the present disclosure, polyols such as trimethylolpropane, pentanediol, butanediol, ethylene glycol, glycerin, etc. can be used as a plasticizer. In addition, in the emulsion layer of the silver halide photographic light-sensitive material according to the present disclosure, a plasticizer such as a polymer or an emulsion can be contained to improve pressure characteristics.
For example, British Patent No. 738618 discloses a method using a heterocyclic compound, British Patent No. 738637 discloses an alkyl phthalate, British Patent No. 738639 discloses an alkyl ester, U.S. Patent No. 2,960,404 discloses a polyhydric alcohol, U.S. Patent No. 3,121,060 discloses a carboxyl alkyl cellulose, Japanese Patent Laid-Open No. 49-5017 discloses a method using paraffin and a carboxylate, and Japanese Patent Publication No. 53-28086 discloses a method using an alkyl acrylate and an organic acid, and these methods can also be used in the present disclosure.

10) Hydrophilic Colloid As a binder or protective colloid that can be used in the emulsion layer, intermediate layer, and surface protective layer of the silver halide photographic light-sensitive material according to the present disclosure, gelatin is advantageously used, but other hydrophilic colloids can also be used.
Examples of hydrophilic colloids include those described in JP-A No. 2-68539, page 12, upper right column, line 11 to lower left column, line 16.

For example, various synthetic hydrophilic polymeric substances can be used, such as gelatin derivatives, graft polymers of gelatin with other polymers, proteins such as albumin and casein; cellulose derivatives such as hydroxyethyl cellulose, carboxymethyl cellulose, and cellulose sulfate esters; sugar derivatives such as sodium alginate, dextran, and starch derivatives; and homopolymers or copolymers of polyvinyl alcohol, polyvinyl alcohol partial acetal (poly-N-vinylpyrrolidone, polyacrylic acid, polymethacrylic acid, polyacrylamide, polyvinylimidazole, polyvinylpyrazole, etc.).
As the gelatin, lime-processed gelatin, acid-processed gelatin, enzyme-processed gelatin, and gelatin hydrolysates and enzyme-decomposed gelatin can also be used.
Among these, it is preferable to use gelatin in combination with dextran or polyacrylamide having an average molecular weight of 100,000 or less. The methods described in JP-A-63-68887 and JP-A-63-149641 can also be used in the present disclosure.

11) Hardeners Photographic emulsions and non-light-sensitive hydrophilic colloids may contain inorganic or organic hardeners.
Examples of hardeners include those described in JP-A No. 2-68539, page 12, lower left column, line 17 to page 13, upper right column, line 6.
Specific examples of such compounds that can be used alone or in combination include chromium salts (chrome alum, chromium acetate, etc.), aldehydes (formaldehyde, glyoxal, dimethicone aldehyde, etc.), N-methylol compounds (dimethylol urea, methylol dimethyl dantoin, etc.), dioxane derivatives (2,3-dihydroxydioxane, etc.), active vinyl compounds (1,3,5-triacryloyl-hexahydro-s-triazine, bis(vinylsulfonyl)methyl ether, N,N'-methylenebis-(β-(vinylsulfonyl)propionamide)), active halogen compounds (2,4-dichloro-6-hydroxy-s-triazine, etc.), mucohalogen acids (mucochloric acid, mucophenoxychloroic acid, etc.), isoxazoles, dialdehyde starch, and 2-chloro-6-hydroxytriazinylated gelatin. Of these, the active vinyl compounds described in JP-A Nos. 53-41221, 53-57257, 59-162546 and 60-80846 and the active halides described in US Pat. No. 3,325,287 are preferred.

As the hardener, a polymer hardener can also be effectively used.
Examples of polymeric hardeners include dialdehyde starch, polyacrolein, polymers having an aldehyde group such as the acrolein copolymer described in U.S. Pat. No. 3,396,029, polymers having an epoxy group described in U.S. Pat. No. 3,623,878, polymers having a dichlorotriazine group described in U.S. Pat. No. 3,362,827 and Research Disclosure No. 17333 (1978), polymers having an active ester group described in JP-A No. 56-66841, polymers having an active ester group described in JP-A No. 56-142524, U.S. Pat. No. 4,161,407, JP-A No. 54-65033, and Research Disclosure No. 17333 (1978), and polymers having an active ester group described in JP-A No. 56-142524, U.S. Pat. No. 4,161,407, JP-A No. 54-65033, and Research Disclosure No. 17333 (1978). 16725 (1978), or a polymer having an active vinyl group or a group that will be a precursor thereof. Polymers having an active vinyl group or a group that will be a precursor thereof are preferred, and particularly preferred are polymers in which an active vinyl group or a group that will be a precursor thereof is bound to the polymer main chain by a long spacer, as described in JP-A-56-142524.
The hydrophilic colloid layer in the silver halide photographic light-sensitive material according to the present disclosure is preferably hardened with these hardeners so that the swelling ratio in water is 300% or less, particularly 230% or less.

12) Support Examples of the support include those described in JP-A No. 2-68539, page 13, upper right column, lines 7 to 20. Specifically, the support is preferably a polyethylene terephthalate film or a cellulose triacetate film.
In order to improve adhesion to the hydrophilic colloid layer, the surface of the support is preferably subjected to a corona discharge treatment, a glow discharge treatment or an ultraviolet irradiation treatment. Alternatively, a subbing layer made of a styrene-butadiene latex, a vinylidene chloride latex or the like may be provided, and a gelatin layer may be further provided on top of the subbing layer.
Furthermore, a subbing layer may be provided using an organic solvent containing a polyethylene swelling agent and gelatin. The adhesion of such a subbing layer to a hydrophilic colloid layer can be further improved by adding a surface treatment to the subbing layer.

13) Crossover Cut Method It is well known in the art that crossover light significantly reduces sharpness. As a means for keeping the crossover light of a photographic material to 12% or less, U.S. Pat. No. 4,130,429 and JP-A-61-116354 disclose methods for absorbing light of a wavelength that coincides with the emission wavelength of an X-ray fluorescent screen using a sensitizing dye or dye.

Furthermore, U.S. Pat. No. 4,800,150 discloses a technique in which a dye is present in the form of a microcrystalline dispersion between the support and the emulsion layer, thereby reducing crossover light to 10% or less. Japanese Patent Application Laid-Open No. 63-305345 discloses a technique in which an anionic dye is fixed in a specific layer using a cationic polymer latex, and Japanese Patent Application Laid-Open No. 1-166031 discloses a technique in which the dye fixing layer is an undercoat layer of the support. While any of these methods can be used in the photosensitive material of the present disclosure, it is preferred that the dye-colored layer be an undercoat layer, and that the dye be fixed by the method described in Japanese Patent Application Laid-Open No. 1-166031, and it is particularly preferred that the dye be fixed in the undercoat layer in the form of a microcrystalline dispersion described in U.S. Pat. No. 4,803,150. In the present disclosure, these methods can be combined as appropriate.
Preferred dyes include those described in the lower left column on page 4 to the upper right column on page 9 of JP-A No. 2-264944.
As the mordant layer, those described in the lower right column to the upper right column of page 14 of JP-A No. 2-264944 can be used.

14) Polyhydroxybenzenes Examples of polyhydroxybenzenes include those described in JP-A No. 3-39948, page 11, upper left column to page 12, lower left column, and European Patent Application Publication No. 452772A.
Specific examples thereof include the compound of general formula (III) described in the upper left column of page 11 of JP-A-8-39948, and specific compounds thereof, namely, compounds (III)-1 to -25 described in the lower left column of page 11 to the lower left column of page 12 of the same publication.
The amount of these polyhydroxybenzene compounds added may be less than 5×10 ⁻¹ mol per mol of silver halide, and preferably 5×10 ⁻³ to 1×10 ⁻¹ mol per mol of silver halide.

The silver halide photographic material according to the present disclosure is composed of a support, a silver halide emulsion layer (photosensitive layer) containing photosensitive silver halide grains, and at least one non-photosensitive hydrophilic colloid layer, such as an intermediate layer, surface protective layer, back layer, back surface protective layer, antihalation layer, or filter layer. However, there are no particular restrictions on the emulsion sensitization method or various additives used, and those described in, for example, JP-A No. 2-68539 can be suitably used.

