WO2024171841A1 - Coloring composition, film, optical filter, solid-state imaging element, image display device, and compound - Google Patents

Abstract

Provided is a coloring composition including a colorant, a resin, and a solvent, the colorant including a compound represented by Formula (1). Also provided are a film, an optical filter, a solid-state imaging element, and an image display device each using the coloring composition.

Description

Coloring composition, film, optical filter, solid-state imaging device, image display device, and compound

The present invention relates to a coloring composition, a film, an optical filter, a solid-state imaging device, an image display device, and a compound.

In recent years, the popularity of digital cameras and mobile phones with cameras has led to a large increase in demand for solid-state imaging elements such as charge-coupled device (CCD) image sensors. Color filters are used as key devices in displays and optical elements. Color filters usually have pixels of the three primary colors, red, green, and blue, and serve to separate transmitted light into the three primary colors.

The colored pixels of each color of the color filter are produced using a coloring composition containing a colorant. In addition, Patent Documents 1 and 2 describe coloring compositions for color filters that contain an isoindoline compound having a barbituric acid structure.

JP 2019-113671 A JP 2006-146078 A

In recent years, there has been a demand for further improvement in the heat resistance of optical filters such as color filters.

Therefore, an object of the present invention is to provide a coloring composition capable of forming a film having excellent heat resistance. Another object of the present invention is to provide a film, an optical filter, a solid-state imaging device, an image display device, and a compound.

The present invention provides the following:

<1> A coloring composition comprising a colorant, a resin, and a solvent,
The colorant comprises a coloring composition comprising a compound represented by formula (1);
In formula (1), L ¹ represents a group represented by formula (L-1):
A ¹ and A ² each independently represent a cyclic structure;
B ¹ and B ² each independently represent O, S, or a group represented by formula (B-1);
In formula (L-1), X ^L1 and X ^L2 each independently represent O or S;
C ¹ represents a fused ring structure or a 6- or more-membered monocyclic ring structure;
In formula (B-1), R ^B1 and R ^B2 each independently represent a hydrogen atom or a substituent.
R ^B1 and R ^B2 may be bonded to form a ring.
<2> The colored composition according to <1>, further comprising a photopolymerization initiator and a polymerizable compound.
<3> The colored composition according to <1> or <2>, in which X ^L1 and X ^L2 in the formula (L-1) are O.
<4> The colored composition according to <1> or <2>, wherein L ¹ is a group represented by any one of formulas (L-1) to (L-5):
<5> The colored composition according to any one of <1> to <4>, wherein the compound represented by the formula (1) is a yellow colorant.
<6> The colored composition according to any one of <1> to <5>, wherein the colorant further includes a green colorant or a red colorant.
<7> The colored composition according to any one of <1> to <6>, which is for forming a color filter.
<8> A film obtained by using the colored composition according to any one of <1> to <7>.
<9> A color filter having the film according to <8>.
<10> A solid-state imaging device having the film according to <8>.
<11> An image display device having the film according to <8>.
<12> A compound represented by formula (1);
In formula (1), L ¹ represents a group represented by formula (L-1):
A ¹ and A ² each independently represent a cyclic structure;
B ¹ and B ² each independently represent O, S, or a group represented by formula (B-1);
In formula (L-1), X ^L1 and X ^L2 each independently represent O or S;
C ¹ represents a fused ring structure or a 6- or more-membered monocyclic ring structure;
In formula (B-1), R ^B1 and R ^B2 each independently represent a hydrogen atom or a substituent.
R ^B1 and R ^B2 may be bonded to form a ring.

The present invention can provide a coloring composition capable of forming a film with excellent heat resistance. The present invention can also provide a film, an optical filter, a solid-state imaging device, an image display device, and a compound.

The present invention will be described in detail below.
In this specification, the use of "to" means that the numerical values before and after it are included as the lower limit and upper limit.
In the description of groups (atomic groups) in this specification, when there is no indication of whether they are substituted or unsubstituted, the term encompasses both unsubstituted groups (atomic groups) and substituted groups (atomic groups). For example, the term "alkyl group" encompasses not only alkyl groups that have no substituents (unsubstituted alkyl groups) but also alkyl groups that have substituents (substituted alkyl groups).
In this specification, unless otherwise specified, the term "exposure" includes not only exposure using light but also drawing using particle beams such as electron beams and ion beams. Examples of light used for exposure include the bright line spectrum of a mercury lamp, far ultraviolet light represented by an excimer laser, extreme ultraviolet light (EUV light), X-rays, active rays or radiation such as electron beams.
In this specification, "(meth)acrylate" refers to both or either of acrylate and methacrylate, "(meth)acrylic" refers to both or either of acrylic and methacrylic, and "(meth)acryloyl" refers to both or either of acryloyl and methacryloyl.
In this specification, in the structural formulae, Me represents a methyl group, Et represents an ethyl group, Bu represents a butyl group, and Ph represents a phenyl group.
In this specification, the weight average molecular weight and number average molecular weight are values calculated as polystyrene standards measured by GPC (gel permeation chromatography).
In this specification, the total solids content refers to the total mass of all components of the composition excluding the solvent.
In this specification, a pigment means a compound that is poorly soluble in a solvent.
In this specification, the term "process" refers not only to an independent process, but also to a process that cannot be clearly distinguished from other processes, as long as the process achieves its intended effect.

<Coloring composition>
The coloring composition of the present invention is a coloring composition containing a colorant, a resin, and a solvent,
The colorant is characterized by containing a compound represented by formula (1).

The compound represented by formula (1) has high planarity due to intramolecular hydrogen bonds, and is therefore presumed to easily form associations. For this reason, by using the coloring composition of the present invention, a film having excellent heat resistance can be formed.
In addition, since the compound represented by formula (1) has high planarity due to intramolecular hydrogen bonds, it is presumed that associations are easily formed during film formation, which can lead to densification of the film and can also improve the moisture resistance of the resulting film.
In addition, the compound represented by formula (1) has a high color value, and by using the colored composition of the present invention, a film having a high color value and excellent spectral characteristics can be formed.

The colored composition of the present invention can be preferably used as a colored composition for optical filters.
Examples of optical filters include color filters and infrared transmission filters. That is, the coloring composition of the present invention is preferably used as a coloring composition for color filters or infrared transmission filters, and more preferably used as a coloring composition for color filters. More specifically, it can be preferably used as a coloring composition for forming pixels of a color filter or a coloring composition for forming an infrared transmission filter, and more preferably used as a coloring composition for forming pixels of a color filter. The types of pixels in a color filter include red pixels, green pixels, blue pixels, magenta pixels, cyan pixels, yellow pixels, and the like, and are preferably red pixels, green pixels, or yellow pixels, more preferably red pixels or green pixels, and even more preferably red pixels.

The components used in the coloring composition of the present invention are described below.

<<Coloring Agent>>
The coloring composition of the present invention contains a colorant. Examples of the colorant include a yellow colorant, an orange colorant, a red colorant, a green colorant, a purple colorant, and a blue colorant. The colorant may be a pigment or a dye. The pigment may be either an inorganic pigment or an organic pigment, but is preferably an organic pigment from the viewpoints of a wide range of color variations, ease of dispersion, safety, and the like. In addition, a pigment derivative may be used as the colorant.

The colorant contained in the coloring composition of the present invention preferably contains at least one selected from the group consisting of a yellow colorant, a green colorant, and a red colorant, and more preferably contains at least a yellow colorant. In addition, the yellow colorant preferably contains a specific compound described below.
It is also preferable that the colorant contains at least one selected from a green colorant and a red colorant, and a yellow colorant.

The colorant contained in the coloring composition of the present invention preferably contains a pigment and a pigment derivative. Examples of the pigment derivative include compounds having a structure in which an acid group or a basic group is bonded to a colorant skeleton. The content of the pigment derivative is preferably 1 to 30 parts by mass, and more preferably 3 to 20 parts by mass, per 100 parts by mass of the pigment. Only one type of pigment derivative may be used, or two or more types may be used in combination.

The average primary particle diameter of the pigment and pigment derivative is preferably 1 to 200 nm. The lower limit is preferably 5 nm or more, more preferably 10 nm or more. The upper limit is preferably 180 nm or less, more preferably 150 nm or less, and even more preferably 100 nm or less. In this specification, the primary particle diameter of the pigment and pigment derivative can be determined from a photograph obtained by observing the primary particles of the pigment and pigment derivative with a transmission electron microscope. Specifically, the projected area of the primary particles of the pigment is determined, and the corresponding circle equivalent diameter is calculated as the primary particle diameter of the pigment. The average primary particle diameter in the present invention is the arithmetic mean value of the primary particle diameters of 400 primary particles of the pigment. The primary particles of the pigment refer to independent particles that are not aggregated. The same applies to the average primary particle diameter of the pigment derivative.

The crystallite size of the pigment or pigment derivative, determined from the half-width of a peak derived from any crystal plane in the X-ray diffraction spectrum when CuKα radiation is used as the X-ray source, is preferably 0.1 to 100 nm, more preferably 0.5 to 50 nm, even more preferably 1 to 30 nm, and particularly preferably 5 to 25 nm.

The specific surface area of the pigment and pigment derivative is preferably 1 to 300 m ² /g. The lower limit is preferably 10 m ² /g or more, more preferably 30 m ² /g or more. The upper limit is preferably 250 m ² /g or less, more preferably 200 m ² /g or less. The value of the specific surface area can be measured according to DIN 66131: determination of the specific surface area of solids by gas adsorption in accordance with the BET (Brunauer, Emmett and Teller) method.

<<<Specific compound>>>
The colorant contained in the coloring composition of the present invention contains a compound represented by formula (1). The compound represented by formula (1) is also the compound of the present invention. The compound represented by (1) is also called a specific compound.

- Regarding ^A1 and ^A2 -
A ¹ and A ² in formula (1) each independently represent a cyclic structure. Examples of the cyclic structure include an aliphatic hydrocarbon ring, an aromatic hydrocarbon ring, and a heterocycle, and it is preferably an aromatic hydrocarbon ring or a heterocycle, and more preferably an aromatic hydrocarbon ring. The cyclic structure may be a single ring or a condensed ring. Specific examples of the cyclic structure represented by A ¹ and A ² include a benzene ring, a naphthalene ring, an anthracene ring, an azole ring, a furan ring, a thiol ring, a pyridine ring, a pyridazine ring, a pyrimidine ring, a pyrazine ring, a quinoline ring, an isoquinoline ring, and a quinoxaline ring, and it is preferably a benzene ring, a naphthalene ring, or a pyrazine ring.
The cyclic structure represented by ^A1 and ^A2 may have a substituent. Examples of the substituent include the substituent T described below and a group represented by formula (R-1) described below. The substituent other than the group represented by formula (R-1) is preferably a halogen atom, an alkyl group, an alkoxy group, a thioalkoxy group, or an alkylsulfonyl group.

- Regarding ^B1 and ^B2 -
^B1 and ^B2 in formula (1) each independently represent O, S, or a group represented by formula (B-1), preferably O or a group represented by formula (B-1), and more preferably a group represented by formula (B-1).

R ^B1 and R ^B2 in formula (B-1) each independently represent a hydrogen atom or a substituent. Examples of the substituent include the substituent T described below and a group represented by formula (R-1) described below, and are preferably an alkyl group, an aryl group, a cyano group, an acyl group, an acyloxy group, or an acylamino group. Either R ^B1 or R ^B2 is preferably a cyano group, an acyl group, an acyloxy group, or an acylamino group, and it is more preferable that R ^B1 and R ^B2 are each independently a cyano group, an acyl group, an acyloxy group, or an acylamino group, because this improves intermolecular interaction.

In formula (B-1), R ^B1 and R ^B2 may be bonded to form a ring. The ring formed may be a single ring or a condensed ring. Specific examples of the ring formed include a barbituric acid ring and an indandione ring. The ring formed may have a substituent. Examples of the substituent include a substituent T described below and a group represented by formula (R-1) described below. The substituent other than the group represented by formula (R-1) is preferably a halogen atom, an alkyl group, an alkoxy group, a thioalkoxy group, or an alkylsulfonyl group.

-About ^L1-
L ¹ in formula (1) represents a group represented by formula (L-1).

X ^{1 L1} and X 1 ^L2 in formula (L-1) each independently represent O or S, and are preferably O since this can further improve the heat resistance of the resulting film.

^C1 in formula (L-1) represents a fused ring structure or a monocyclic structure having six or more members.
When ^C1 is a fused ring structure, the fused ring structure represented by ^C1 preferably contains 2 to 8 rings, and more preferably 2 to 6 rings.
When ^C1 is a monocyclic ring structure, the ring structure represented by ^C1 is preferably a 6- to 8-membered monocyclic ring structure, and more preferably a 6-membered monocyclic ring structure.

^L1 in formula (L-1) is preferably a group represented by any one of formulas (L-1) to (L-5).