15) Surface Protective Layer and Back Protective Layer The silver halide photographic light-sensitive material according to the present disclosure preferably has a surface protective layer and a back protective layer, which contain various chemicals with a hydrophilic colloid such as gelatin as a binder. When the main component of the layer is gelatin, a preservative or the like is necessary. Furthermore, it is preferable that the layer contains a matting agent, a lubricant, a plasticizer, an antistatic agent, a surfactant, a hardener, a thickener, a dye, a conductive substance, or the like, as needed.

16) Development Processing Method As a development processing method for the silver halide photographic light-sensitive material according to the present disclosure, the methods described in JP-A No. 2-103037, page 16, upper right column, line 7 to page 19, lower left column, line 15, JP-A No. 2-115837, page 3, lower right column, line 5 to page 6, upper column, line 10, and JP-A No. 2000-112078, page 34, left column, line 42 to page 35, left column, line 2 can be used. Furthermore, for thermally developable light-sensitive materials, the methods described in JP-A No. 2001-255617, page 37, left column, line 40 to page 35, left column, line 43 can be used.

One embodiment of the silver halide photographic material according to this disclosure is a photosensitive heat-developable photographic material. The technology for this is described in paragraphs 16 to 189 of Japanese Patent No. 5,623,921. In this embodiment, the desired effect can be achieved when the surfactants described in paragraphs 181 to 183 of the publication are those described in this application.

(Diffusion transfer type silver halide photographic material)
The diffusion transfer type silver halide photographic light-sensitive material according to the present disclosure has a support and a layer on the support, the layer containing an ionic compound having an anionic structure represented by the following formula 1 (the ionic compound according to the present disclosure):

In formula 1,
w represents an integer of 1 or more;
x represents an integer of 2 or more;
Sil ₁ represents a substituent containing at least three or more Si atoms, and multiple Sil _1s may be the same or different;
L ₁ represents a divalent linking group, and multiple L ₁ may be the same or different;
R represents an (x+w)-valent organic group containing a carbon atom.

Preferred embodiments of the ionic compound in the diffusion transfer type silver halide photographic light-sensitive material according to the present disclosure are the same as the preferred embodiments of the ionic compound according to the present disclosure described above.
The diffusion transfer type silver halide photographic light-sensitive material according to the present disclosure may contain one type of ionic compound according to the present disclosure alone, or two or more types.
The content of the ionic compound according to the present disclosure in the layer of the diffusion transfer type silver halide photographic light-sensitive material according to the present disclosure may be appropriately selected depending on the application, but is preferably 0.0001% by mass to 50% by mass, more preferably 0.001% by mass to 20% by mass, and particularly preferably 0.01% by mass to 10% by mass, relative to the total mass of the layer.

The layer may be any layer constituting the diffusion transfer type silver halide photographic light-sensitive material described below. Preferably, it is a layer that forms an air-liquid interface during coating, and more preferably, it is the outermost layer of the finally laminated light-sensitive material. Specifically, it is an intermediate layer in a substrate for a light-sensitive sheet, the outermost layer of a substrate, an intermediate layer in a light-sensitive sheet, a protective layer, a temperature compensation layer in a cover sheet, etc. Among these, the outermost layer of a substrate in a substrate for a light-sensitive sheet, a protective layer in a light-sensitive sheet, and a temperature compensation layer in a cover sheet are particularly preferred.
Furthermore, in the diffusion transfer type silver halide photographic light-sensitive material according to the present disclosure, the layer containing the ionic compound according to the present disclosure may be one layer or two or more layers.
The above layer may contain various components contained in the diffusion transfer type silver halide photographic light-sensitive material described below.

The diffusion transfer type silver halide photographic light-sensitive material according to the present disclosure preferably comprises a light-sensitive sheet, a transparent cover sheet, and an alkaline processing composition-containing material spread between them.

[1] Alkali Processing Composition-Containing Body The alkali processing composition-containing body is uniformly spread on the photosensitive sheet after exposure to light, and has the functions of developing the photosensitive layer and, together with a light-shielding layer provided on the back side of the transparent support of the photosensitive sheet or in the photosensitive sheet, completely shielding the photosensitive layer from external light. Therefore, the alkali processing composition-containing body typically contains, in addition to alkali, a thickener, a light-shielding agent, and a developing agent, a development accelerator for controlling development, a development inhibitor for preventing deterioration of the developing agent, and an antioxidant for preventing deterioration of the developing agent.

(a) Alkali The alkali is not particularly limited as long as it can adjust the pH of the solution to 12 or higher. Examples of alkalis include alkali metal hydroxides (e.g., sodium hydroxide, potassium hydroxide, and lithium hydroxide), alkali metal phosphates (e.g., potassium phosphate), guanidines, and quaternary amine hydroxides (e.g., tetramethylammonium hydroxide). Among these, potassium hydroxide and sodium hydroxide are preferred.

(b) Developing Agent Any developing agent may be used as long as it cross-oxidizes the dye image-forming compound and does not substantially produce stains even when oxidized. A single developing agent may be used, or two or more developing agents may be used, or they may be used in the form of a precursor. Examples of developing agents include aminophenols and pyrazolidinones. Of these, pyrazolidinones are particularly preferred because they cause less staining. Specific examples of pyrazolidinones include 1-phenyl-3-pyrazolidinone, 1-p-tolyl-4,4-dihydroxymethyl-3-pyrazolidinone, 1-(3'-methyl-phenyl)-4-methyl-4-hydroxymethyl-3-pyrazolidinone, 1-phenyl-4-methyl-4-hydroxymethyl-3-pyrazolidinone, and 1-p-tolyl-4-methyl-4-hydroxymethyl-3-pyrazolidinone. The developing agent may be incorporated into the alkaline processing composition-containing material, or may be added to an appropriate layer of the photosensitive sheet.

(c) Light-blocking agent Any material having a light-blocking function can be used as a light-blocking agent without any particular limitation. Examples of light-blocking agents include carbon black and the decomposable dyes described in U.S. Pat. No. 4,615,966. Of these light-blocking agents, carbon black is preferred. Carbon black is not limited to carbon black obtained by a specific manufacturing method, and may be obtained by any manufacturing method. Examples of methods for manufacturing carbon black include the channel method described in Donnel Voet "Carbon Black" MarcelDekker, Inc. (1976), as well as the thermal method and the furnace method.

When using carbon black as a light-blocking agent, it is preferable to prepare the carbon black in an aqueous dispersion beforehand. Aqueous dispersions of carbon black are widely used in paints, inks, cosmetics, and photographic materials, as black materials, or light-blocking materials. To prepare an aqueous dispersion of carbon black, carbon black is added to water containing a suitable dispersant, and the carbon black is coarsely dispersed using a coarse disperser (e.g., a high-speed agitator such as the Dissolver described in Japanese Patent Application No. 54-36045) to achieve an average particle size of approximately 10 μm to 100 μm. The particle size is then further reduced using a fine disperser (e.g., a sand grinder, homogenizer, colloid mill, etc.). This process yields an aqueous dispersion of carbon black with an average particle size of approximately 0.1 μm to 10 μm. Alternatively, as described in Japanese Patent Application Laid-Open No. 58-52362, carbon black may be dispersed in an aqueous solution containing an organic solvent, followed by removal of the organic solvent to obtain an aqueous dispersion of carbon black.

Preferred dispersants include those described on pages 255-257 and 501-539 of "Dispersion Technology Comprehensive Data Collection" (Business Development Center Publishing Division). An example of a commercially available dispersant is Demol N (trade name, manufactured by Kao Corporation).

The type and/or amount of dispersant affects the sodium ion content, which will be described later. The type and/or amount of dispersant must be determined so as to satisfy (a) the condition of providing sufficient dispersibility to the light-blocking agent, as well as (b) the condition of sodium ion content. To satisfy both the conditions of dispersibility and sodium ion content, it is preferable to set the amount of dispersant to 2% to 100% by mass relative to the light-blocking agent.

(d) Optical Density The optical density of the alkali treatment composition-containing body is preferably 47 or more, more preferably 50 or more, and particularly preferably 55 or more. When the optical density is 47 or more, sufficient light-shielding properties are obtained and spot fogging is suppressed. It is preferable to determine the amount of the light-shielding agent to be blended so that the optical density is 47 or more. Although it depends on the type of light-shielding agent used, it is preferable to set the amount of the light-shielding agent to about 10% by mass to 40% by mass in order to achieve an optical density of 47 or more.

(e) Sodium ion content The sodium ion content of the alkaline treatment composition-containing material in a spread state is preferably 0.4 g/ ^m2 or less. The sodium ion content is more preferably 0.35 g/ ^m2 or less, and particularly preferably 0.25 g/ ^m2 or less.