-Regarding the Substituent T-
Examples of the substituent T include the following groups: a halogen atom (e.g., a fluorine atom, a chlorine atom, a bromine atom, an iodine atom), an alkyl group (preferably an alkyl group having 1 to 30 carbon atoms), an alkenyl group (preferably an alkenyl group having 2 to 30 carbon atoms), an alkynyl group (preferably an alkynyl group having 2 to 30 carbon atoms), an aryl group (preferably an aryl group having 6 to 30 carbon atoms), a heteroaryl group (preferably a heteroaryl group having 1 to 30 carbon atoms), an amino group (preferably an amino group having 0 to 30 carbon atoms), an alkoxy group (preferably an alkoxy group having 1 to 30 carbon atoms), an aryloxy group (preferably an aryloxy group having 6 to 30 carbon atoms), a heteroaryloxy group (preferably a heteroaryloxy group having 1 to 30 carbon atoms), an acyl group (preferably an acyl group having 2 to 30 carbon atoms), an alkoxycarbonyl group (preferably an alkoxycarbonyl group having 2 to 30 carbon atoms), an aryloxycarbonyl group (preferably an alkoxycarbonyl group having 2 to 30 carbon atoms), an aryloxycarbonyl group (preferably an aryl ... a aryl group (preferably an aryloxycarbonyl group having 7 to 30 carbon atoms), a heteroaryloxycarbonyl group (preferably a heteroaryloxycarbonyl group having 2 to 30 carbon atoms), an acyloxy group (preferably an acyloxy group having 2 to 30 carbon atoms), an acylamino group (preferably an acylamino group having 2 to 30 carbon atoms), an aminocarbonylamino group (preferably an aminocarbonylamino group having 2 to 30 carbon atoms), an alkoxycarbonylamino group (preferably an alkoxycarbonylamino group having 2 to 30 carbon atoms), an aryloxycarbonylamino group (preferably an aryloxycarbonylamino group having 7 to 30 carbon atoms), a sulfamoyl group (preferably a sulfamoyl group having 0 to 30 carbon atoms), a sulfamoylamino group (preferably a sulfamoylamino group having 0 to 30 carbon atoms), a carbamoyl group (preferably a carbamoylamino group having 1 to 30 carbon atoms), a heteroarylthio group (preferably a heteroarylthio group having 1 to 30 carbon atoms), an alkylsulfonyl group (preferably an alkylsulfonyl group having 1 to 30 carbon atoms), an arylthio group (preferably an arylthio group having 6 to 30 carbon atoms), a heteroarylthio group (preferably a heteroarylthio group having 1 to 30 carbon atoms), an alkylsulfonyl group (preferably an alkylsulfonyl group having 1 to 30 carbon atoms), an alkylsulfonylamino group (preferably an alkylsulfonylamino group having 1 to 30 carbon atoms), an arylsulfonyl group (preferably an arylsulfonylamino group having 6 to 30 carbon atoms), an arylsulfonylamino group (preferably an arylsulfonylamino group having 6 to 30 carbon atoms), a heteroarylsulfonyl group (preferably a heteroarylsulfonyl group having 1 to 30 carbon atoms), a heteroarylsulfonylamino group (preferably a heteroarylsulfonylamino group having 1 to 30 carbon atoms), an alkylsulfinyl group (preferably a 30 alkylsulfinyl group), arylsulfinyl group (preferably an arylsulfinyl group having 6 to 30 carbon atoms), heteroarylsulfinyl group (preferably a heteroarylsulfinyl group having 1 to 30 carbon atoms), ureido group (preferably a ureido group having 1 to 30 carbon atoms), hydroxy group, nitro group, carboxy group, sulfo group, phosphoric acid group, carboxylic acid amide group, sulfonic acid amide group, imido group, phosphino group, mercapto group, cyano group, alkylsulfino group, arylsulfino group, arylazo group, heteroarylazo group, phosphinyl group, phosphinyloxy group, phosphinylamino group, silyl group, hydrazino group, imino group, polymerizable group (for example, ethylenically unsaturated bond-containing group such as vinyl group, (meth)allyl group, (meth)acryloyl group, (meth)acryloyloxy group, and (meth)acryloylamino group). When these groups are further substitutable groups, they may further have a substituent. Examples of the substituent include the groups explained above for the substituent T and the groups represented by the formula (R-1) described below.

--Regarding the group represented by formula (R-1)--
-L ^R1 -(Y ^R1 ) _n ...(R-1)
In formula (R-1), L ^R1 represents a single bond or an (n+1)-valent linking group,
Y ^R1 represents an acid group or a basic group;
n represents an integer of 1 to 4, and n is 1 when L ^{3 R1} is a single bond.

In formula (R-1), L 1 ^R1 represents a single bond or a linking group having a valence of n+1. When Y ^{1 R1} is a basic group, L ^{1 R1} is preferably a linking group having a valence of n+1.

Examples of the n+1-valent linking group represented by L ^R1 include an aliphatic hydrocarbon group, an aromatic hydrocarbon group, a heterocyclic group, -O-, -S-, -CO-, -COO-, -OCO-, -SO ₂ -, -NR ^L10 -, -N<, -NR ^L10 CO-, -CONR ^L10 -, -NR ^L10 SO ₂ -, -SO ₂ NR ^L10 -, and groups consisting of combinations thereof. R ^L10 represents a hydrogen atom, an alkyl group, or an aryl group.

The aliphatic hydrocarbon group may be a saturated aliphatic hydrocarbon group or an unsaturated aliphatic hydrocarbon group. The aliphatic hydrocarbon group may be linear, branched, or cyclic. The number of carbon atoms in the aliphatic hydrocarbon group is preferably 1 to 30, more preferably 1 to 20, even more preferably 1 to 10, and particularly preferably 1 to 5.
The aromatic hydrocarbon group preferably has 6 to 20 carbon atoms, more preferably 6 to 12 carbon atoms, and even more preferably 6 carbon atoms.
The heterocyclic group is preferably a single ring or a condensed ring having 2 to 4 condensed rings. The number of heteroatoms constituting the ring of the heterocyclic group is preferably 1 to 3. The heteroatoms constituting the ring of the heterocyclic group are preferably nitrogen atoms, oxygen atoms, or sulfur atoms. The number of carbon atoms constituting the ring of the heterocyclic group is preferably 3 to 30, more preferably 3 to 18, and more preferably 3 to 12.
The aliphatic hydrocarbon group, aromatic hydrocarbon group and heterocyclic group may have a substituent, such as an alkyl group or an aryl group.

In formula (R-1), Y ^{1 R1} represents an acid group or a basic group. Examples of the acid group represented by Y ^{1 R1} include a carboxy group, a sulfo group, a phosphate group, a boronic acid group, an imidic acid group, and salts thereof. Examples of the atom or atomic group constituting the salt include an alkali metal ion (Li ⁺ , Na ⁺ , K ⁺ , etc.), an alkaline earth metal ion (Ca ²⁺ , Mg ²⁺ , etc.), an ammonium ion, an imidazolium ion, a pyridinium ion, and a phosphonium ion. As the imide acid group, -SO ₂ NHSO ₂ R ^X1 , -CONHSO ₂ R ^X2 , -CONHCOR ^X3 or -SO ₂ NHCOR ^X4 is preferable, -SO ₂ NHSO ₂ R ^X1 , -CONHSO ₂ R ^X2 or -SO ₂ NHCOR ^X4 is more preferable, and -SO ₂ NHSO ₂ R ^X1 or -CONHSO ₂ R ^X2 is even more preferable. R ^X1 to R ^X4 each independently represent an alkyl group or an aryl group. The alkyl group and aryl group represented by R ^X1 to R ^X4 may have a substituent. The substituent is preferably a halogen atom, more preferably a fluorine atom. R ^X1 to R ^X4 each independently represent an alkyl group containing a fluorine atom or an aryl group containing a fluorine atom, more preferably an alkyl group containing a fluorine atom. The number of carbon atoms in the alkyl group containing a fluorine atom is preferably 1 to 10, more preferably 1 to 5, and still more preferably 1 to 3. The number of carbon atoms in the aryl group containing a fluorine atom is preferably 6 to 20, more preferably 6 to 12, and still more preferably 6.

Examples of the basic group represented by ^YR1 include an amino group, a pyridinyl group and its salt, an ammonium salt, and a ^{phthalimidomethyl} group. Examples of the atom or atomic group constituting the salt include a hydroxide ion, a halogen ion, a carboxylate ion, a sulfonate ion, and a phenoxide ion. Examples of the amino group include a group represented by ^-NRx11Rx12 and a cyclic amino group.

In the group represented by -NR ^x11 R ^x12 , R ^x11 and R ^x12 each independently represent a hydrogen atom, an alkyl group or an aryl group, and are preferably an alkyl group. That is, the amino group is preferably a dialkylamino group. The number of carbon atoms of the alkyl group is preferably 1 to 10, more preferably 1 to 5, and even more preferably 1 to 3. The alkyl group may be linear, branched, or cyclic, but is preferably linear or branched, and more preferably linear. The alkyl group may have a substituent. Examples of the substituent include the above-mentioned substituent T. The number of carbon atoms of the aryl group is preferably 6 to 30, more preferably 6 to 20, and even more preferably 6 to 12. The aryl group may have a substituent. Examples of the substituent include the above-mentioned substituent T.

Examples of cyclic amino groups include pyrrolidine groups, piperidine groups, piperazine groups, and morpholine groups. These groups may further have a substituent. Examples of the substituent include the substituent T described above.

In formula (R-1), n represents an integer from 1 to 4, preferably 1 or 2, and more preferably 1.

The specific compound may be a pigment or a dye. The specific compound may also be a pigment derivative. When the specific compound is used as a pigment derivative, it is preferable that the specific compound is a compound having a group represented by formula (R-1) as a substituent.

The maximum absorption wavelength of the specific compound is preferably in the wavelength range of 350 to 600 nm, and more preferably in the wavelength range of 400 to 600 nm. In addition, the specific compound is preferably a yellow colorant.

Specific examples of specific compounds include compounds (P-1) to (P-33) described in the Examples below. Compounds (P-1) to (P-27) are used as pigments. Compounds (P-28) to (P-33) can also be used as pigments, and can also be used as pigment derivatives.

<<<Other colorants>>>
The colorant contained in the coloring composition of the present invention may further contain a colorant other than the specific compound described above (hereinafter, also referred to as other colorant). Examples of other colorants that may be used in combination include green colorants, red colorants, yellow colorants, purple colorants, blue colorants, and orange colorants. In addition, pigment derivatives may also be used as the other colorants.

The other colorants preferably include at least one selected from a green colorant, a red colorant, a yellow colorant, and an orange colorant, more preferably include at least one selected from a green colorant, a red colorant, and a yellow colorant, and even more preferably include at least one selected from a green colorant and a red colorant.

Red colorants include diketopyrrolopyrrole compounds, anthraquinone compounds, azo compounds, naphthol compounds, azomethine compounds, xanthene compounds, quinacridone compounds, perylene compounds, and thioindigo compounds, with diketopyrrolopyrrole compounds, anthraquinone compounds, and azo compounds being preferred, and diketopyrrolopyrrole compounds being more preferred. The red colorant is also preferably a pigment, and diketopyrrolopyrrole pigments are more preferred.

Specific examples of red colorants include C.I. (Color Index) Pigment Red 1, 2, 3, 4, 5, 6, 7, 9, 10, 14, 17, 22, 23, 31, 38, 41, 48:1, 48:2, 48:3, 48:4, 49, 49:1, 49:2, 52:1, 52:2, 53:1, 57:1, 60:1, 63:1, 66, 67, 81:1, 81:2, 81:3, 83, 88, 90, 105, 112, 119, 122, 123, 144, 146, 149, Examples of red pigments include 150, 155, 166, 168, 169, 170, 171, 172, 175, 176, 177, 178, 179, 184, 185, 187, 188, 190, 200, 202, 206, 207, 208, 209, 210, 216, 220, 224, 226, 242, 246, 254, 255, 264, 269, 270, 272, 279, 291, 294, 295, 296, and 297. In addition, as a red colorant, a compound described in paragraph 0034 of International Publication No. 2022/085485 and a brominated diketopyrrolopyrrole compound described in JP-A-2020-085947 can also be used.

As red colorants, C.I. Pigment Red 122, 177, 224, 254, 255, 264, 269, and 272 are preferred, C.I. Pigment Red 254, 264, and 272 are more preferred, and C.I. Pigment Red 254 and 264 are even more preferred.

Green colorants include phthalocyanine compounds and squarylium compounds, with phthalocyanine compounds being preferred because they are more likely to form a film with excellent heat diffusion resistance. The green colorant is preferably a pigment, and more preferably a phthalocyanine pigment.

Specific examples of green colorants include green pigments such as C.I. Pigment Green 7, 10, 36, 37, 58, 59, 62, 63, 64, 65, and 66. In addition, halogenated zinc phthalocyanine pigments having an average of 10 to 14 halogen atoms, an average of 8 to 12 bromine atoms, and an average of 2 to 5 chlorine atoms in one molecule can also be used as green colorants. Specific examples include the compounds described in WO 2015/118720. In addition, compounds described in paragraph 0029 of WO 2022/085485, aluminum phthalocyanine compounds described in JP 2020-070426 A, and diarylmethane compounds described in JP 2020-504758 A can also be used as green colorants.

Preferred green colorants are C.I. Pigment Green 7, 36, 58, 62, and 63.

Orange colorants include diketopyrrolopyrrole compounds and azo compounds, and are preferably diketopyrrolopyrrole compounds. The orange colorant is preferably a pigment. Specific examples of orange colorants include orange pigments such as C.I. Pigment Orange 2, 5, 13, 16, 17:1, 31, 34, 36, 38, 43, 46, 48, 49, 51, 52, 55, 59, 60, 61, 62, 64, 71, and 73.

Yellow colorants include azo compounds, azomethine compounds, isoindoline compounds, pteridine compounds, quinophthalone compounds, and perylene compounds. The yellow colorant is preferably a pigment. Specific examples of yellow colorants include C.I. Pigment Yellow 1, 2, 3, 4, 5, 6, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 24, 31, 32, 34, 35, 35:1, 36, 36:1, 37, 37:1, 40, 42, 43, 53, 55, 60, 61, 62, 63, 65, 73, 74, 77, 81, 83, 86, 93, 94, 95, 97, 98, 100, 101, 104, 106, 108, 109, 110, 113, 114, 115, 116, 117, 118, 119, 120, 123, 125 , 126, 127, 128, 129, 137, 138, 139, 147, 148, 150, 151, 152, 153, 154, 155, 156, 161, 162, 164, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 179, 180, 181, 182, 185, 187, 188, 193, 194, 199, 213, 214, 215, 228, 231, 232, 233, 234, 235, 236, and other yellow pigments.

As the yellow colorant, an azobarbituric acid nickel complex having the following structure can also be used.

As yellow colorants, the compounds described in paragraphs 0031 to 0033 of WO 2022/085485, the methine dyes described in JP 2019-073695 A, and the methine dyes described in JP 2019-073696 A can be used.

Examples of purple colorants include dioxazine compounds, quinacridone compounds, perylene compounds, and thioindigo compounds. The purple colorant is preferably a pigment. Specific examples of purple colorants include purple pigments such as C.I. Pigment Violet 1, 19, 23, 27, 32, 37, 42, 60, and 61.

Examples of blue colorants include phthalocyanine compounds and squarylium compounds, and phthalocyanine compounds are preferred. The blue colorant is preferably a pigment. Specific examples of blue colorants include blue pigments such as C.I. Pigment Blue 1, 2, 15, 15:1, 15:2, 15:3, 15:4, 15:6, 16, 22, 29, 60, 64, 66, 79, 80, 87, and 88. Aluminum phthalocyanine compounds having phosphorus atoms can also be used as blue colorants. Specific examples include the compounds described in paragraphs 0022 to 0030 of JP-A No. 2012-247591 and paragraph 0047 of JP-A No. 2011-157478.

Dyes can also be used as other colorants. There are no particular limitations on the dyes, and any known dyes can be used. Examples include pyrazole azo dyes, anilino azo dyes, triarylmethane dyes, anthraquinone dyes, anthrapyridone dyes, benzylidene dyes, oxonol dyes, pyrazolotriazole azo dyes, pyridone azo dyes, cyanine dyes, phenothiazine dyes, pyrrolopyrazole azomethine dyes, xanthene dyes, phthalocyanine dyes, benzopyran dyes, indigo dyes, and pyrromethene dyes.

A dye polymer can also be used as the other colorant. The dye polymer is preferably a dye dissolved in a solvent before use. The dye polymer may form particles. When the dye polymer is in the form of particles, it is usually used in a state of being dispersed in a solvent. The dye polymer in a particle state can be obtained, for example, by emulsion polymerization, and examples of the compound and manufacturing method described in JP-A-2015-214682 include the compound and manufacturing method described therein. The dye polymer has two or more dye structures in one molecule, and preferably has three or more dye structures. There is no particular limit to the upper limit, but it can be 100 or less. The multiple dye structures in one molecule may be the same dye structure or different dye structures. The weight average molecular weight (Mw) of the dye polymer is preferably 2,000 to 50,000. The lower limit is more preferably 3,000 or more, and even more preferably 6,000 or more. The upper limit is more preferably 30,000 or less, and even more preferably 20,000 or less. The dye multimer may be a compound described in JP2011-213925A, JP2013-041097A, JP2015-028144A, JP2015-030742A, WO2016/031442, etc.

Other colorants include triarylmethane dye polymers described in Korean Patent Publication No. 10-2020-0028160, xanthene compounds described in JP 2020-117638 A, phthalocyanine compounds described in WO 2020/174991, isoindoline compounds or salts thereof described in JP 2020-160279 A, compounds represented by formula 1 described in Korean Patent Publication No. 10-2020-0069442, compounds represented by formula 1 described in Korean Patent Publication No. 10-2020-0069730, and compounds represented by formula 1 described in Korean Patent Publication No. 10-2020-0069070. Compounds represented by formula 1 described in Korean Patent Publication No. 10-2020-0069067, compounds represented by formula 1 described in Korean Patent Publication No. 10-2020-0069062, halogenated zinc phthalocyanine pigments described in Japanese Patent No. 6809649, isoindoline compounds described in JP-A-2020-180176, phenothiazine compounds described in JP-A-2021-187913, halogenated zinc phthalocyanines described in WO 2022/004261, and halogenated zinc phthalocyanines described in WO 2021/250883 can be used. The other colorant may be a rotaxane, and the dye skeleton may be used in the cyclic structure of the rotaxane, may be used in the rod-shaped structure, or may be used in both structures. Other colorants include quinophthalone compounds represented by formula 1 in Korean Patent Publication No. 10-2020-0030759, polymer dyes described in Korean Patent Publication No. 10-2020-0061793, colorants described in JP-A-2022-029701, isoindoline compounds described in WO 2022/014635, aluminum phthalocyanine compounds described in WO 2022/024926, compounds described in JP-A-2022-045895, compounds described in WO 2022/050051, compounds described in JP-A-2020-090676, compounds described in JP-A-2020-055956, compounds described in JP-A-2021-031681, compounds described in JP-A-2022-056354, and compounds described in U.S. Patent Application Publication No. Compounds described in JP 2021/0355327, compounds described in WO 2022/065357, compounds described in JP 2020-045436, compounds described in Korean Patent Publication No. 10-2021-0146726, compounds described in JP 2018-178039, compounds described in Chinese Patent Application Publication No. 113881244, compounds described in Chinese Patent Application Publication No. 113881245, compounds described in Chinese Patent Application Publication No. 113881246, compounds described in JP 2022-104822, compounds described in JP 2022-096701, compounds described in JP 2020-023652, green pigments described on pages 80 to 84 of the Journal of the Color Materials Association (published in 2022), and the like can also be used.

When the coloring composition of the present invention contains a green colorant, it is preferably used as a coloring composition for forming green pixels of a color filter. When the coloring composition of the present invention contains a red colorant, it is preferably used as a coloring composition for forming red pixels of a color filter.

In addition, the colorant contained in the coloring composition may contain two or more chromatic colorants, and may form a black color by combining two or more chromatic colorants. Such a coloring composition is preferably used as a coloring composition for forming an infrared transmission filter. Examples of the combination of chromatic colorants when forming a black color by combining two or more chromatic colorants include the following.
(1) An embodiment containing a red colorant, a blue colorant, and a yellow colorant.
(2) An embodiment containing a red colorant, a blue colorant, a yellow colorant, and a purple colorant.
(3) An embodiment containing a red colorant, a blue colorant, a yellow colorant, a purple colorant, and a green colorant.
(4) An embodiment containing a red colorant, a blue colorant, a yellow colorant, and a green colorant.
(5) An embodiment containing a yellow colorant and a purple colorant.

Other colorants that can be used include pigment derivatives. Examples of pigment derivatives include compounds that have at least one structure selected from the group consisting of a dye structure and a triazine structure, and an acid group or a basic group.

The above dye structures include a quinoline dye structure, a benzimidazolone dye structure, a benzisoindole dye structure, a benzothiazole dye structure, an iminium dye structure, a squarylium dye structure, a croconium dye structure, an oxonol dye structure, a pyrrolopyrrole dye structure, a diketopyrrolopyrrole dye structure, an azo dye structure, an azomethine dye structure, a phthalocyanine dye structure, a naphthalocyanine dye structure, an anthraquinone dye structure, a quinacridone dye structure, a dioxazine dye structure, a perinone dye structure, a perylene dye structure, a thiazineindigo dye structure, a thioindigo dye structure, an isoindoline dye structure, an isoindolinone dye structure, a quinophthalone dye structure, a dithiol dye structure, a triarylmethane dye structure, and a pyrromethene dye structure.

Examples of the acid group possessed by the pigment derivative include a carboxy group, a sulfo group, a phosphate group, a boronic acid group, an imide acid group, and salts thereof. Examples of the atom or atomic group constituting the salt include an alkali metal ion (Li ⁺ , Na ⁺ , K ⁺ , etc.), an alkaline earth metal ion (Ca ²⁺ , Mg ²⁺ , etc.), an ammonium ion, an imidazolium ion, a pyridinium ion, and a phosphonium ion. Examples of the imide acid group include -SO ₂ NHSO ₂ R ^X1 , -CONHSO ₂ R ^X2 , -CONHCOR ^X3 , and -SO ₂ NHCOR ^X4 , and -SO ₂ NHSO ₂ R ^X1 , -CONHSO ₂ R ^X2 , and -SO ₂ NHCOR ^X4 are more preferable, and -SO ₂ NHSO ₂ R ^X1 or -CONHSO ₂ R ^X2 are even more preferable. R ^X1 to R ^X4 each independently represent an alkyl group or an aryl group. The alkyl group and aryl group represented by R ^X1 to R ^X4 may have a substituent. The substituent is preferably a halogen atom, more preferably a fluorine atom. R ^X1 to R ^X4 each independently represent an alkyl group containing a fluorine atom or an aryl group containing a fluorine atom, more preferably an alkyl group containing a fluorine atom. The number of carbon atoms of the alkyl group containing a fluorine atom is preferably 1 to 10, more preferably 1 to 5, and even more preferably 1 to 3. The number of carbon atoms of the aryl group containing a fluorine atom is preferably 6 to 20, more preferably 6 to 12, and even more preferably 6.

Basic groups contained in pigment derivatives include amino groups, pyridinyl groups and their salts, salts of ammonium groups, and phthalimidomethyl groups. Atoms or atomic groups that constitute the salts include hydroxide ions, halogen ions, carboxylate ions, sulfonate ions, and phenoxide ions.

Examples of the amino group include a group represented ^{by --NR.sub.x11R.sub.x12} and a cyclic amino group.

In the group represented by -NR ^x11 R ^x12 , R ^x11 and R ^x12 each independently represent a hydrogen atom, an alkyl group or an aryl group, and are preferably an alkyl group. That is, the amino group is preferably a dialkylamino group. The number of carbon atoms of the alkyl group is preferably 1 to 10, more preferably 1 to 5, and even more preferably 1 to 3. The alkyl group may be linear, branched, or cyclic, but is preferably linear or branched, and more preferably linear. The alkyl group may have a substituent. Examples of the substituent include the above-mentioned substituent T. The number of carbon atoms of the aryl group is preferably 6 to 30, more preferably 6 to 20, and even more preferably 6 to 12. The aryl group may have a substituent. Examples of the substituent include the above-mentioned substituent T.

Cyclic amino groups include pyrrolidine groups, piperidine groups, piperazine groups, and morpholine groups. These groups may further have a substituent.

The pigment derivative may be a pigment derivative having excellent visible transparency (hereinafter, also referred to as a transparent pigment derivative). The maximum molar absorption coefficient (εmax) of the transparent pigment derivative in the wavelength region of 400 to 700 nm is preferably 3000 L·mol ^-1 ·cm ^-1 or less, more preferably 1000 L·mol ^-1 ·cm ^-1 or less, and even more preferably 100 L·mol-1·cm ^-1 or less. The lower limit of εmax is, for example, 1 L·mol ^{- 1} ·cm ^-1 or more, and may be 10 L·mol ^-1 ·cm ^-1 or more.

Specific examples of pigment derivatives include the compounds described in the Examples below, the compounds described in paragraph 0124 of WO 2022/085485, the benzimidazolone compounds or salts thereof described in JP 2018-168244 A, and the compounds having an isoindoline skeleton described in general formula (1) of Japanese Patent No. 6996282.

The content of the colorant in the total solid content of the coloring composition is preferably 40% by mass or more, more preferably 50% by mass or more, and even more preferably 55% by mass or more. The upper limit is preferably 80% by mass or less, more preferably 75% by mass or less, even more preferably 70% by mass or less, and even more preferably 65% by mass or less.

The content of the pigment in the colorant is preferably 20 to 100% by mass, more preferably 50 to 100% by mass, and even more preferably 70 to 100% by mass. The total content of the pigment and pigment derivative in the colorant is preferably 25 to 100% by mass, more preferably 55 to 100% by mass, and even more preferably 75 to 100% by mass.

The content of the specific compound in the colorant is preferably 5% by mass or more, more preferably 10% by mass or more, and even more preferably 15% by mass or more. The upper limit can be 100% by mass, or can be 95% by mass or less, or can be 90% by mass or less.

When the colorant contained in the coloring composition of the present invention contains a specific compound and a green colorant, the content of the specific compound is preferably 5 to 60 parts by mass per 100 parts by mass of the green colorant. The lower limit is preferably 10 parts by mass or more, and more preferably 15 parts by mass or more. The upper limit is preferably 50 parts by mass or less, and more preferably 40 parts by mass or less.

When the colorant contained in the coloring composition of the present invention contains a specific compound and a red colorant, the content of the red colorant, i.e., the content of the specific compound, is preferably 5 to 50 parts by mass per 100 parts by mass of the red colorant. The lower limit is preferably 10 parts by mass or more, and more preferably 15 parts by mass or more. The upper limit is preferably 40 parts by mass or less, and more preferably 30 parts by mass or less.