The content of sodium ions is mainly determined by the dispersant for the light-blocking agent and the thickener.
Sodium carboxymethylcellulose is particularly preferred as a thickener. Sodium carboxymethylcellulose has sufficient spreadability and stability. The sodium ion content can be reduced by using polyvinyl alcohol, hydroxyethyl cellulose, or an alkali metal salt of carboxymethylcellulose other than sodium as a thickener. However, these do not have sufficient spreadability and stability, so their use alone is not appropriate. Therefore, it is preferable to use sodium carboxymethylcellulose primarily as a thickener, and to use polyvinyl alcohol, hydroxyethyl cellulose, or an alkali metal salt of carboxymethylcellulose other than sodium in combination.

It is preferable to adjust the degree of etherification of sodium carboxymethylcellulose and the amount added so that the sodium ion content in the developed state is 0.4 g/ ^m2 or less. The degree of etherification of sodium carboxymethylcellulose is preferably 0.5 to 2.7, and more preferably 1.0 to 2.4. The amount of sodium carboxymethylcellulose added is preferably 1% by mass to 15% by mass, and more preferably 2% by mass to 10% by mass.

An alkaline processing composition-containing material that satisfies the above-mentioned optical density and sodium ion content exhibits excellent light-blocking properties and dye transfer properties even when spread thinly on a photosensitive sheet. In this specification, "thinly spread" means that the alkaline processing composition-containing material is spread to a thickness of 10 μm to 80 μm on the photosensitive sheet. A preferred spread thickness is 10 μm to 70 μm, and a more preferred spread thickness is 20 μm to 60 μm.

[2] Photosensitive Sheet (a) First Transparent Support The support of the photosensitive sheet may be any of those commonly used for photographic materials. The support of the integrated color diffusion transfer film unit must be transparent. The support is preferably smooth. Examples of support materials include cellulose acetate, polystyrene, polyethylene terephthalate, and polycarbonate. To prevent light piping, the support preferably contains a trace amount of dye or pigment such as titanium oxide. The thickness of the support of the photosensitive sheet is preferably 25 μm to 350 μm, more preferably 50 μm to 210 μm, and particularly preferably 70 μm to 150 μm. A primer layer (undercoat layer) is preferably provided on the front side of the support. Furthermore, a curl-balancing layer or an oxygen-blocking layer can be provided on the back side of the support as needed. The oxygen-blocking layer can be provided by referring to the description in JP-A-56-78833.

(b) Image-receiving layer The image-receiving layer (dye image-receiving layer) of the photosensitive sheet preferably contains a mordant and a hydrophilic colloid. The image-receiving layer may be a single layer or may be a laminate of layers having different mordanting powers. Single-layer and multi-layer image-receiving layers can be provided by referring to the description in JP-A-61-252551.

The mordant is preferably a polymer mordant. Polymer mordants include polymers containing secondary and/or tertiary amino groups, polymers having a nitrogen-containing heterocyclic moiety, and polymers containing a quaternary cation, and preferably have a molecular weight of 5,000 or more, particularly preferably 10,000 or more. The coating amount of the mordant is preferably 0.5 g/m ² to 10 g/m ² , more preferably 1 g/m ² to 5 g/m ² , and particularly preferably 2 g/m ² to 4 g/m ² .

Hydrophilic colloids include gelatin, polyvinyl alcohol, polyacrylamide, polyvinylpyrrolidone, etc. The preferred hydrophilic colloid is gelatin.

The image receiving layer may contain a discoloration inhibitor. There are no particular restrictions on the discoloration inhibitor, but those described in, for example, JP-A Nos. 62-30620, 62-30621, and 62-215272 can be used.
The thickness of the image receiving layer may be the same as that of an ordinary color diffusion transfer film unit.

(c) White Reflective Layer The white reflective layer of the photosensitive sheet forms a white background for the color image and usually contains a white pigment and a hydrophilic binder.

The whiteness of the white reflective layer is determined by the type of pigment, the mixing ratio of the pigment to the binder, and the coating amount of the pigment. When the white pigment is titanium dioxide, the content of titanium dioxide is preferably 5 g/m ² to 40 g/m ² , more preferably 10 g/m ² to 25 g/m ² .

The light reflectance of the white reflective layer is preferably 70% or higher, and more preferably 78% to 85% for light with a wavelength of 540 nm.

Examples of white pigments include barium sulfate, zinc oxide, barium stearate, silver flakes, silicates, alumina, zirconium oxide, sodium zirconium sulfate, kaolin, mica, and titanium dioxide. Non-film-forming polymer particles such as polystyrene can also be used as white pigments. Of these, titanium dioxide is preferred, with rutile titanium dioxide being particularly preferred. White pigments may be used alone or in combination of two or more types. Using two or more types of white pigments makes it easier to achieve a desired reflectance value for the white reflective layer.

White pigments that are surface-treated with alumina, silica, zinc oxide, etc. are preferred, with the amount of surface treatment being 5% or more being more preferred. A white reflective layer containing surface-treated white pigment exhibits high reflectivity.

Commercially available examples of titanium dioxide include DuPont's Ti-pure R931 (trade name) and those described in Research Disclosure (RD) No. 15162.

Hydrophilic binders include alkali-permeable polymer matrices such as gelatin and polyvinyl alcohol, and cellulose derivatives such as hydroxyethyl cellulose and carboxymethyl cellulose. When the binder is gelatin, the mass ratio of the white pigment to the gelatin is preferably 1/1 to 20/1, and more preferably 5/1 to 10/1.

The white reflective layer preferably contains an anti-fading agent. There are no particular restrictions on the anti-fading agent, but for example, those described in Japanese Patent Publication Nos. 62-30620 and 62-30621 can be used.

(d) Light-shielding layer The light-shielding layer is provided between the white reflective layer and the photosensitive layer. The light-shielding layer preferably contains a light-shielding agent and a hydrophilic binder.

The light-blocking agent may be one of those listed in (c) Light-blocking agent in [1] Alkaline processing composition-containing substance above. The amount of light-blocking agent contained will vary depending on the sensitivity of the photosensitive material to be blocked, but an optical density of about 5 to 10 is generally preferred.

The binder for the light-shielding layer can be any material that can disperse a light-shielding agent such as carbon black. A preferred binder is gelatin.

There are no particular restrictions on the thickness of the light-shielding layer, as long as it provides sufficient light-shielding ability and does not make the photosensitive sheet too thick.

(e) Photosensitive layer The photosensitive layer is adjacent to the light-shielding layer and preferably contains a dye image-forming compound and a silver halide emulsion. The photosensitive layer may be a multilayer consisting of a silver halide emulsion layer and a dye image-forming compound layer, or a single layer containing both a silver halide emulsion and a dye image-forming compound. The multilayer case will be explained below, but the same applies to a single layer case.

(f) Dye Image-Forming Compounds Dye image-forming compounds include yellow dye-forming compounds, magenta dye-forming compounds, and cyan dye-forming compounds.
Specific examples of yellow dye-forming compounds are described in U.S. Pat. Nos. 3,597,200, 3,309,199, 4,013,633, 4,245,028, 4,156,609, 4,139,383, 4,195,992, 4,148,641, 4,148,643, 4,336,322, JP-A-51-114930, JP-A-56-71072, Research Disclosure 17630 (1978), and Research Disclosure 16475 (1977).

Specific examples of magenta dye-forming compounds are disclosed in U.S. Pat. Nos. 3,453,107, 3,544,545, 3,932,380, 3,931,144, 3,932,308, 3,954,476, 4,233,237, 4,255,509, 4,250,246, and 4,142,891. These are described in the fine print, U.S. Patent No. 4,207,104, U.S. Patent No. 4,287,292, Japanese Patent Application Laid-Open Nos. 52-106727, 53-23628, 55-36804, 56-73057, 56-71060, 55-134, 7-120901, 8-286343, 8-286344, and 8-292537, among others.

Specific examples of cyan dye-forming compounds are those described in U.S. Pat. Nos. 3,482,972, 3,929,760, 4,013,635, 4,268,625, 4,171,220, 4,242,435, 4,142,891, 4,195,994, 4,147,544, 4,148,642, and British Patent No. 1,551,111. These are described in Patent Publication No. 38, JP 54-99431 A, JP 52-8827 A, JP 53-47823 A, JP 53-143323 A, JP 54-99431 A, JP 56-71061 A, European Patent (EP) No. 53,037, European Patent (EP) No. 53,040, Research Disclosure No. 17,630 (1978), and Research Disclosure No. 16,475 (1977), among others.