When the coloring composition of the present invention is used as a coloring composition for forming green pixels of a color filter, it is preferable to use a colorant containing a yellow colorant and a green colorant. In addition, it is preferable that the specific compound is a yellow colorant. The mass ratio of the yellow colorant to the green colorant is preferably yellow colorant:green colorant=30:70 to 70:30, more preferably 30:70 to 60:40, and even more preferably 30:70 to 50:50. In addition, the content of the specific compound is preferably 5 to 60 parts by mass per 100 parts by mass of the green colorant. The lower limit is preferably 10 parts by mass or more, and more preferably 15 parts by mass or more. The upper limit is preferably 50 parts by mass or less, and more preferably 40 parts by mass or less.

When the coloring composition of the present invention is used as a coloring composition for forming red pixels of a color filter, it is preferable to use a colorant containing a yellow colorant and a red colorant. In addition, it is preferable that the specific compound is a yellow colorant. The mass ratio of the yellow colorant to the red colorant is preferably yellow colorant:red colorant=30:70 to 70:30, more preferably 30:70 to 60:40, and even more preferably 30:70 to 50:50. In addition, the content of the specific compound is preferably 5 to 50 parts by mass per 100 parts by mass of the red colorant. The lower limit is preferably 10 parts by mass or more, and more preferably 15 parts by mass or more. The upper limit is preferably 40 parts by mass or less, and more preferably 30 parts by mass or less.

When the coloring composition of the present invention is used as a coloring composition for forming yellow pixels of a color filter, the content of the yellow colorant in the colorant is preferably 30% by mass or more, more preferably 40% by mass or more, and even more preferably 50% by mass or more. In addition, the specific compound is preferably a yellow colorant. The content of the specific compound in the yellow colorant is preferably 20% by mass or more, more preferably 25% by mass or more, and even more preferably 30% by mass or more. The upper limit can be 100% by mass, can be 95% by mass or less, or can be 90% by mass or less.

<<Resin>>
The coloring composition of the present invention contains a resin. The resin is blended, for example, for dispersing pigments in the coloring composition or for use as a binder. Note that a resin used mainly for dispersing pigments in the coloring composition is also called a dispersant. However, such uses of the resin are merely examples, and the resin can also be used for purposes other than such uses.

The weight average molecular weight (Mw) of the resin is preferably 3,000 to 2,000,000. The upper limit is preferably 1,000,000 or less, and more preferably 500,000 or less. The lower limit is preferably 4,000 or more, and more preferably 5,000 or more.

Examples of resins include (meth)acrylic resins, epoxy resins, (meth)acrylamide resins, ene-thiol resins, polycarbonate resins, polyether resins, polyarylate resins, polysulfone resins, polyethersulfone resins, polyphenylene resins, polyarylene ether phosphine oxide resins, polyimide resins, polyamideimide resins, polyolefin resins, cyclic olefin resins, polyester resins, styrene resins, and siloxane resins. Further, as the resin, there are resins described in paragraphs 0091 to 0099 of WO 2022/065215, block polyisocyanate resins described in JP 2016-222891 A, resins described in JP 2020-122052 A, resins described in JP 2020-111656 A, resins described in JP 2020-139021 A, and structural units having a ring structure in the main chain and side chains described in JP 2017-138503 A and a structural unit having a biphenyl group, the resin described in paragraphs 0199 to 0233 of JP 2020-186373 A, the alkali-soluble resin described in JP 2020-186325 A, the resin represented by formula 1 described in Korean Patent Publication No. 10-2020-0078339 A, the copolymer containing an epoxy group and an acid group described in WO 2022/030445 A, and the compound described in JP 2018-135514 A can also be used.

It is preferable to use a resin having an acid group as the resin. Examples of the acid group include a carboxy group, a phosphate group, a sulfo group, and a phenolic hydroxy group.

The acid value of the resin having acid groups is preferably 30 to 500 mgKOH/g. The lower limit is more preferably 40 mgKOH/g or more, and particularly preferably 50 mgKOH/g or more. The upper limit is more preferably 400 mgKOH/g or less, even more preferably 300 mgKOH/g or less, and particularly preferably 200 mgKOH/g or less. The weight average molecular weight (Mw) of the resin having acid groups is preferably 5,000 to 100,000, and more preferably 5,000 to 50,000. The number average molecular weight (Mn) of the resin having acid groups is preferably 1,000 to 20,000.

The resin having an acid group preferably contains a repeating unit having an acid group on the side chain, and more preferably contains 5 to 70 mol% of the repeating units having an acid group on the side chain out of all the repeating units of the resin. The upper limit of the content of repeating units having an acid group on the side chain is preferably 50 mol% or less, and more preferably 30 mol% or less. The lower limit of the content of repeating units having an acid group on the side chain is preferably 10 mol% or more, and more preferably 20 mol% or more.

For the resin having an acid group, the description in paragraphs 0558 to 0571 of JP 2012-208494 A (corresponding paragraphs 0685 to 0700 of the specification of US Patent Application Publication No. 2012/0235099) and the description in paragraphs 0076 to 0099 of JP 2012-198408 A can be referred to, and the contents of these are incorporated herein. In addition, a commercially available product can also be used as the resin having an acid group. In addition, there is no particular restriction on the method of introducing an acid group into the resin, but an example of the method is the method described in Japanese Patent No. 6349629 A. Furthermore, as a method of introducing an acid group into a resin, a method of reacting an acid anhydride with a hydroxyl group generated by a ring-opening reaction of an epoxy group to introduce an acid group can also be mentioned.

The coloring composition of the present invention also preferably contains a resin having a basic group. The resin having a basic group is preferably a resin containing a repeating unit having a basic group in the side chain, more preferably a copolymer having a repeating unit having a basic group in the side chain and a repeating unit not having a basic group, and even more preferably a block copolymer having a repeating unit having a basic group in the side chain and a repeating unit not having a basic group. The resin having a basic group can also be used as a dispersant. The amine value of the resin having a basic group is preferably 5 to 300 mgKOH/g. The lower limit is preferably 10 mgKOH/g or more, and more preferably 20 mgKOH/g or more. The upper limit is preferably 200 mgKOH/g or less, and more preferably 100 mgKOH/g or less.

Commercially available resins with basic groups include DISPERBYK-161, 162, 163, 164, 166, 167, 168, 174, 182, 183, 184, 185, 2000, 2001, 2050, 2150, 2163, 2164, BYK-LPN6919 (all manufactured by BYK-Chemie), Solsperse 11200, 13240, 13650, 13940, 24 000, 26000, 28000, 32000, 32500, 32550, 32600, 33000, 34750, 35100, 35200, 37500, 38500, 39000, 53095, 56000, 7100 (all manufactured by Lubrizol Japan), Efka PX 4300, 4330, 4046, 4060, 4080 (all manufactured by BASF), and the like. In addition, the resin having a basic group may be a block copolymer (B) described in paragraphs 0063 to 0112 of JP 2014-219665 A, a block copolymer A1 described in paragraphs 0046 to 0076 of JP 2018-156021 A, or a vinyl resin having a basic group described in paragraphs 0150 to 0153 of JP 2019-184763 A, the contents of which are incorporated herein by reference.

It is also preferable that the coloring composition of the present invention contains both a resin having an acid group and a resin having a basic group. According to this embodiment, the storage stability of the coloring composition can be further improved. When a resin having an acid group and a resin having a basic group are used in combination, the content of the resin having a basic group is preferably 20 to 500 parts by mass, more preferably 30 to 300 parts by mass, and even more preferably 50 to 200 parts by mass, per 100 parts by mass of the resin having an acid group.

As the resin, it is also preferable to use a resin having an aromatic carboxy group. In a resin having an aromatic carboxy group, the aromatic carboxy group may be included in the main chain of a repeating unit, or may be included in a side chain of the repeating unit. It is preferable that the aromatic carboxy group is included in the main chain of a repeating unit. In this specification, an aromatic carboxy group refers to a group having a structure in which one or more carboxy groups are bonded to an aromatic ring. In an aromatic carboxy group, the number of carboxy groups bonded to an aromatic ring is preferably 1 to 4, and more preferably 1 to 2. Examples of resins having an aromatic carboxy group include the resins described in paragraphs 0082 to 0107 of WO 2021/166858.

The coloring composition of the present invention preferably contains a resin as a dispersant. Examples of dispersants include acidic dispersants (acidic resins) and basic dispersants (basic resins). Here, the acidic dispersant (acidic resin) refers to a resin in which the amount of acid groups is greater than the amount of basic groups. The acidic dispersant (acidic resin) is preferably a resin in which the amount of acid groups is 70 mol% or more when the total amount of the acid groups and the basic groups is 100 mol%. The acid group possessed by the acidic dispersant (acidic resin) is preferably a carboxy group. The acid value of the acidic dispersant (acidic resin) is preferably 10 to 105 mgKOH/g. The basic dispersant (basic resin) refers to a resin in which the amount of basic groups is greater than the amount of acid groups. The basic dispersant (basic resin) is preferably a resin in which the amount of basic groups is greater than the amount of acid groups when the total amount of the acid groups and the basic groups is 100 mol%. The basic group possessed by the basic dispersant is preferably an amino group.

It is also preferable that the resin used as the dispersant is a graft resin. For details on graft resins, please refer to the description in paragraphs 0025 to 0094 of JP 2012-255128 A, the contents of which are incorporated herein by reference.

It is also preferable that the resin used as the dispersant is a resin having an aromatic carboxy group. Examples of resins having an aromatic carboxy group include those mentioned above.

The resin used as the dispersant is preferably a polyimine-based dispersant containing nitrogen atoms in at least one of the main chain and side chain. The polyimine-based dispersant is preferably a resin having a main chain with a partial structure having a functional group with a pKa of 14 or less, a side chain with 40 to 10,000 atoms, and having a basic nitrogen atom in at least one of the main chain and side chain. There are no particular restrictions on the basic nitrogen atom, so long as it is a nitrogen atom that exhibits basicity. For details of polyimine-based dispersants, please refer to the description in paragraphs 0102 to 0166 of JP 2012-255128 A, the contents of which are incorporated herein by reference.

The resin used as the dispersant is preferably one having a structure in which multiple polymer chains are bonded to a core portion. Examples of such resins include dendrimers (including star-shaped polymers). Specific examples of dendrimers include polymer compounds C-1 to C-31 described in paragraphs 0196 to 0209 of JP2013-043962A.

The resin used as the dispersant is also preferably a resin containing a repeating unit having an ethylenically unsaturated bond-containing group in the side chain. The content of the repeating unit having an ethylenically unsaturated bond-containing group in the side chain is preferably 10 mol % or more of the total repeating units of the resin, more preferably 10 to 80 mol %, and even more preferably 20 to 70 mol %.

As dispersants, resins described in JP 2018-087939 A, block copolymers (EB-1) to (EB-9) described in paragraphs 0219 to 0221 of Japanese Patent No. 6,432,077 A, polyethyleneimine having a polyester side chain described in WO 2016/104803 A, block copolymers described in WO 2019/125940 A, block polymers having an acrylamide structural unit described in JP 2020-066687 A, block polymers having an acrylamide structural unit described in JP 2020-066688 A, dispersants described in WO 2016/104803 A, and the like can also be used.

Dispersants are also available as commercially available products, and specific examples include the DISPERBYK series manufactured by BYK Chemie, the SOLSPERSE series manufactured by Lubrizol Nippon, the Efka series manufactured by BASF, and the AJISPER series manufactured by Ajinomoto Fine-Techno Co., Ltd. In addition, the products described in paragraph 0129 of JP 2012-137564 A and the products described in paragraph 0235 of JP 2017-194662 A can also be used as dispersants.

The content of the resin in the total solid content of the coloring composition is preferably 1 to 60% by mass. The lower limit is preferably 5% by mass or more, more preferably 10% by mass or more, even more preferably 15% by mass or more, and particularly preferably 20% by mass or more. The upper limit is preferably 50% by mass or less, more preferably 40% by mass or less.
The content of the resin having an acid group in the total solid content of the coloring composition is preferably 1 to 60% by mass. The lower limit is preferably 5% by mass or more, more preferably 10% by mass or more, even more preferably 15% by mass or more, and particularly preferably 20% by mass or more. The upper limit is preferably 50% by mass or less, more preferably 40% by mass or less.

The content of the dispersant is preferably 10 to 100 parts by mass relative to 100 parts by mass of the pigment. The lower limit is preferably 15 parts by mass or more, and more preferably 20 parts by mass or more. The upper limit is preferably 80 parts by mass or less, and more preferably 60 parts by mass or less.
The coloring composition of the present invention may contain only one type of resin, or may contain two or more types of resins. When two or more types of resins are contained, the total amount thereof is preferably within the above range.

<<Solvent>>
The coloring composition of the present invention contains a solvent. Examples of the solvent include organic solvents. The type of solvent is not particularly limited as long as the solubility of each component and the coatability of the composition are satisfied. Examples of the organic solvent include ester-based solvents, ketone-based solvents, alcohol-based solvents, amide-based solvents, ether-based solvents, and hydrocarbon-based solvents. For details of these, reference can be made to paragraph number 0223 of International Publication No. 2015/166779, the contents of which are incorporated herein by reference. In addition, ester-based solvents substituted with a cyclic alkyl group and ketone-based solvents substituted with a cyclic alkyl group can also be preferably used. Specific examples of organic solvents include polyethylene glycol monomethyl ether, dichloromethane, methyl 3-ethoxypropionate, ethyl 3-ethoxypropionate, ethyl cellosolve acetate, ethyl lactate, diethylene glycol dimethyl ether, butyl acetate, methyl 3-methoxypropionate, 2-heptanone, 2-pentanone, 3-pentanone, 4-heptanone, cyclohexanone, 2-methylcyclohexanone, 3-methylcyclohexanone, 4-methylcyclohexanone, cycloheptanone, cyclooctanone, cyclohexyl acetate, cyclopentanone, ethyl carbitol acetate, butyl carbitol acetate, propylene glycol monomethyl ether, propylene glycol dimethyl ether, butyl acetate ... Examples of the ethylene glycol monomethyl ether acetate include 3-methoxy-N,N-dimethylpropanamide, 3-butoxy-N,N-dimethylpropanamide, propylene glycol diacetate, 3-methoxybutanol, methyl ethyl ketone, gamma butyrolactone, sulfolane, anisole, 1,4-diacetoxybutane, diethylene glycol monoethyl ether acetate, butane-1,3-diyl diacetate, dipropylene glycol methyl ether acetate, diacetone alcohol (also known as diacetone alcohol and 4-hydroxy-4-methyl-2-pentanone), 2-methoxypropyl acetate, 2-methoxy-1-propanol, and isopropyl alcohol. However, there are cases where it is better to reduce the amount of aromatic hydrocarbons (benzene, toluene, xylene, ethylbenzene, etc.) used as organic solvents for environmental reasons, etc. (for example, the amount can be 50 ppm (parts per million) by mass or less, 10 ppm by mass or less, or 1 ppm by mass or less, relative to the total amount of organic solvents).

In the present invention, it is preferable to use an organic solvent with a low metal content. The metal content of the organic solvent is preferably, for example, 10 parts per billion (ppb) by mass or less. If necessary, an organic solvent with a mass ppt (parts per trillion) level may be used, and such an organic solvent is provided, for example, by Toyo Gosei Co., Ltd. (The Chemical Daily, November 13, 2015).

Methods for removing impurities such as metals from organic solvents include, for example, distillation (molecular distillation, thin-film distillation, etc.) and filtration using a filter. The filter used for filtration preferably has a pore size of 10 μm or less, more preferably 5 μm or less, and even more preferably 3 μm or less. The filter material is preferably polytetrafluoroethylene, polyethylene, or nylon.

The organic solvent may contain isomers (compounds with the same number of atoms but different structures). In addition, the organic solvent may contain only one type of isomer, or multiple types of isomers.

The peroxide content in the organic solvent is preferably 0.8 mmol/L or less, and more preferably substantially free of peroxide.

The content of the solvent in the coloring composition is preferably 10 to 95% by mass, more preferably 20 to 90% by mass, and even more preferably 30 to 90% by mass.

Furthermore, from the viewpoint of environmental regulations, it is preferable that the coloring composition of the present invention is substantially free of environmentally regulated substances. In the present invention, substantially free of environmentally regulated substances means that the content of environmentally regulated substances in the coloring composition is 50 ppm by mass or less, preferably 30 ppm by mass or less, more preferably 10 ppm by mass or less, and particularly preferably 1 ppm by mass or less. Examples of environmentally regulated substances include benzene; alkylbenzenes such as toluene and xylene; and halogenated benzenes such as chlorobenzene. These substances are registered as environmentally regulated substances under the REACH (Registration Evaluation Authorization and Restriction of Chemicals) regulations, the PRTR (Pollutant Release and Transfer Register) Act, the VOC (Volatile Organic Compounds) regulations, etc., and their usage and handling methods are strictly regulated. These compounds may be used as solvents when producing each component used in the coloring composition, and may be mixed into the coloring composition as a residual solvent. From the viewpoint of human safety and environmental consideration, it is preferable to reduce these substances as much as possible. As a method for reducing the environmentally regulated substances, a method of reducing the environmentally regulated substances by heating or reducing the pressure in the system to a temperature above the boiling point of the environmentally regulated substances and distilling off the environmentally regulated substances from the system can be mentioned. In addition, when distilling off a small amount of environmentally regulated substances, it is useful to perform azeotropy with a solvent having a boiling point equivalent to that of the solvent in question in order to increase efficiency. In addition, when a radically polymerizable compound is contained, a polymerization inhibitor or the like may be added and then distilled off under reduced pressure in order to suppress the radical polymerization reaction from proceeding during distillation under reduced pressure and causing crosslinking between molecules. These distillation methods can be performed at any stage, such as the stage of the raw materials, the stage of the product obtained by reacting the raw materials (for example, a resin solution or a polyfunctional monomer solution after polymerization), or the stage of a colored composition prepared by mixing these compounds.

<<Polymerizable compound>>
The coloring composition of the present invention preferably contains a polymerizable compound. Examples of the polymerizable compound include compounds having an ethylenically unsaturated bond-containing group. Examples of the ethylenically unsaturated bond-containing group include vinyl A group, a (meth)allyl group, a (meth)acryloyl group, etc. The polymerizable compound used in the present invention is preferably a radical polymerizable compound.

The polymerizable compound may be in any chemical form, such as a monomer, prepolymer, or oligomer, but is preferably a monomer. The molecular weight of the polymerizable compound is preferably 100 to 3,000. The upper limit is more preferably 2,000 or less, and even more preferably 1,500 or less. The lower limit is more preferably 150 or more, and even more preferably 250 or more.

The polymerizable compound is preferably a compound containing 3 or more ethylenically unsaturated bond-containing groups, more preferably a compound containing 3 to 15 ethylenically unsaturated bond-containing groups, and even more preferably a compound containing 3 to 6 ethylenically unsaturated bond-containing groups. The polymerizable compound is preferably a 3-15 functional (meth)acrylate compound, and more preferably a 3-6 functional (meth)acrylate compound. Specific examples of the polymerizable compound include the compounds described in paragraphs 0075 to 0083 of WO 2022/065215.

Preferred polymerizable compounds include dipentaerythritol tri(meth)acrylate (commercially available product is KAYARAD D-330; manufactured by Nippon Kayaku Co., Ltd.), dipentaerythritol tetra(meth)acrylate (commercially available product is KAYARAD D-320; manufactured by Nippon Kayaku Co., Ltd.), dipentaerythritol penta(meth)acrylate (commercially available product is KAYARAD D-310; manufactured by Nippon Kayaku Co., Ltd.), dipentaerythritol hexa(meth)acrylate (commercially available products are KAYARAD DPHA; manufactured by Nippon Kayaku Co., Ltd., and NK Ester A-DPH-12E; manufactured by Shin-Nakamura Chemical Co., Ltd.), and compounds in which the (meth)acryloyl groups are bonded via ethylene glycol and/or propylene glycol residues (e.g., SR454, SR499, commercially available from Sartomer Corporation). Examples of the polymerizable compound include diglycerol EO (ethylene oxide) modified (meth)acrylate (commercially available product is M-460; manufactured by Toagosei Co., Ltd.), pentaerythritol tetraacrylate (NK Ester A-TMMT, manufactured by Shin-Nakamura Chemical Co., Ltd.), 1,6-hexanediol diacrylate (KAYARAD HDDA, manufactured by Nippon Kayaku Co., Ltd.), RP-1040 (manufactured by Nippon Kayaku Co., Ltd.), and Aronix TO-2349 (manufactured by Toagosei Co., Ltd.). ), NK Oligo UA-7200 (Shin-Nakamura Chemical Co., Ltd.), DPHA-40H (Nippon Kayaku Co., Ltd.), UA-306H, UA-306T, UA-306I, AH-600, T-600, AI-600, LINC-202UA (Kyoeisha Chemical Co., Ltd.), 8UH-1006, 8UH-1012 (all manufactured by Taisei Fine Chemical Co., Ltd.), Light Acrylate POB-A0 (Kyoeisha Chemical Co., Ltd.), etc. can also be used.

The content of the polymerizable compound in the total solid content of the coloring composition is preferably 1 to 35% by mass. The upper limit is preferably 30% by mass or less, and more preferably 25% by mass or less. The lower limit is preferably 2% by mass or more, and more preferably 5% by mass or more. The coloring composition of the present invention may contain only one type of polymerizable compound, or may contain two or more types. When two or more types of polymerizable compounds are contained, it is preferable that the total amount thereof is within the above range.

<<Photopolymerization initiator>>
The coloring composition of the present invention may contain a photopolymerization initiator. When the coloring composition of the present invention contains a polymerizable compound, it is preferable that the coloring composition of the present invention further contains a photopolymerization initiator. The photopolymerization initiator is not particularly limited and can be appropriately selected from known photopolymerization initiators. For example, a compound having photosensitivity to light rays in the ultraviolet range to the visible range is preferable. The photopolymerization initiator is preferably a photoradical polymerization initiator.

Photopolymerization initiators include halogenated hydrocarbon derivatives (e.g., compounds having a triazine skeleton, compounds having an oxadiazole skeleton, etc.), acylphosphine compounds, hexaarylbiimidazole compounds, oxime compounds, organic peroxides, thio compounds, ketone compounds, aromatic onium salts, α-hydroxyketone compounds, α-aminoketone compounds, etc. From the viewpoint of exposure sensitivity, the photopolymerization initiator is preferably a trihalomethyltriazine compound, a benzyl dimethyl ketal compound, an α-hydroxyketone compound, an α-aminoketone compound, an acylphosphine compound, a phosphine oxide compound, a metallocene compound, an oxime compound, a hexaarylbiimidazole compound, an onium compound, a benzothiazole compound, a benzophenone compound, an acetophenone compound, a cyclopentadiene-benzene-iron complex, a halomethyloxadiazole compound, or a 3-aryl substituted coumarin compound, more preferably a compound selected from an oxime compound, an α-hydroxyketone compound, an α-aminoketone compound, and an acylphosphine compound, and even more preferably an oxime compound. In addition, examples of the photopolymerization initiator include the compounds described in paragraphs 0065 to 0111 of JP 2014-130173 A, the compounds described in Japanese Patent No. 6301489 A, and the compounds described in MATERIAL STAGE 37 to 60p, vol. 19, No. 3, 2019, a photopolymerization initiator described in WO 2018/221177, a photopolymerization initiator described in WO 2018/110179, a photopolymerization initiator described in JP 2019-043864 A, a photopolymerization initiator described in JP 2019-044030 A, a peroxide-based initiator described in JP 2019-167313 A, an aminoacetophenone-based initiator having an oxazolidine group described in JP 2020-055992 A, an oxime-based photopolymerization initiator described in JP 2013-190459 A, a polymer described in JP 2020-172619 A, a compound represented by formula 1 described in WO 2020/152120 A, JP 2021-181406 Compounds described in JP 2022-013379 A, photopolymerization initiators described in JP 2022-015747 A, compounds represented by formula (1) described in JP 2022-015747 A, fluorine-containing fluorene oxime ester photoinitiators described in JP 2021-507058 A, initiators described in China Patent Application Publication No. 110764367, initiators described in JP 2022-518535 A, initiators described in WO 2021/175855, compounds described in Taiwan Patent Application Publication No. 202200534, compounds described in JP 2022-078550 A, compounds described in Korean Patent Publication No. 10-2017-0087330, compounds described in WO 2022/075452, and the like.

Specific examples of hexaarylbiimidazole compounds include 2,2',4-tris(2-chlorophenyl)-5-(3,4-dimethoxyphenyl)-4,5-diphenyl-1,1'-biimidazole.

Commercially available α-hydroxyketone compounds include Omnirad 184, Omnirad 1173, Omnirad 2959, Omnirad 127 (all manufactured by IGM Resins B.V.), Irgacure 184, Irgacure 1173, Irgacure 2959, Irgacure 127 (all manufactured by BASF), etc. Commercially available α-aminoketone compounds include Omnirad 907, Omnirad 369, Omnirad 369E, Omnirad 379EG (all manufactured by IGM Resins B.V.), Irgacure 907, Irgacure 369, Irgacure 369E, Irgacure 379EG (all manufactured by BASF), etc. Commercially available acylphosphine compounds include Omnirad 819, Omnirad TPO (all manufactured by IGM Resins B.V.), Irgacure 819, Irgacure TPO (all manufactured by BASF), etc.

Examples of oxime compounds include the compound described in paragraph 0142 of WO 2022/085485, the compound described in Japanese Patent No. 5,430,746, the compound described in Japanese Patent No. 5,647,738, the compound represented by general formula (1) and the compounds described in paragraphs 0022 to 0024 of JP 2021-173858 A, the compound represented by general formula (1) and the compounds described in paragraphs 0117 to 0120 of JP 2021-170089 A, and the like. Specific examples of the oxime compound include 3-benzoyloxyiminobutan-2-one, 3-acetoxyiminobutan-2-one, 3-propionyloxyiminobutan-2-one, 2-acetoxyiminopentan-3-one, 2-acetoxyimino-1-phenylpropan-1-one, 2-benzoyloxyimino-1-phenylpropan-1-one, 3-(4-toluenesulfonyloxy)iminobutan-2-one, 2-ethoxycarbonyloxyimino-1-phenylpropan-1-one, 1-[4-(phenylthio)phenyl]-3-cyclohexyl-propane-1,2-dione-2-(O-acetyloxime), and the like. Commercially available products include Irgacure OXE01, Irgacure OXE02, Irgacure OXE03, and Irgacure OXE04 (all manufactured by BASF), TR-PBG-301, TR-PBG-304, and TR-PBG-327 (manufactured by TRONLY), and Adeka Optomer N-1919 (manufactured by ADEKA Corporation, photopolymerization initiator 2 described in JP 2012-014052 A). In addition, it is also preferable to use a compound that is not colorable or a compound that is highly transparent and does not easily discolor as the oxime compound. Commercially available products include Adeka Arcles NCI-730, NCI-831, and NCI-930 (all manufactured by ADEKA Corporation).