Dye image-forming compounds that form dyes by coupling can also be used as dye image-forming compounds. Examples of dye image-forming compounds that form dyes by coupling are described in JP-A Nos. 8-286340, 9-152705, 10-186564, and 10-293388, etc.

Positive dye image-forming compounds can also be used. Examples of positive dye image-forming compounds are described in JP-A Nos. 4-156542, 4-155332, 4-172344, 4-172450, 4-318844, 4-356046, 5-45824, 5-45825, 5-53279, 5-107710, 5-241302, 5-107708, 5-232659, and U.S. Pat. No. 5,192,649, among others. Positive dye image-forming compounds are preferably combined with negative silver halide emulsions, as described below.

Positive dye image-forming compounds can be dispersed using the method described on pages 144 to 146 of JP-A No. 62-215272. The dispersion may also contain compounds described on pages 137 to 144 of JP-A No. 62-215272. Specific examples of these dye image-forming compounds include the following compounds. In the following compounds, Dye represents a dye group, a dye group temporarily short-waved, or a dye precursor group.

(g) Silver halide emulsions The silver halide emulsion may be a negative type silver halide emulsion in which a latent image is formed mainly on the surface of the silver halide grains, or an internal latent image type direct positive silver halide emulsion in which a latent image is formed inside the silver halide grains. Internal latent image type direct positive silver halide emulsions include, for example, so-called "conversion type emulsions" which are made by utilizing the difference in solubility of silver halide, and "core/shell type emulsions" which are made by doping metal ions or chemically sensitizing, or both, silver halide core grains, and at least the photosensitive sites of the core grains are covered with an outer shell of silver halide. These emulsions are described in U.S. Pat. These compounds are described in the specifications of, for example, British Patent Nos. 2,592,250, 3,206,313, British Patent No. 1,027,146, U.S. Patent Nos. 3,761,276, 3,935,014, 3,447,927, 2,297,875, 2,563,785, 3,551,662, 4,395,478, West German Patent No. 2,728,108, and U.S. Patent No. 4,431,730.

When an internal latent image type direct positive silver halide emulsion is used, it is necessary to provide surface fog nuclei after imagewise exposure using light or a nucleating agent. Examples of nucleating agents include hydrazines described in U.S. Pat. Nos. 2,563,785 and 2,588,982, hydrazines and hydrazones described in U.S. Pat. No. 3,227,552, heterocyclic quaternary salt compounds described in British Patent No. 1,283,835, JP-A-52-69613, U.S. Pat. Nos. 3,615,615, 3,719,494, 3,734,738, 4,094,683 and 4,115,122, and heterocyclic quaternary salt compounds having a nucleating substituent in the dye molecule described in U.S. Pat. No. 3,718,470. Sensitizing dyes, thiourea-bonded acylhydrazine compounds described in U.S. Pat. Nos. 4,030,925, 4,031,127, 4,245,037, 4,255,511, 4,266,013, 4,276,364, and British Patent No. 2,012,443, and acylhydrazine compounds having a heterocyclic group (such as a thioamide ring, a triazole ring, or a tetrazole ring) bonded as an adsorptive group described in U.S. Pat. Nos. 4,080,270, 4,278,748, and British Patent No. 2,011,391B can be used.
In order to decrease the sensitivity of the re-reversal negative image and increase the reversal positive sensitivity, it is also preferable to use the metal complexes described in JP-A Nos. 2002-40607 and 2003-107616.
As a preferred method for producing a negative silver halide emulsion, the method described in JP-A No. 2006-113291 can be preferably used.

Spectral sensitizing dyes can be used in combination with silver halide emulsions. Specific examples are described in JP-A-59-180550, JP-A-60-140335, RD17029, and U.S. Pat. Nos. 1,846,300, 2,078,233, 2,089,129, 2,165,338, 2,231,658, 2,917,516, 3,352,857, 3,411,916, 2,295,276, and U.S. Pat. These are described in the specifications of U.S. Patent Nos. 2,481,698, 2,688,545, 2,921,067, 3,282,933, 3,397,060, 3,660,103, 3,335,010, 3,352,680, 3,384,486, 3,623,881, 3,718,470, and 4,025,349.

(h) Structure of Photosensitive Sheet The photosensitive sheet preferably has at least three silver halide emulsion layers having different color sensitivities and at least two color-mixing prevention layers each containing a non-diffusible reducing agent and positioned between the silver halide emulsion layers.
In order to impart different color sensitivities to at least three silver halide emulsion layers, it is effective and preferable to use the above-mentioned spectral sensitizing dyes having different absorption wavelength distributions.
When imparting different color sensitivities to silver halide emulsions, it is preferable that the spectral sensitivity distributions of the emulsions do not overlap as much as possible, but they do not need to be completely separated. When at least three silver halide emulsion layers are present, the color sensitivities can be considered to be different when the sensitivity of one emulsion layer at a specific wavelength is at least twice that of at least two other silver halide emulsion layers. It is desirable that the sensitivity of one emulsion layer at a specific wavelength be at least five times, more preferably at least ten times, that of at least two other silver halide emulsion layers. There are no particular restrictions on the specific wavelengths required to achieve this relationship, and any of the visible, ultraviolet, and infrared regions may be used. However, it is preferred that the silver halide emulsions in the at least three silver halide emulsion layers be selected from those sensitive to blue, green, red, or infrared.

The emulsion and dye image-forming compound may be in separate layers, or the emulsion and dye image-forming compound may be contained in a single layer. If the dye image-forming compound, when coated, has absorption in the spectral sensitivity range of the emulsion with which it is combined, a separate layer is preferred.

The emulsion layer may be composed of emulsions with different sensitivities. Furthermore, any layer may be provided between the emulsion layer and the dye image-forming compound layer. For example, the density of the color image can be increased by providing a layer containing a nucleating development accelerator, as described in JP-A-60-173541, or a partition wall layer, as described in JP-B-60-15267. The sensitivity of the photosensitive sheet can be increased by providing a reflective layer. The reflective layer is a layer containing a white pigment and a hydrophilic binder, with titanium oxide being preferred as the white pigment and gelatin being preferred as the hydrophilic binder. The coating amount of titanium oxide is preferably 0.1 g/m ² to 8 g/m ² , and more preferably 0.2 g/m ² to 4 g/m ^2. Examples of reflective layers are described in JP-A-60-91354.

In the case of a multilayer photosensitive layer, it is preferable to arrange a blue-sensitive emulsion combination unit, a green-sensitive emulsion combination unit, and a red-sensitive emulsion combination unit in that order from the exposed side. Optional layers can be provided between each emulsion layer unit as needed.

(i) Color-mixing prevention layer In order to prevent the undesirable influence of the development effect of one emulsion layer on other emulsion layer units, it is preferable to have a color-mixing prevention layer containing a non-diffusible reducing agent located between emulsion layers. At least one color-mixing prevention layer is required between each emulsion layer, so it is preferable that the photosensitive sheet has at least two color-mixing prevention layers.

As the non-diffusible reducing agent used in the color-mixing prevention layer, any known compound can be preferably used.
For example, it is preferable to use high molecular weight redox compounds described in JP-A-5-333501, phenidone and hydrazine compounds described in WO 98/33760 and U.S. Pat. No. 4,923,787, and redox compounds described in German Patent Application Publication No. 19618786A1, European Patent Application Publication No. 839623A1, European Patent Application Publication No. 842975A1, German Patent Application Publication No. 19806846A1, and French Patent Application Publication No. 2760460A1. It is also preferable to use lactones described in JP-A-2000-122243.
Particularly preferred non-diffusible reducing agents for use in the color-mixing prevention layer are selected from non-diffusible hydroquinone derivatives, sulfonamidophenol derivatives, sulfonamido naphthol derivatives, and lactones. Non-diffusible hydroquinone derivatives are particularly preferred, with dialkylhydroquinone derivatives being particularly preferred. The alkyl group includes substituted or unsubstituted alkyl groups, and the substituents are not particularly limited as long as they do not impair the "non-diffusibility" of the compound. Specific examples include aryl groups, acyl groups, alkoxycarbonyl groups, and aryloxycarbonyl groups. The total number of carbon atoms in the "dialkyl group" is preferably 12 or more, and more preferably 16 or more.