As the photopolymerization initiator, an oxime compound having a fluorene ring, an oxime compound having a skeleton in which at least one benzene ring of a carbazole ring is replaced with a naphthalene ring, an oxime compound having a fluorine atom, an oxime compound having a nitro group, an oxime compound having a benzofuran skeleton, an oxime compound in which a substituent having a hydroxyl group is bonded to a carbazole skeleton, or a compound described in paragraphs 0143 to 0149 of WO 2022/085485 can also be used.

Specific examples of oxime compounds that are preferably used in the present invention are shown below, but the present invention is not limited to these.

The oxime compound is preferably a compound having a maximum absorption wavelength in the wavelength range of 350 to 500 nm, more preferably a compound having a maximum absorption wavelength in the wavelength range of 360 to 480 nm. From the viewpoint of sensitivity, the molar absorption coefficient of the oxime compound at a wavelength of 365 nm or 405 nm is preferably high, more preferably 1000 to 300,000, even more preferably 2000 to 300,000, and particularly preferably 5000 to 200,000. The molar absorption coefficient of the compound can be measured using a known method. For example, it is preferable to measure using a spectrophotometer (Varian Cary-5 spectrophotometer) at a concentration of 0.01 g/L using ethyl acetate as a solvent.

As the photopolymerization initiator, a bifunctional or trifunctional or higher functional photoradical polymerization initiator may be used. By using such a photoradical polymerization initiator, two or more radicals are generated from one molecule of the photoradical polymerization initiator, so good sensitivity can be obtained. In addition, when a compound with an asymmetric structure is used, crystallinity is reduced and solubility in solvents is improved, making it less likely to precipitate over time, and the stability over time of the coloring composition can be improved. Specific examples of bifunctional or trifunctional or higher functional photoradical polymerization initiators include the compounds described in paragraph 0148 of WO 2022/065215.

The content of the photopolymerization initiator in the total solid content of the coloring composition is preferably 0.1 to 30% by mass. The lower limit is preferably 0.5% by mass or more, and more preferably 1% by mass or more. The upper limit is preferably 20% by mass or less, and more preferably 15% by mass or less. In the coloring composition of the present invention, only one type of photopolymerization initiator may be used, or two or more types may be used. When two or more types are used, it is preferable that the total amount thereof is within the above range.

<<Infrared absorbent>>
The coloring composition of the present invention may further contain an infrared absorbing agent. For example, when an infrared transmission filter is formed using the coloring composition of the present invention, the wavelength of light transmitted through the film obtained by adding an infrared absorbing agent to the coloring composition can be shifted to a longer wavelength side. The infrared absorbing agent is preferably a compound having a maximum absorption wavelength on the longer wavelength side than a wavelength of 700 nm. The infrared absorbing agent is preferably a compound having a maximum absorption wavelength in the range of more than 700 nm and not more than 1800 nm. In addition, the ratio A ¹ /A ² between the absorbance A ¹ at a wavelength of 500 nm of the infrared absorbing agent and the absorbance A ² at the maximum absorption wavelength is preferably 0.08 or less, more preferably 0.04 or less.

Infrared absorbents include pyrrolopyrrole compounds, cyanine compounds, squarylium compounds, phthalocyanine compounds, naphthalocyanine compounds, quaterrylene compounds, merocyanine compounds, croconium compounds, oxonol compounds, iminium compounds, dithiol compounds, triarylmethane compounds, pyrromethene compounds, azomethine compounds, anthraquinone compounds, dibenzofuranone compounds, dithiolene metal complexes, metal oxides, metal borides, and the like. Specific examples of these include the compounds described in paragraphs 0114 to 0121 of WO 2022/065215. In addition, as infrared absorbents, the compounds described in paragraph 0121 of WO 2022/065215, squarylium compounds described in JP 2020-075959 A, and copper complexes described in Korean Patent Publication No. 10-2019-0135217 can also be used. In addition, the croconate compound described in JP 2021-195515 A, the infrared absorber described in JP 2022-022070 A, and the croconium compound described in WO 2019/021767 A can also be used.

As the infrared absorbing agent, tungsten oxide represented by the following formula described in paragraph 0025 of European Patent No. 3628645 can also be used.
M ¹ _a M ² _b W _c O _d (P(O) _n R _m ) _e
M ¹ and M ² each represent an ammonium cation or a metal cation, a is 0.01 to 0.5, b is 0 to 0.5, c is 1, d is 2.5 to 3, e is 0.01 to 0.75, n is 1, 2 or 3, m is 1, 2 or 3, and R represents a hydrocarbon group which may have a substituent.

The content of the infrared absorbing agent in the total solid content of the coloring composition is preferably 1 to 40% by mass. The lower limit is preferably 2% by mass or more, more preferably 5% by mass or more, and even more preferably 10% by mass or more. The upper limit is preferably 30% by mass or less, and more preferably 25% by mass or less. The coloring composition of the present invention may contain only one type of infrared absorbing agent, or may contain two or more types. When two or more types of infrared absorbing agents are contained, it is preferable that the total amount thereof is within the above range.

<<Compound Having Cyclic Ether Group>>
The coloring composition of the present invention may contain a compound having a cyclic ether group. Examples of the cyclic ether group include an epoxy group and an oxetanyl group. The compound having a cyclic ether group is preferably a compound having an epoxy group (hereinafter also referred to as an epoxy compound). Examples of the epoxy compound include compounds having one or more epoxy groups in one molecule, and compounds having two or more epoxy groups are preferred. The epoxy compound is preferably a compound having 1 to 100 epoxy groups in one molecule. The upper limit of the epoxy groups contained in the epoxy compound can be, for example, 10 or less, or 5 or less. The lower limit of the epoxy groups contained in the epoxy compound is preferably 2 or more. Examples of compounds having a cyclic ether group include those described in paragraphs 0034 to 0036 of JP-A-2013-011869, 0147 to 0156 of JP-A-2014-043556, and 0085 to 0092 of JP-A-2014-089408. Compounds described in JP-A-2017-179172, xanthene-type epoxy resins described in JP-A-2021-195421, and xanthene-type epoxy resins described in JP-A-2021-195422 can also be used.

The compound having a cyclic ether group may be a low molecular weight compound (e.g., a molecular weight of less than 2000, or even less than 1000) or a high molecular weight compound (macromolecule) (e.g., a molecular weight of 1000 or more, or in the case of a polymer, a weight average molecular weight of 1000 or more). The weight average molecular weight of the compound having an epoxy group is preferably 200 to 100,000, more preferably 500 to 50,000. The upper limit of the weight average molecular weight is more preferably 10,000 or less, particularly preferably 5,000 or less, and even more preferably 3,000 or less.

Commercially available compounds having a cyclic ether group include, for example, EHPE3150 (manufactured by Daicel Corporation), EPICLON N-695 (manufactured by DIC Corporation), Marproof G-0150M, G-0105SA, G-0130SP, G-0250SP, G-1005S, G-1005SA, G-1010S, G-2050M, G-01100, and G-01758 (all manufactured by NOF Corporation, epoxy group-containing polymers).

The content of the compound having a cyclic ether group in the total solid content of the coloring composition is preferably 0.1 to 20% by mass. The lower limit is preferably 0.5% by mass or more, and more preferably 1% by mass or more. The upper limit is preferably 15% by mass or less, and more preferably 10% by mass or less. Only one type of compound having a cyclic ether group may be used, or two or more types may be used. When two or more types are used, it is preferable that the total amount thereof is within the above range.

<<Polyalkyleneimine>>
The coloring composition of the present invention may also contain a polyalkyleneimine. The polyalkyleneimine is used, for example, as a dispersing aid for pigments. The dispersing aid is a material for enhancing the dispersibility of pigments in a coloring composition. The polyalkyleneimine is a polymer obtained by ring-opening polymerization of an alkyleneimine. The polyalkyleneimine is a polymer having a branched structure containing a primary amino group, a secondary amino group, and a tertiary amino group. The number of carbon atoms in the alkyleneimine is preferably 2 to 6, more preferably 2 to 4, even more preferably 2 or 3, and particularly preferably 2.

The molecular weight of the polyalkyleneimine is preferably 200 or more, more preferably 250 or more. The upper limit is preferably 100,000 or less, more preferably 50,000 or less, even more preferably 10,000 or less, and particularly preferably 2,000 or less. In addition, when the molecular weight value of the polyalkyleneimine can be calculated from the structural formula, the molecular weight of the polyalkyleneimine is the value calculated from the structural formula. On the other hand, when the molecular weight of the specific amine compound cannot be calculated from the structural formula or is difficult to calculate, the number average molecular weight value measured by the boiling point elevation method is used. In addition, when the molecular weight cannot be measured by the boiling point elevation method or is difficult to measure, the number average molecular weight value measured by the viscosity method is used. In addition, when the molecular weight cannot be measured by the viscosity method or is difficult to measure by the viscosity method, the number average molecular weight value measured in polystyrene equivalent value by GPC (gel permeation chromatography) method is used.

The amine value of the polyalkyleneimine is preferably 5 mmol/g or more, more preferably 10 mmol/g or more, and even more preferably 15 mmol/g or more.

Specific examples of alkyleneimines include ethyleneimine, propyleneimine, 1,2-butyleneimine, and 2,3-butyleneimine, with ethyleneimine or propyleneimine being preferred, and ethyleneimine being more preferred. The polyalkyleneimine is particularly preferably polyethyleneimine. Furthermore, the polyethyleneimine preferably contains primary amino groups in an amount of 10 mol% or more, more preferably 20 mol% or more, and even more preferably 30 mol% or more, based on the total of the primary amino groups, secondary amino groups, and tertiary amino groups. Commercially available polyethyleneimines include Epomin SP-003, SP-006, SP-012, SP-018, SP-200, and P-1000 (all manufactured by Nippon Shokubai Co., Ltd.).

The content of polyalkyleneimine in the total solid content of the coloring composition is preferably 0.1 to 5 mass%. The lower limit is preferably 0.2 mass% or more, more preferably 0.5 mass% or more, and even more preferably 1 mass% or more. The upper limit is preferably 4.5 mass% or less, more preferably 4 mass% or less, and even more preferably 3 mass% or less. The content of polyalkyleneimine is preferably 0.5 to 20 mass parts per 100 mass parts of pigment. The lower limit is preferably 0.6 mass% or more, more preferably 1 mass% or more, and even more preferably 2 mass% or more. The upper limit is preferably 10 mass% or less, and even more preferably 8 mass% or less. Only one type of polyalkyleneimine may be used, or two or more types may be used. When two or more types are used, the total amount thereof is preferably within the above range.

<<Curing accelerator>>
The coloring composition of the present invention may contain a curing accelerator. Examples of the curing accelerator include a thiol compound, a methylol compound, an amine compound, a phosphonium salt compound, an amidine salt compound, an amide compound, a base generator, an isocyanate compound, an alkoxysilane compound, and an onium salt compound. Specific examples of the curing accelerator include the compound described in paragraph 0164 of International Publication No. 2022/085485 and the compound described in JP-A-2021-181406. The content of the curing accelerator in the total solid content of the coloring composition is preferably 0.3 to 8.9% by mass, more preferably 0.8 to 6.4% by mass.

<<Ultraviolet absorbing agent>>
The coloring composition of the present invention may contain an ultraviolet absorber. Examples of ultraviolet absorbers include conjugated diene compounds, aminodiene compounds, salicylate compounds, benzophenone compounds, benzotriazole compounds, acrylonitrile compounds, hydroxyphenyltriazine compounds, indole compounds, triazine compounds, and dibenzoyl compounds. Specific examples of such compounds include the compounds described in paragraph 0179 of International Publication No. 2022/085485, the reactive triazine ultraviolet absorbers described in JP-A-2021-178918, the ultraviolet absorbers described in JP-A-2022-007884, and the compounds described in Korean Patent Publication No. 10-2022-0014454. The content of the ultraviolet absorber in the total solid content of the coloring composition is preferably 0.01 to 10% by mass, more preferably 0.01 to 5% by mass. In the present invention, only one type of ultraviolet absorber may be used, or two or more types may be used. When two or more types are used, it is preferable that the total amount is within the above range.

<<Polymerization inhibitor>>
The coloring composition of the present invention may contain a polymerization inhibitor. Examples of the polymerization inhibitor include hydroquinone, p-methoxyphenol, di-tert-butyl-p-cresol, pyrogallol, tert-butylcatechol, benzoquinone, 4,4'-thiobis(3-methyl-6-tert-butylphenol), 2,2'-methylenebis(4-methyl-6-t-butylphenol), and N-nitrosophenylhydroxyamine salts (ammonium salts, cerous salts, etc.). Among these, p-methoxyphenol is preferred. The content of the polymerization inhibitor in the total solid content of the coloring composition is preferably 0.0001 to 5% by mass. The polymerization inhibitor may be one type or two or more types. In the case of two or more types, the total amount is preferably within the above range.

<<Silane coupling agents>>
The coloring composition of the present invention may contain a silane coupling agent. Examples of the silane coupling agent include silane compounds having a hydrolyzable group, and it is preferable that the silane coupling agent is a silane compound having a hydrolyzable group and other functional groups. The hydrolyzable group refers to a substituent that is directly bonded to a silicon atom and can generate a siloxane bond by at least one of a hydrolysis reaction and a condensation reaction. Examples of the hydrolyzable group include a halogen atom, an alkoxy group, and an acyloxy group, and an alkoxy group is preferable. That is, the silane coupling agent is preferably a compound having an alkoxysilyl group. In addition, examples of functional groups other than the hydrolyzable group include a vinyl group, a (meth)allyl group, a (meth)acryloyl group, a mercapto group, an epoxy group, an oxetanyl group, an amino group, a ureido group, a sulfide group, an isocyanate group, and a phenyl group, and an amino group, a (meth)acryloyl group, and an epoxy group are preferable. Specific examples of the silane coupling agent include the compounds described in paragraph 0177 of International Publication No. 2022/085485 and the compounds described in JP-A-2019-183020. The content of the silane coupling agent in the total solid content of the coloring composition is preferably 0.01 to 15.0% by mass, more preferably 0.05 to 10.0% by mass. The silane coupling agent may be one type or two or more types. In the case of two or more types, it is preferable that the total amount is within the above range.

<<Surfactants>>
The coloring composition of the present invention may contain a surfactant. As the surfactant, various surfactants such as fluorine-based surfactants, nonionic surfactants, cationic surfactants, anionic surfactants, and silicone-based surfactants may be used. The surfactant is preferably a silicone-based surfactant or a fluorine-based surfactant. For the surfactant, reference may be made to the surfactants described in paragraphs 0238 to 0245 of WO 2015/166779, the contents of which are incorporated herein by reference.

As fluorosurfactants, the compounds described in paragraphs 0167 to 0173 of WO 2022/085485 can be used.

Nonionic surfactants include the compounds described in paragraph 0174 of WO 2022/085485.

Silicone surfactants include DOWSIL SH8400, SH8400 FLUID, FZ-2122, 67 Additive, 74 Additive, M Additive, SF 8419 OIL (all manufactured by Dow Toray Co., Ltd.), TSF-4300, TSF-4445, TSF-4460, and TSF-4452 (all manufactured by Momen Co., Ltd.). Examples include BYK-307, BYK-322, BYK-323, BYK-330, BYK-333, BYK-3760, and BYK-UV3510 (manufactured by BYK-Chemie), etc.

Furthermore, the silicone surfactant may also be a compound having the following structure:

The content of the surfactant in the total solid content of the coloring composition is preferably 0.001% by mass to 5.0% by mass, and more preferably 0.005% by mass to 3.0% by mass. The surfactant may be one type or two or more types. When two or more types are used, it is preferable that the total amount is within the above range.

<<Antioxidants>>
The coloring composition of the present invention may contain an antioxidant. Examples of the antioxidant include phenolic compounds, phosphite compounds, and thioether compounds. As the phenolic compound, any phenolic compound known as a phenolic antioxidant may be used. A preferred phenolic compound is a hindered phenolic compound. A compound having a substituent at the site (ortho position) adjacent to the phenolic hydroxy group is preferred. As the aforementioned substituent, a substituted or unsubstituted alkyl group having 1 to 22 carbon atoms is preferred. In addition, the antioxidant is also preferably a compound having a phenolic group and a phosphite group in the same molecule. In addition, a phosphorus-based antioxidant may also be suitably used as the antioxidant. Examples of phosphorus-based antioxidants include tris[2-[[2,4,8,10-tetrakis(1,1-dimethylethyl)dibenzo[d,f][1,3,2]dioxaphosphepin-6-yl]oxy]ethyl]amine, tris[2-[(4,6,9,11-tetra-tert-butyldibenzo[d,f][1,3,2]dioxaphosphepin-2-yl)oxy]ethyl]amine, and ethylbis(2,4-di-tert-butyl-6-methylphenyl)phosphite. Commercially available antioxidants include, for example, Adeka STAB AO-20, Adeka STAB AO-30, Adeka STAB AO-40, Adeka STAB AO-50, Adeka STAB AO-50F, Adeka STAB AO-60, Adeka STAB AO-60G, Adeka STAB AO-80, and Adeka STAB AO-330 (manufactured by ADEKA Corporation). In addition, the antioxidant may be a compound described in paragraphs 0023 to 0048 of Japanese Patent No. 6268967, a compound described in International Publication No. WO 2017/006600, a compound described in International Publication No. WO 2017/164024, or a compound described in Korean Patent Publication No. 10-2019-0059371. The content of the antioxidant in the total solid content of the coloring composition is preferably 0.01 to 20 mass%, more preferably 0.3 to 15 mass%. Only one type of antioxidant may be used, or two or more types may be used. When two or more types are used, it is preferable that the total amount is in the above range.

<<Other ingredients>>
The coloring composition of the present invention may contain, as necessary, a sensitizer, a plasticizer, and other auxiliaries (for example, conductive particles, fillers, defoamers, flame retardants, leveling agents, peeling promoters, fragrances, surface tension regulators, chain transfer agents, etc.). By appropriately incorporating these components, properties such as film properties can be adjusted. As these components, the compounds described in paragraph 0182 of WO 2022/085485 can be used.

The coloring composition of the present invention may contain a metal oxide in order to adjust the refractive index of the resulting film. Examples of the metal oxide include TiO ₂ , ZrO ₂ , Al ₂ O ₃ , and SiO ₂ . The primary particle size of the metal oxide is preferably 1 to 100 nm, more preferably 3 to 70 nm, and even more preferably 5 to 50 nm. The metal oxide may have a core-shell structure. In this case, the core may be hollow.

The coloring composition of the present invention may contain a light resistance improver. Examples of the light resistance improver include the compounds described in paragraph 0183 of WO 2022/085485.

It is also preferable that the coloring composition of the present invention is substantially free of terephthalic acid ester. Here, "substantially free of" means that the content of terephthalic acid ester in the total amount of the coloring composition is 1000 mass ppb or less, more preferably 100 mass ppb or less, and particularly preferably zero.
From the viewpoint of environmental regulations, the colored composition of the present invention preferably has a melamine content of 10,000 ppm by mass or less.

The coloring composition of the present invention preferably has a free metal content of 100 ppm or less, more preferably 50 ppm or less. The free halogen content is preferably 100 ppm or less, more preferably 50 ppm or less. Methods for reducing free metals and halogens in the coloring composition include washing with ion-exchanged water, filtration, ultrafiltration, and purification with ion-exchange resins.

From the viewpoint of environmental regulations, the use of perfluoroalkylsulfonic acid and its salts, and perfluoroalkylcarboxylic acid and its salts may be restricted. In the coloring composition of the present invention, when the content of the above-mentioned compounds is reduced, the content of perfluoroalkylsulfonic acid (particularly perfluoroalkylsulfonic acid having a perfluoroalkyl group with 6 to 8 carbon atoms) and its salts, and perfluoroalkylcarboxylic acid (particularly perfluoroalkyl carboxylic acid having a perfluoroalkyl group with 6 to 8 carbon atoms) and its salts is preferably in the range of 0.01 ppb to 1,000 ppb, more preferably in the range of 0.05 ppb to 500 ppb, and even more preferably in the range of 0.1 ppb to 300 ppb, based on the total solid content of the coloring composition. The coloring composition of the present invention may be substantially free of perfluoroalkylsulfonic acid and its salts, and perfluoroalkylcarboxylic acid and its salts. For example, a coloring composition that is substantially free of perfluoroalkylsulfonic acid and its salts, and perfluoroalkylcarboxylic acid and its salts may be selected by using a compound that can be a substitute for perfluoroalkylsulfonic acid and its salts, and a compound that can be a substitute for perfluoroalkylcarboxylic acid and its salts. Examples of compounds that can be a substitute for regulated compounds include compounds that are excluded from the scope of regulation due to the difference in the number of carbon atoms in the perfluoroalkyl group. However, the above content does not prevent the use of perfluoroalkylsulfonic acid and its salts, and perfluoroalkylcarboxylic acid and its salts. The coloring composition of the present invention may contain perfluoroalkylsulfonic acid and its salts, and perfluoroalkylcarboxylic acid and its salts, within the maximum allowable range.

The water content of the coloring composition of the present invention is usually 3% by mass or less, preferably 0.01 to 1.5% by mass, and more preferably in the range of 0.1 to 1.0% by mass. The water content can be measured by the Karl Fischer method.

The coloring composition of the present invention can be used with its viscosity adjusted for the purpose of adjusting the film surface state (flatness, etc.), adjusting the film thickness, etc. The viscosity value can be appropriately selected as needed, but for example, it is preferably 0.3 mPa·s to 50 mPa·s at 25°C, and more preferably 0.5 mPa·s to 20 mPa·s. The viscosity can be measured, for example, using a cone-plate type viscometer with the temperature adjusted to 25°C.

<<Storage container>>
The container for storing the coloring composition is not particularly limited, and a known container can be used. In addition, the container described in paragraph 0187 of WO 2022/085485 can be used as the container.

<Method of preparing coloring composition>
The coloring composition of the present invention can be prepared by mixing the above-mentioned components. When preparing the coloring composition, all the components may be dissolved and/or dispersed in a solvent at the same time to prepare the coloring composition, or, if necessary, each component may be appropriately prepared as two or more solutions or dispersions, which are mixed at the time of use (at the time of application) to prepare the coloring composition.

In addition, it is preferable that the preparation of the coloring composition includes a process for dispersing the pigment. In the process for dispersing the pigment, examples of mechanical forces used to disperse the pigment include compression, squeezing, impact, shear, and cavitation. Specific examples of these processes include bead mills, sand mills, roll mills, ball mills, paint shakers, microfluidizers, high-speed impellers, sand grinders, flow jet mixers, high-pressure wet atomization, and ultrasonic dispersion. In addition, in the grinding of the pigment in a sand mill (bead mill), it is preferable to use beads with a small diameter, increase the bead packing rate, and perform the process under conditions that increase the grinding efficiency. In addition, it is preferable to remove coarse particles by filtration, centrifugation, or the like after the grinding process. In addition, the process and dispersing machine for dispersing the pigment can be suitably used as described in "Dispersion Technology Encyclopedia, published by Joho Kika Co., Ltd., July 15, 2005" or "Dispersion Technology and Industrial Applications Focused on Suspension (Solid/Liquid Dispersion System) - Comprehensive Data Collection, published by Management Development Center Publishing Department, October 10, 1978", and in paragraph 0022 of JP2015-157893A. In addition, in the process for dispersing the pigment, a salt milling process may be performed to refine the particles. For the materials, equipment, processing conditions, etc. used in the salt milling process, the descriptions in, for example, JP2015-194521A and JP2012-046629A can be referred to.

When preparing the coloring composition, it is preferable to filter the coloring composition with a filter for the purpose of removing foreign matter and reducing defects. Examples of the types of filters and filtration methods used for filtration include the filters and filtration methods described in paragraphs 0196 to 0199 of WO 2022/085485.

<Membrane>
The film of the present invention is obtained from the coloring composition of the present invention described above. The film of the present invention can be used for optical filters such as color filters and infrared transmission filters.

The thickness of the film of the present invention can be adjusted appropriately depending on the purpose. For example, the thickness is preferably 20 μm or less, more preferably 10 μm or less, and even more preferably 5 μm or less. The lower limit of the film thickness is preferably 0.1 μm or more, more preferably 0.2 μm or more, and even more preferably 0.3 μm or more.

When the film of the present invention is used as a color filter, the film of the present invention preferably has a green, red, blue, cyan, magenta or yellow hue, more preferably has a green, red or yellow hue, and even more preferably has a red hue. The film of the present invention can also be preferably used as a colored pixel of a color filter. Examples of the colored pixel include red pixels, green pixels, blue pixels, magenta pixels, cyan pixels, and yellow pixels, and red pixels, green pixels, or yellow pixels are preferred, red pixels, green pixels, or yellow pixels are more preferred, and red pixels are even more preferred.

When the film of the present invention is used as an infrared transmission filter, the film of the present invention preferably has, for example, any one of the following spectral characteristics (1) to (4).
(1): The maximum light transmittance in the thickness direction of the film in the wavelength range of 400 to 640 nm is 20% or less (preferably 15% or less, more preferably 10% or less), and the minimum light transmittance in the thickness direction of the film in the wavelength range of 800 to 1300 nm is 70% or more (preferably 75% or more, more preferably 80% or more). A film having such spectral characteristics can block light in the wavelength range of 400 to 640 nm and transmit light with a wavelength of more than 700 nm.
(2): A film in which the maximum light transmittance in the thickness direction of the film in the wavelength range of 400 to 750 nm is 20% or less (preferably 15% or less, more preferably 10% or less) and the minimum light transmittance in the thickness direction of the film in the wavelength range of 900 to 1300 nm is 70% or more (preferably 75% or more, more preferably 80% or more). A film having such spectral characteristics can block light in the wavelength range of 400 to 750 nm and transmit light with a wavelength of more than 850 nm.
(3): A film in which the maximum light transmittance in the thickness direction of the film in the wavelength range of 400 to 830 nm is 20% or less (preferably 15% or less, more preferably 10% or less) and the minimum light transmittance in the thickness direction of the film in the wavelength range of 1000 to 1300 nm is 70% or more (preferably 75% or more, more preferably 80% or more). A film having such spectral characteristics can block light in the wavelength range of 400 to 830 nm and transmit light with a wavelength of more than 940 nm.
(4): A film in which the maximum light transmittance in the thickness direction of the film in the wavelength range of 400 to 950 nm is 20% or less (preferably 15% or less, more preferably 10% or less) and the minimum light transmittance in the thickness direction of the film in the wavelength range of 1100 to 1300 nm is 70% or more (preferably 75% or more, more preferably 80% or more). A film having such spectral characteristics can block light in the wavelength range of 400 to 950 nm and transmit light with a wavelength of more than 1040 nm.