The molecular weight of the non-diffusible reducing agent is preferably 350 or more, more preferably 390 or more, and particularly preferably 500 or more. When the color-mixing inhibitor is a polymer, the molecular weight is expressed as a number-average molecular weight. The upper limit of the molecular weight of the non-diffusible reducing agent is not particularly limited when the non-diffusible reducing agent is a polymer, but when it is a compound other than a polymer, it is preferably about 1,000 or less. The optimal amount of non-diffusible reducing agent contained in at least two color-mixing prevention layers disposed between each silver halide emulsion layer varies depending on the coating amount, shape, grain size, and target maximum color density of the silver halide emulsion used. However, too much non-diffusible reducing agent results in a decrease in color density and a delay in image formation time, while too little results in cloudy color hues. Therefore, the amount of non-diffusible reducing agent should be determined taking these factors into consideration. The decrease in color density resulting from a reduction in the coated silver amount can be effectively suppressed by setting the coating amount of silver halide to the non-diffusible reducing agent at a specific ratio and using a specific amount of negative-working silver halide emulsion as the silver halide emulsion. The total coating molar amount of silver halide is 5 to 10 times the total coating molar amount of the non-diffusible reducing agent used in the color-mixing preventing layer. The total coating molar amount of the non-diffusible reducing agent is preferably in the range of ^0.5 to 1.5 mmol/ ^m2 , more preferably in the range of ^0.8 to 1.2 mmol/ ^m2 .
Specific examples of non-diffusible reducing agents are given below, but the present disclosure is not limited to these.

The non-diffusible reducing agent is preferably dissolved in a high-boiling organic solvent and present in the color-mixing prevention layer as fine oil droplets obtained by emulsification and dispersion. The high-boiling organic solvent preferably has a dielectric constant in the range of 4.0 to 8.0. The high-boiling organic solvent may be a mixture of two or more types. Examples of preferred high-boiling organic solvents include esters such as phthalates and phosphates, organic acid amides, and ketones. The dielectric constant was measured using the transformer bridge method (TRS-10T, manufactured by Ando Electric Co., Ltd.) at 25°C and 10 kHz. The high-boiling organic solvent preferably has a boiling point of 140°C or higher and a melting point of 100°C or lower, and more preferably a boiling point of 160°C or higher and a melting point of 70°C or lower. The high-boiling organic solvent may be solid at room temperature; in this case, the dielectric constant is the value measured in liquid form (supercooled state). The amount (mass ratio) of the high-boiling organic solvent to the non-diffusible reducing agent used in the color-mixing prevention layer is preferably 0.3 to 20, more preferably 0.5 to 10, and even more preferably 1 to 8.

There are no particular restrictions on the thickness of the photosensitive layer, as long as it provides sufficient color reproduction and does not make the photosensitive sheet too thick.

(j) Others The photosensitive sheet may have an anti-irradiation layer, a UV absorber layer, a protective layer, etc., as required.
The thickness of the photosensitive sheet is not particularly limited as long as it does not make the color diffusion transfer film unit too thick.

[3] Transparent Cover Sheet (a) Second Transparent Support The support for the transparent cover sheet may be any smooth transparent support commonly used in photographic materials. Preferred supports include cellulose acetate, polystyrene, polyethylene terephthalate, polycarbonate, etc. The support preferably contains a trace amount of dye to prevent light piping. It is also preferred to provide an undercoat layer on the support.

(b) Layer with Neutralizing Function The layer with neutralizing function (neutralizing layer) is a layer containing an acidic substance in an amount sufficient to neutralize the alkali introduced from the alkaline processing composition-containing body. If necessary, it may have a multilayer structure comprising layers such as a neutralization rate adjusting layer (neutralization timing layer) and an adhesion enhancing layer.

Preferred acidic substances are substances containing acidic groups with a pKa of 9 or less (or precursor groups that generate acidic groups with a pKa of 9 or less upon hydrolysis), and more preferred acidic substances are higher fatty acids such as oleic acid as described in U.S. Pat. No. 2,983,606; polymers of acrylic acid, methacrylic acid, or maleic acid and their partial esters or acid anhydrides as disclosed in U.S. Pat. No. 3,362,819; copolymers of acrylic acid and acrylic acid esters as disclosed in French Patent No. 2,290,699; and latex-type acidic polymers as disclosed in U.S. Pat. No. 4,139,383 and RD No. 16102 (1977). In addition, acidic substances disclosed in U.S. Patent No. 4,088,493, JP-A-52-153739, JP-A-53-1023, JP-A-53-4540, JP-A-53-4541, JP-A-53-4542, etc. are also preferred.

Other examples of acidic polymers include copolymers of vinyl monomers such as ethylene, vinyl acetate, and vinyl methyl ether with maleic anhydride and its n-butyl ester, copolymers of butyl acrylate and acrylic acid, cellulose, and acetate hydrogen phthalate.

Acidic polymers can be used in combination with hydrophilic polymers. Examples of hydrophilic polymers include polyacrylamide, polymethylpyrrolidone, polyvinyl alcohol (including partially saponified products), carboxymethyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, and polymethyl vinyl ether. Of these, polyvinyl alcohol is preferred. Acidic polymers can also be mixed with polymers other than hydrophilic polymers, such as cellulose acetate.

The amount of acidic polymer applied is determined by the amount of alkali in the alkaline processing composition. The equivalent ratio of acidic polymer to alkali per unit area is preferably 0.9 to 2.0. If the amount of acidic polymer is too small, the hue of the transferred dye will change and staining will occur on the white background. If the amount is too large, problems such as changes in hue or reduced lightfastness will occur. A more preferable equivalent ratio is 1.0 to 1.3. If the amount of hydrophilic polymer mixed is too large or too small, photographic quality will be reduced. The mass ratio k of hydrophilic polymer to acidic polymer is preferably 0.01 to 10, more preferably 0.1 to 3.0.

Additives can be incorporated into the neutralization layer for various purposes. For example, common film-hardening agents can be added to the neutralization layer, or polyhydroxyl compounds such as polyethylene glycol, polypropylene glycol, and glycerin can be added to improve the brittleness of the film. Other additives that can be added as needed include antioxidants, fluorescent brighteners, development inhibitors, and their precursors.

Neutralization timing layers used in combination with the neutralization layer include, for example, polymers that reduce alkali permeability such as gelatin, polyvinyl alcohol, partially acetalized polyvinyl alcohol, cellulose acetate, and partially hydrolyzed polyvinyl acetate; latex polymers that increase the activation energy of alkali permeation by copolymerizing small amounts of hydrophilic comonomers such as acrylic acid monomers; and polymers with lactone rings.

Among these, timing layers using cellulose acetate are disclosed in JP-A-54-136328, U.S. Pat. No. 4,267,262, U.S. Pat. No. 4,009,030, U.S. Pat. No. 4,029,849, etc.; acrylic resins are disclosed in JP-A-54-128335, JP-A-56-69629, JP-A-57-6843, U.S. Pat. No. 4,056,394, U.S. Pat. No. 4,061,496, U.S. Pat. No. 4,199,362, U.S. Pat. No. 4,250,243, U.S. Pat. No. 4,256,827, U.S. Pat. No. 4,268,604, etc. Particularly useful polymers include latex polymers copolymerized with small amounts of hydrophilic comonomers such as acids; polymers containing monoacrylates or monomethacrylates of polyhydric alcohols as disclosed in JP-A-11-2890; polymers containing lactone rings as disclosed in U.S. Pat. No. 4,229,516; and polymers disclosed in JP-A-56-25735, JP-A-56-97346, JP-A-57-6842, EP-A-31,957-A1, EP-A-37,724-A1, and EP-A-48,412-A1.

In addition, the following documents can also be used:
U.S. Pat. Nos. 3,421,893, 3,455,686, 3,575,701, 3,778,265, 3,785,815, 3,847,615, 4,088,493, 4,123,275, 4,148,653, 4,201,587, 4,288,523, 4,297,431, West German Patent Application Publication (OLS) No. 1,622,936, West German Patent Application Publication No. 2,162,277, RD 15162, No. 151 (1976), and the like.

The neutralization timing layer may contain development inhibitors and/or their precursors as disclosed in U.S. Pat. No. 4,009,029, West German Patent Application (OLS) No. 2,913,164, West German Patent Application Publication No. 3,014,672, JP-A Nos. 54-155837 and 55-138745, hydroquinone precursors as disclosed in U.S. Pat. No. 4,201,578, other photographic additives or their precursors, etc. Furthermore, providing an auxiliary neutralization layer as described in JP-A Nos. 63-168648 and 63-168649 is effective in minimizing changes in transfer density over time after processing.

The neutralization timing layer may contain multiple of these materials. Multiple materials may be contained in a single layer, or multiple layers may each contain multiple materials.

(c) Other Layers The transparent cover sheet may have, in addition to the layer having a neutralizing function, layers having auxiliary functions such as a backing layer, a protective layer, and a filter dye layer.

The backing layer is provided to adjust curl and provide slippage. The backing layer may contain a filter dye. The protective layer is mainly used to prevent adhesion to the back surface of the cover sheet and to the protective layer of the photosensitive material when the photosensitive material and the cover sheet are superimposed.
If the transparent cover sheet contains a dye, the sensitivity of the photosensitive layer can be adjusted. A filter dye may be added to the support of the cover sheet, a layer having a neutralizing function, a backing layer, a protective layer, a capture mordant layer, etc. Alternatively, a layer containing only a filter dye may be provided.

The diffusion transfer type silver halide photographic light-sensitive material according to the present disclosure may contain other known additives in each layer.

The present disclosure will be described in more detail below with reference to examples. The materials, amounts used, ratios, processing details, processing procedures, etc. shown in the following examples can be appropriately changed without departing from the spirit of the present disclosure. Therefore, the scope of the present disclosure is not limited to the specific examples shown below.
In the examples, "%" and "parts" mean "% by mass" and "parts by mass", respectively, unless otherwise specified.

(Example S1)
<Synthesis of Intermediate 1>

A 300 mL three-neck flask equipped with a stirrer, a condenser, a nitrogen inlet tube, and a thermometer was charged with 19.62 g of diallyl fumarate and 71.3 g of 2-propanol (iPrOH), and the atmosphere was replaced with nitrogen. 10.4 g of sodium hydrogen sulfite (NaHSO ₃ ) diluted with 24.7 g of ion-exchanged water was added thereto, and the mixture was allowed to react in an oil bath at 90°C for 6 hours.
After 2-propanol and water were distilled off under reduced pressure, 150 g of ethyl acetate was added and stirred, and the precipitated solid was collected by filtration. The obtained solid was dispersed and washed in 150 g of ethyl acetate for 1 hour, filtered, and dried to obtain 20.5 g of a white solid of Intermediate 1. The white solid was confirmed to be Intermediate 1 by ¹ H-NMR.

<Synthesis of Compound A1-1Na>

2.30 g (7.65 mmol) of intermediate 1, 162 mg (1.50 mmol) of 1,5-cyclooctadiene (cod), and 18 mL of methanol (MeOH) were weighed into a three-neck flask equipped with a stirrer, a condenser, a nitrogen inlet tube, and a thermometer, and after purging with nitrogen, the mixture was stirred for 10 minutes at 45° C. 201 mg (0.30 mmol) of chloro(1,5-cyclooctadiene)iridium(I) dimer ([IrCl(cod)] ₂ ) was added and the mixture was stirred for an additional 10 minutes, after which 3.34 g (15.0 mmol) of 1,1,1,3,5,5,5-heptamethyltrisiloxane was added dropwise over 10 minutes. After the dropwise addition was completed, the reaction was carried out at 45°C for 2 hours, and ^1H -NMR spectroscopy confirmed that 1,1,1,3,5,5,5-heptamethyltrisiloxane had completely disappeared and the target compound A1-1Na had been produced. The methanol solvent was removed by distillation under reduced pressure, and the mixture was purified by silica gel column chromatography using ethyl acetate/methanol as a developing solvent, yielding 4.08g (yield 73%) of compound A1-1Na.
¹ H-NMR (MeOD): δ (ppm) = -0.11 ~ 0.12 ppm (42H), 0.36 ~ 0.48 ppm (4H), 1.50 ~ 1.66 ppm (4H), 2.85 ~ 3.15 ppm (4H), 3.52 ~ 4.08 ppm (5H)

(Example S2)
<Synthesis of Compound A1-2Na>

Compound A1-2Na was synthesized (yield 79%) in the same manner as compound A1-1Na, except that 3.34 g of 1,1,3,5,5,5-heptamethyltrisiloxane was used instead.
¹ H-NMR (MeOD): δ (ppm) = -0.10 ~ 0.10 ppm (42H), 0.42 ~ 0.56 ppm (4H), 1.54 ~ 1.70 ppm (4H), 2.85 ~ 3.15 ppm (4H), 3.90 ~ 4.10 ppm (5H)

(Example S3)
<Synthesis of Compound A1-3Na>

Compound A1-3Na was synthesized (yield 51%) in the same manner as in the synthesis of compound A1-1Na, except that 3.34 g of 1,1,3,5,5,5-heptamethyltrisiloxane was changed to 4.45 g of tris(trimethylsilyloxy)silane and the reaction was carried out at 60°C for 6 hours.
¹ H-NMR (MeOD): δ (ppm) = 0.02 ~ 0.20 ppm (54H), 0.44 ~ 0.58 ppm (4H), 1.60 ~ 1.80 ppm (4H), 2.98 ~ 3.24 ppm (4H), 3.96 ~ 4.22 ppm (5H)

(Example S4)
<Synthesis of Intermediate 2 and Intermediate 3>

A 1000 mL three-neck flask equipped with a stirrer, condenser, nitrogen inlet tube, and thermometer was charged with 499.0 g of ethyl acetate (AcOEt), 24.30 g of ion-exchanged water, and palladium/carbon (Pd/C, 5% palladium, approximately 55% water-wetted) and purged with nitrogen. The three-neck flask was placed in an ice bath, and 100.0 g of 1,1,1,3,5,5,5-heptamethyltrisiloxane was added dropwise over 30 minutes. After the dropwise addition, the mixture was returned to room temperature and allowed to react for 3 hours. After the reaction, the palladium/carbon was removed by filtration through Celite, and the mixture was concentrated under reduced pressure using a rotary evaporator to yield 100.5 g of a colorless, transparent liquid. The liquid was confirmed to be Intermediate 2 by ¹ H-NMR.
Next, 99.0 g of the obtained intermediate 2 and 285 g of toluene were added to a 500 mL three-neck flask equipped with a stirrer, a condenser, a nitrogen inlet tube, and a thermometer, and the three-neck flask was immersed in an ice bath. After confirming that the temperature had dropped below 5°C, 32.5 g of pyridine was added dropwise, and stirring was continued until the temperature returned to below 5°C. A separate solution was prepared by adding 18.4 g of toluene and 19.3 mL of dichloromethylsilane to a dropping funnel. The prepared solution was added dropwise to the three-neck flask over 30 minutes. After the addition was completed, the reaction solution was returned to room temperature and allowed to react for 3 hours. After the reaction, the precipitated solid was filtered off, and the resulting colorless, transparent liquid was subjected to a separation operation. The separation operation was performed twice using 350 mL of ion-exchanged water, and the organic layer was recovered. Magnesium sulfate was added to the organic layer, and the mixture was dehydrated for 30 minutes or more, followed by vacuum concentration using a rotary evaporator. Pulverized silica gel (Wakogel C-200, Fujifilm Wako Pure Chemical Industries, Ltd.) was added to the resulting liquid, which was then stirred and filtered under suction to obtain a colorless, transparent liquid. The liquid was confirmed to be intermediate 3 by ^1H -NMR.

<Synthesis of Compound A1-4Na>

Compound A1-4Na was synthesized (yield 74%) in the same manner as in the synthesis of Compound A1-1Na, except that 3.34 g of 1,1,3,5,5,5-heptamethyltrisiloxane was replaced with Intermediate 3 (7.79 g).
¹ H-NMR (MeOD): δ (ppm) = -0.12 ~ 0.10 ppm (90H), 0.42 ~ 0.56 ppm (4H), 1.54 ~ 1.70 ppm (4H), 2.85 ~ 3.15 ppm (4H), 3.84 ~ 4.12 ppm (5H)

(Examples 1-A to 1-D and Comparative Examples 1-A to 1-C: Evaluation of surface tension in aqueous solution)
A sample for surface tension measurement was prepared by mixing 0.4 parts by mass of the compound synthesized above or the comparative compound, 1,000 parts by mass of ion-exchanged water, and 10 parts by mass of methanol. The prepared sample was kept at 40°C, and the surface tension was measured by the Wilhelmy method using an automatic surface tensiometer DY-300 manufactured by Kyowa Interface Science Co., Ltd., with a platinum plate as a probe.
The measurement results are shown in Table 2.

Comparative compounds C-1 and C-2 listed in Table 2 are shown below.

(Examples 2-A to 2-H and Comparative Examples 2-A to 2-C: Preparation of Compositions for Image-Receiving Films, and Fabrication and Evaluation of Films)
As a coating liquid for the substrate-sixth layer, composition (PA) was prepared containing each component shown in Table 3 per 1,000 g of the finished coating liquid. The remaining component in composition (PA) was water.

The composition (PA) shown in Table 3 was coated so that the gelatin coating amount in Table 3 was 0.29 g/m ² .

Separately, a substrate was prepared by laminating a backing layer on a polyethylene terephthalate support, followed by laminating a substrate-1 layer and a substrate-2 layer. Four layers, from substrate-3 layer to substrate-6 layer, were simultaneously extruded onto the slide surface from a Giesser and coated onto this substrate at a coating speed of 60 m/min. After coating, the image-receiving film was stored at 25°C and 55% relative humidity for 7 days to harden. The sample thus obtained was designated image-receiving film substrate 101.
The composition of each layer is shown in Table 4 below.
In addition, to forcibly evaluate the stability against cissing during application, the composition (A) intentionally contains coarse particles with a diameter of 6 μm. The inclusion of foreign matter in the application environment or the peeling of foreign matter from the backing layer can cause cissing during application. The addition of the coarse particles is for the purpose of simulating this.

Compositions (P-B) to (P-K) were prepared by changing only the type of compound in composition (P-A), which is the coating liquid for the substrate-6th layer. Details are shown in Table 5 below. Image receiving film substrates 102 to 111 were also prepared in the same manner as image receiving film substrate 101, except that only the type of the coating liquid for the substrate-6th layer was changed.
The obtained samples were evaluated as follows.

Evaluation 1) Coating surface condition - Evaluation of cissing resistance -
The coated sample was visually observed over an area of 10 m ² to evaluate the frequency of cissing.
The frequency of cissing for each sample was evaluated as a percentage of the number of cissings on the image receiving film substrate (silver halide photographic light-sensitive material) 101.

The evaluation results are shown in Table 5.

Details of each component other than those mentioned above, listed by the abbreviations used in Tables 3 to 5, are shown below.
Surfactant (1): the following compound

Surfactant (3): The following compound

Surfactant (6): The following compound

Surfactant (7): The following compound

Additive (1): The following compound

Additive (5): The following compound

Additive (8): Carboxymethyl cellulose (CMC Cellogen 6A, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.)
Additive (10): the following compound

Additive (12): The following compound

Additive (18): The following compound

Matting agent (1): Polymethyl methacrylate spherical latex (average particle size 3 μm)
Matting agent (2): Polymethyl methacrylate spherical latex (average particle size 6 μm)
Hardener (1): the following compound Hardener (2): the following compound Hardener (4): the following compound

Polymer mordant (1): The following compound

UV absorber (2): the following compound UV absorber (3): the following compound

When a functional material (functional film) was produced using a composition containing the ionic compound disclosed herein, a functional film with excellent coating surface condition was obtained.

In preparing the above film substrate sample, a composition was prepared from the composition formulation of the substrate-sixth layer, with the matting agent and the leveling agent introduced by the matting agent removed, and a similar evaluation was performed. As a result, it was confirmed that a substrate in which the occurrence of cissing was suppressed could be formed using the sample using the ionic compound according to the present disclosure.

(Examples 3-A to 3-D and Comparative Examples 3-A to 3-C: Preparation of Compositions, Preparation and Evaluation of Silver Halide Photosensitive Materials)
<Preparation of substrate for photosensitive material>
As described in Table 3 of Examples 2-A to 2-H and Comparative Examples 2-A to 2-C, a back layer was laminated on a polyethylene terephthalate support, and then the substrate-1st layer to the substrate-6th layer were laminated thereon to obtain a laminate substrate (Subs-1).
In this case, the composition of the substrate-sixth layer was the same as that of the composition (A) of Comparative Example 2-A, but not containing the matting agent (2) and the surfactant derived from the matting agent (surfactant (3)). After coating, this laminate substrate (Subs-1) was stored for 7 days under environmental conditions of 25°C and a relative humidity of 55% RH.

<Preparation of photosensitive material>
A composition (QA) containing the components shown in Table 6 per 1,000 g of the finished coating solution was prepared as a coating solution for the 18th layer of the silver halide photosensitive material.

The composition (QA) shown in Table 6 above was coated so that the gelatin coating amount in Table 6 was 0.20 g/m ² .

On the substrate (Subs-1) prepared as described above, 18 layers (layers 1 to 18) were simultaneously extruded from a Giesser onto a slide surface and coated at a coating speed of 60 m/min. After coating, the photosensitive material was stored for 7 days under environmental conditions of 25°C and 55% RH relative humidity to allow the hardening reaction to proceed. The sample obtained in this manner was designated as Comparative Silver Halide Photosensitive Material 201.
The composition of each layer is shown in Tables 7 to 9.
In order to forcibly evaluate the stability against cissing during application, the composition (Q-A) intentionally contains coarse particles with a diameter of 6 μm. By intentionally adding coarse particles that are mixed in very rarely, it is possible to evaluate cissing over a small application area.

Furthermore, compositions (Q-B) to (Q-G) were prepared by changing the compounds in composition (Q-A) as shown in Table 12 below. Silver halide photographic materials 202 to 207 were each prepared in the same manner as silver halide photographic material 201, except that only the type of coating solution for the 18th layer was changed.

The obtained photosensitive material samples were evaluated as follows:

Evaluation) Coated Surface Condition The coated surface condition was evaluated based on two criteria: cissing and uniformity.

- Evaluation of repelling -
The coated sample was visually observed over an area of 10 m ² to evaluate the frequency of cissing.
The frequency of cissing in each sample was evaluated as a percentage of the number of cissing in the silver halide photographic light-sensitive material 201.

-Evaluation of uniformity-
When the coating solution was extruded from the Giesser onto the slide surface and applied to the support, the coating was forced by blowing air at about 2 m/sec against the slide surface to easily disturb the coated surface.
The coated photosensitive material was subjected to a uniform exposure and development process so that the density after processing would be gray, approximately 0.7. The image was visually observed over an area 10 cm wide and 1 m long to evaluate the uniformity of the coating. The evaluation was mainly focused on streaky unevenness. The evaluation criteria are as follows:
A: Unevenness caused by wind is not noticeable B: Unevenness caused by wind is almost not noticeable C: Unevenness caused by wind is slightly noticeable, but not a problem in practical use D: Streaky unevenness caused by wind is noticeable, and is a problem if the captured image is a uniform gray E: Streaky unevenness caused by wind is noticeable, and is a serious problem even if the captured image is not uniform and includes a pattern

The silver halide photographic material prepared above is a diffusion transfer type silver halide photographic material, and its processing method involves spreading a thin layer of processing solution between an exposed silver halide photographic material (photosensitive sheet) and a transparent cover sheet for development. The transparent cover sheet contains cellulose acetate and an acid polymer. The alkali in the processing solution causes hydrolysis of the cellulose acetate and increases the alkali's permeability. For approximately 10 minutes, the processing solution maintains a high pH, allowing development of the silver in the photosensitive material. Thereafter, neutralization by the acid polymer progresses, causing a rapid drop in pH within approximately 15 to 20 minutes, halting development. The processing solution was filled into a pressure-destructible container, and the container was destroyed with a roller to spread the processing solution to a thickness of 55 μm.
The composition of the transparent cover sheet is shown in Table 10, and the composition of the processing solution is shown in Table 11.
The evaluation results are shown in Table 12.

Details of each component other than those mentioned above, listed by the abbreviations used in Tables 6 to 12, are shown below.
Ultraviolet absorber (1): the following compound

Hardening agent (3): The following compound

Hardening agent (5): The following compound

Additive (2): The following compound

Additive (3): the following compound Additive (4): the following compound Additives (6) to (8): the following compounds Additive (9): polyvinyl alcohol (PVA-220E manufactured by Kuraray Co., Ltd., degree of polymerization approximately 2,000, degree of saponification 88%)
Additive (11): the following compound Additive (13): the following compound

Additive (14): The following compound

Additive (20): the following compound Additive (21): the following compound

Additive (22): The following compound

Additive (23): The following compound

Nucleating agent (1): The following compound

Surfactant (4): The following compound

Surfactant (5): The following compound

Compound (P-8): The following compound, Mw 33,700

High boiling point organic solvent (1): the following compound High boiling point organic solvent (2): the following compound

Yellow dye-releasing compound (1): the following compound Magenta dye-releasing compound (1): the following compound Cyan dye-releasing compound (1): the following compound

Cyan dye-releasing compound (2): The following compound

Temperature compensation polymer (1): the following compound Temperature compensation polymer (2): the following compound

Acid polymer (1): The following compound

Latent direct positive emulsions A-I: Prepared in accordance with the emulsion of Sample 101 in JP-A No. 2002-40607. Emulsion G for the fourth layer was prepared in accordance with emulsion RM12 described in paragraphs 0052-0053 and 0057-0061.

Sensitizing dyes (1) to (9): The following compounds

As shown in Table 12, when a composition containing an ionic compound according to the present disclosure is used in a coating solution for the outermost layer, a silver halide photographic material with excellent coated surface condition is obtained.

Example 4
Composition (R) was prepared by changing the composition formulation of the substrate-sixth layer used in the silver halide photographic light-sensitive material of Example 3-A. A substrate (Subs-2) containing an ionic compound according to the present disclosure was prepared in the same manner as in the substrate (Subs-1) with a functional layer, except that the composition of the sixth layer was changed to composition (R).
The multilayer photosensitive material compositions used in the silver halide photographic photosensitive materials 204 to 207 of Examples 3-A to 3-D were coated onto this substrate, and the same evaluations as in Example 3-A were carried out. As a result, it was found that samples containing an ionic compound according to the present disclosure in both the substrate and the photosensitive material laminated thereon exhibited excellent coated surface condition.

Composition (R) is an aqueous composition, and the remaining component in composition (R) listed in Table 15 is water.

(Example 5: Photothermographic material)
A sample was prepared in which the fluorine compound (F-29) in Sample 7 in the examples described in JP-A-2006-91780 was replaced with 10.0 mg/ ^m2 of the compound A1-1Na.
The resulting sample was visually observed for reflected light under a brightness of 500 lux, and the surface condition was observed according to the following evaluation criteria. The evaluation result was A, indicating that the coated surface condition was excellent.
A: No unevenness is noticeable.
B: The unevenness is barely noticeable.
C: A slight decrease in surface gloss is observed.
D: A level at which a decrease in surface gloss is clearly observed.

(Example 6: Photothermographic material)
In Example 1 described in Japanese Patent No. 6,851,389, the fluorosurfactants F-1 and F-2 (total of 1 part by mass) in the non-photosensitive back protective layer were replaced with a compound A1-1Na (10 parts by mass). Furthermore, the fluorosurfactants F-1 and F-2 (total of 1 part by mass) in the second surface protective layer were replaced with a compound A1-1Na (10 parts by mass). The surface condition of the prepared sample was evaluated using the same criteria as in Example 5, and the evaluation result was A, indicating that the coated surface condition was excellent.

(Example 7: Industrial X-ray photosensitive material)
A sample was prepared in which the coating aid-4 and coating aid-5 (total of 1 part by mass) in the surface protective layer of Example Sample No. 14 described in JP 2009-86332 A were replaced with a compound A1-1Na (10 parts by mass). The surface condition of the obtained sample was evaluated using the same criteria as in Example 5, and the evaluation result was A, indicating that the coated surface condition was excellent.

(Example 8: Thermal recording material)
In Comparative Example 4 described in WO 2016/194915, the N-propyl-N-polyoxyethylene-perfluorooctanesulfonic acid amide sodium butylsulfonate and potassium perfluorooctanesulfonate (total of 1 part by mass) in the BPC layer (back protective layer) were replaced with a combined compound A1-1Na (10 parts by mass). Furthermore, Surflon S231W (manufactured by Seimi Chemical Co., Ltd.) and Plysurf A217 (manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.) (total of 1 part by mass) in the protective layer were replaced with a combined compound A1-1Na (10 parts by mass). The surface condition of the prepared sample was evaluated using the same criteria as in Example 5, and the evaluation result was A, indicating that the coated surface condition was excellent.

The disclosure of Japanese Patent Application No. 2024-043969, filed on March 19, 2024, is incorporated herein by reference in its entirety.
All publications, patent applications, and technical standards mentioned in this specification are herein incorporated by reference to the same extent as if each individual publication, patent application, or technical standard was specifically and individually indicated to be incorporated by reference.

Claims (9)

An ionic compound having an anion structure represented by the following formula 1:

In formula 1,
w represents an integer of 1 or more;
x represents an integer of 2 or more;
Sil ₁ represents a substituent containing at least three or more Si atoms, and multiple Sil _1s may be the same or different;
L ₁ represents a divalent linking group, and multiple L ₁ may be the same or different;
R represents an (x+w)-valent organic group containing a carbon atom. The ionic compound according to claim 1, which is a compound represented by formula 2.

In formula 2,
w represents an integer of 1 or more;
x represents an integer of 2 or more;
Sil ₁ represents a substituent containing at least three or more Si atoms, and multiple Sil _1s may be the same or different;
L ₁ represents a divalent linking group, and multiple L ₁ may be the same or different;
R represents an (x+w)-valent organic group containing a carbon atom;
^M1 represents a monovalent to trivalent cation;
n represents an integer of 1 to 3, which is equal to the valence of ^M1 . The ionic compound according to claim 1 or claim 2, wherein w is 1. 3. The ionic compound according to claim 1, wherein the anion structure represented by formula 1 is a structure represented by any one of formulas a-1, a-2, and a-3 below:

In formula a-1 to formula a-3,
Sil ₁ represents a substituent containing at least three or more Si atoms, and multiple Sil _1s may be the same or different;
L ₁ represents a divalent linking group, and multiple L ₁ may be the same or different;
L _A represents a single bond or a divalent linking group;
b represents 1 or 2;
R _B represents a hydrogen atom or a hydrocarbon group;
L _B represents a single bond or a divalent linking group, and multiple L _Bs may be the same or different;
Lc ₁ represents a single bond or a divalent linking group, and multiple Lc _1s may be the same or different;
_Lc2 represents a single bond or a divalent linking group. 3. The ionic compound according to claim 1, wherein the Sil1 is a group represented by any one of the following formulae Si-1 to Si-4:

In formula Si-1 to formula Si-4,
R ₁ represents a hydrocarbon group, and multiple R ₁ may be the same or different;
y represents an integer of 2 or more;
_R2 represents a hydrocarbon group, and multiple _R2s may be the same or different;
z represents 2 or 3;
_R3 represents a hydrocarbon group, and multiple _R3s may be the same or different;
p and q represent integers satisfying p≧1, q≧1, and p+q≧3;
R ₄ , R _4a and R _4b each represent a hydrocarbon group, and a plurality of R _{4 s} , R _4a and R _4b may be the same or different;
* indicates the bonding position to _L1 . an ionic compound having an anionic structure represented by the following formula 1;
A composition comprising: a binder.

In formula 1,
w represents an integer of 1 or more;
x represents an integer of 2 or more;
Sil ₁ represents a substituent containing at least three or more Si atoms, and multiple Sil _1s may be the same or different;
L ₁ represents a divalent linking group, and multiple L ₁ may be the same or different;
R represents an (x+w)-valent organic group containing a carbon atom. A support;
A functional material comprising: a layer on the support, the layer containing an ionic compound having an anionic structure represented by the following formula 1:

In formula 1,
w represents an integer of 1 or more;
x represents an integer of 2 or more;
Sil ₁ represents a substituent containing at least three or more Si atoms, and multiple Sil _1s may be the same or different;
L ₁ represents a divalent linking group, and multiple L ₁ may be the same or different;
R represents an (x+w)-valent organic group containing a carbon atom. A support;
a layer on the support, the layer containing an ionic compound having an anionic structure represented by the following formula 1:

In formula 1,
w represents an integer of 1 or more;
x represents an integer of 2 or more;
Sil ₁ represents a substituent containing at least three or more Si atoms, and multiple Sil _1s may be the same or different;
L ₁ represents a divalent linking group, and multiple L ₁ may be the same or different;
R represents an (x+w)-valent organic group containing a carbon atom. A support;
a diffusion transfer type silver halide photographic light-sensitive material comprising, on the support, a layer containing an ionic compound having an anionic structure represented by the following formula 1:

In formula 1,
w represents an integer of 1 or more;
x represents an integer of 2 or more;
Sil ₁ represents a substituent containing at least three or more Si atoms, and multiple Sil _1s may be the same or different;
L ₁ represents a divalent linking group, and multiple L ₁ may be the same or different;
R represents an (x+w)-valent organic group containing a carbon atom.