<Membrane manufacturing method>
Next, the method for producing the film of the present invention will be described. The film of the present invention can be produced through a step of applying the coloring composition of the present invention. In the method for producing the film, it is preferable to further include a step of forming a pattern (pixel). Examples of the method for forming the pattern (pixel) include a photolithography method and a dry etching method, and the photolithography method is preferable.

Pattern formation by photolithography preferably includes a step of forming a coloring composition layer on a support using the coloring composition of the present invention, a step of exposing the coloring composition layer in a pattern, and a step of developing and removing the unexposed parts of the coloring composition layer to form a pattern (pixels). If necessary, a step of baking the coloring composition layer (pre-baking step) and a step of baking the developed pattern (pixels) (post-baking step) may be provided.

In the step of forming the coloring composition layer, the coloring composition layer is formed on a support using the coloring composition of the present invention. The support is not particularly limited and can be appropriately selected depending on the application. For example, a glass substrate, a silicon substrate, etc. can be mentioned, and a silicon substrate is preferable. A charge-coupled device (CCD), a complementary metal oxide semiconductor (CMOS), a transparent conductive film, etc. may be formed on the silicon substrate. A black matrix that isolates each pixel may be formed on the silicon substrate. A base layer may be provided on the silicon substrate to improve adhesion with the upper layer, prevent diffusion of substances, or flatten the substrate surface. The surface contact angle of the base layer is preferably 20 to 70° when measured with diiodomethane. It is also preferable that the surface contact angle is 30 to 80° when measured with water.

　A known method can be used to apply the coloring composition. For example, the application method described in paragraph 0207 of WO 2022/085485 can be used.

The colored composition layer formed on the support may be dried (prebaked). When a film is produced by a low-temperature process, prebaking may not be performed. When prebaking is performed, the prebaking temperature is preferably 150°C or less, more preferably 120°C or less, and even more preferably 110°C or less. The lower limit can be, for example, 50°C or more, and can also be 80°C or more. The prebaking time is preferably 10 to 300 seconds, more preferably 40 to 250 seconds, and even more preferably 80 to 220 seconds. Prebaking can be performed using a hot plate, an oven, etc.

Next, the colored composition layer is exposed to light in a pattern (exposure step). For example, the colored composition layer can be exposed to light in a pattern by using a stepper exposure machine or a scanner exposure machine through a mask having a predetermined mask pattern. This allows the exposed parts to be cured.

Radiation (light) that can be used for exposure includes g-rays and i-rays. Light with a wavelength of 300 nm or less (preferably light with a wavelength of 180 to 300 nm) can also be used. Examples of light with a wavelength of 300 nm or less include KrF rays (wavelength 248 nm) and ArF rays (wavelength 193 nm), with KrF rays (wavelength 248 nm) being preferred. Long-wave light sources of 300 nm or more can also be used. As light sources, electrodeless ultraviolet lamp systems and hybrid curing of ultraviolet and infrared rays can be used.

In addition, during exposure, light may be applied continuously or in pulses (pulse exposure). Pulse exposure is an exposure method in which light is applied and paused repeatedly in short cycles (e.g., milliseconds or less).

The irradiation amount (exposure amount) is, for example, preferably 0.03 to 2.5 J/cm ² , more preferably 0.05 to 1.0 J/cm ^2. The oxygen concentration during exposure can be appropriately selected, and in addition to being performed under air, for example, exposure may be performed under a low-oxygen atmosphere with an oxygen concentration of 19 volume% or less (e.g., 15 volume%, 5 volume%, or substantially oxygen-free), or under a high-oxygen atmosphere with an oxygen concentration of more than 21 volume% (e.g., 22 volume%, 30 volume%, or 50 volume%). The exposure illuminance can be appropriately set, and can usually be selected from the range of 1000 W/m ² to 100,000 W/m ² (e.g., 5,000 W/m ² , 15,000 W/m ² , or 35,000 W/m ² ). The oxygen concentration and exposure illuminance may be appropriately combined. For example, an oxygen concentration of 10% by volume and an illuminance of 10,000 W/m ² , and an oxygen concentration of 35% by volume and an illuminance of 20,000 W/m ² , can be used.

Next, the unexposed parts of the coloring composition layer are developed and removed to form a pattern (pixels). The unexposed parts of the coloring composition layer can be developed and removed using a developer. As a result, the coloring composition layer in the unexposed parts in the exposure step dissolves into the developer, and only the photocured parts remain. The temperature of the developer is preferably, for example, 20 to 30°C. The development time is preferably 20 to 180 seconds. In addition, to improve residue removal, the process of shaking off the developer every 60 seconds and then supplying new developer may be repeated several times.

The developer may be an organic solvent or an alkaline developer, with an alkaline developer being preferred. The developer and the washing (rinsing) method after development may be as described in paragraph 0214 of WO 2022/085485.

After development and drying, it is preferable to perform additional exposure processing or heating processing (post-baking). Additional exposure processing and post-baking are curing processing after development to complete curing. The heating temperature in post-baking is, for example, preferably 100 to 240°C, more preferably 200 to 240°C. Post-baking can be performed continuously or batchwise using a heating means such as a hot plate, a convection oven (hot air circulation dryer), or a high-frequency heater to achieve the above conditions for the developed film. When additional exposure processing is performed, it is preferable that the light used for exposure has a wavelength of 400 nm or less. In addition, additional exposure processing may be performed by the method described in Korean Patent Publication No. 10-2017-0122130.

The pattern formation by the dry etching method preferably includes the steps of forming a colored composition layer on a support using the colored composition of the present invention, curing the entire colored composition layer to form a cured layer, forming a photoresist layer on the cured layer, exposing the photoresist layer in a pattern and developing it to form a resist pattern, and dry etching the cured layer using an etching gas with the resist pattern as a mask. In forming the photoresist layer, it is preferable to further perform a pre-bake treatment. In particular, the process of forming the photoresist layer is preferably a form in which a heat treatment after exposure and a heat treatment after development (post-bake treatment) are performed. For the pattern formation by the dry etching method, the description in paragraphs 0010 to 0067 of JP 2013-064993 A can be referred to, and the contents of this specification are incorporated herein.

<Optical filter>
The optical filter of the present invention has the above-mentioned film of the present invention. The types of optical filters include color filters and infrared transmission filters, and the color filter is preferable. The color filter preferably has the film of the present invention as a color pixel of the color filter.

The optical filter may have a protective layer on the surface of the film of the present invention. By providing a protective layer, various functions such as oxygen blocking, low reflection, hydrophilicity/hydrophobicity, and shielding of light of a specific wavelength (ultraviolet rays, near infrared rays, etc.) can be imparted. The thickness of the protective layer is preferably 0.01 to 10 μm, more preferably 0.1 to 5 μm. Methods for forming the protective layer include a method of forming the protective layer by applying a resin composition dissolved in an organic solvent, a chemical vapor deposition method, and a method of attaching a molded resin with an adhesive. The components constituting the protective layer include (meth)acrylic resin, ene-thiol resin, polycarbonate resin, polyether resin, polyarylate resin, polysulfone resin, polyethersulfone resin, polyphenylene resin, polyarylene ether phosphine oxide resin, polyimide resin, polyamideimide resin, polyolefin resin, cyclic olefin resin, polyester resin, styrene resin, polyol resin, polyvinylidene chloride resin, melamine resin, urethane resin, aramid resin, polyamide resin, alkyd resin, epoxy resin, modified silicone resin, fluorine resin, polycarbonate resin, polyacrylonitrile resin, cellulose resin, Si, C, W, Al ₂ O ₃ , Mo, SiO ₂ , Si ₂ N ₄ , etc., and may contain two or more of these components. For example, in the case of a protective layer intended for oxygen blocking, the protective layer preferably contains a polyol resin, SiO ₂ , and Si ₂ N ₄ . In the case of a protective layer intended to reduce reflection, the protective layer preferably contains a (meth)acrylic resin and a fluorine resin.

When forming a protective layer by applying a resin composition, known methods such as spin coating, casting, screen printing, and inkjet can be used as a method for applying the resin composition. Known organic solvents (e.g., propylene glycol 1-monomethyl ether 2-acetate, cyclopentanone, ethyl lactate, etc.) can be used as the organic solvent contained in the resin composition. When forming a protective layer by chemical vapor deposition, known chemical vapor deposition methods (thermal chemical vapor deposition, plasma chemical vapor deposition, photochemical vapor deposition) can be used as the chemical vapor deposition method.

The protective layer may contain additives such as organic or inorganic fine particles, absorbents for light of specific wavelengths (e.g., ultraviolet light, near infrared light, etc.), refractive index adjusters, antioxidants, adhesion agents, and surfactants, as necessary. Examples of organic or inorganic fine particles include polymer fine particles (e.g., silicone resin fine particles, polystyrene fine particles, melamine resin fine particles), titanium oxide, zinc oxide, zirconium oxide, indium oxide, aluminum oxide, titanium nitride, titanium oxynitride, magnesium fluoride, hollow silica, silica, calcium carbonate, and barium sulfate. Known absorbents can be used as absorbents for light of specific wavelengths. The content of these additives can be adjusted as appropriate, but is preferably 0.1 to 70% by mass, and more preferably 1 to 60% by mass, based on the total mass of the protective layer.

The protective layer may also be the one described in paragraphs 0073 to 0092 of JP2017-151176A.

The optical filter may have a structure in which each pixel is embedded in a space partitioned by partitions, for example in a grid pattern.

<Solid-state imaging element>
The solid-state imaging device of the present invention has the above-mentioned film of the present invention. The configuration of the solid-state imaging device is not particularly limited as long as it has the film of the present invention and functions as a solid-state imaging device, and examples thereof include the following configurations.

The substrate has a plurality of photodiodes constituting the light receiving area of a solid-state imaging element (such as a CCD (charge-coupled device) image sensor or a CMOS (complementary metal-oxide semiconductor) image sensor) and a transfer electrode made of polysilicon or the like, a light-shielding film on the photodiodes and the transfer electrodes with only the light receiving portion of the photodiodes open, a device protection film made of silicon nitride or the like formed on the light-shielding film so as to cover the entire light-shielding film and the light receiving portion of the photodiode, and a color filter on the device protection film. Furthermore, the device protection film may have a light-collecting means (e.g., a microlens, etc.; the same applies below) on the device protection film and below the color filter (the side closer to the substrate), or a light-collecting means on the color filter. The color filter may have a structure in which each colored pixel is embedded in a space partitioned by partitions, for example in a lattice shape. In this case, it is preferable that the partitions have a lower refractive index than each colored pixel. Examples of imaging devices having such a structure include those described in JP 2012-227478 A, JP 2014-179577 A, and WO 2018/043654 A. In addition, as shown in JP 2019-211559 A, an ultraviolet absorbing layer may be provided in the structure of the solid-state imaging element to improve light resistance. The imaging device equipped with the solid-state imaging element of the present invention can be used for digital cameras, electronic devices with imaging functions (such as mobile phones), as well as in-vehicle cameras and surveillance cameras.

<Image display device>
The image display device of the present invention has the above-mentioned film of the present invention. Examples of the image display device include liquid crystal display devices and organic electroluminescence display devices. The definition of the image display device and details of each image display device are described, for example, in "Electronic Display Devices" (written by Akio Sasaki, published by Kogyo Chosakai Co., Ltd. in 1990) and "Display Devices" (written by Junsho Ibuki, published by Sangyo Tosho Co., Ltd. in 1989). The liquid crystal display device is described, for example, in "Next Generation Liquid Crystal Display Technology" (edited by Tatsuo Uchida, published by Kogyo Chosakai Co., Ltd. in 1994). There is no particular limitation on the liquid crystal display device to which the present invention can be applied, and the present invention can be applied to various types of liquid crystal display devices described in the above "Next Generation Liquid Crystal Display Technology".

The present invention will be explained in more detail below with reference to examples. The materials, amounts used, ratios, processing contents, processing procedures, etc. shown in the following examples can be changed as appropriate without departing from the spirit of the present invention. Therefore, the scope of the present invention is not limited to the specific examples shown below.

<Synthesis Example>
Synthesis Example 1-1 Synthesis of Compound (P-1)
To 15 parts by mass (1 molar equivalent) of compound (a-1), 1 molar equivalent of compound (b-1) and 30 parts by mass of dimethylformamide (DMF) were added, and the mixture was heated and stirred at an external temperature of 45° C. under a nitrogen stream for 2 hours. The solid thus produced was filtered out while hot, and then washed with 30 parts by mass of water. The solid thus obtained was dried by blowing air at 50° C., and 15.05 parts by mass of compound (S-1) was obtained. Subsequently, 0.5 molar equivalent of compound (c-1) and 40 parts by mass of acetic acid (AcOH) were mixed with 8.5 parts by mass (1 molar equivalent) of compound (S-1), and the mixture was heated and stirred at an external temperature of 115° C. for 2 hours under a nitrogen stream. The solid thus produced was filtered out while hot, and then washed with 30 v/w% methanol. The solid thus obtained was dried by blowing air at 50° C., and 10.0 parts by mass of compound (P-1) was obtained. The (M+H)(posi) value in the mass spectrum of the compound (P-1) was 587.

(Synthesis Examples 1-2 to 1-17) Synthesis of compounds (P-2), (P-4), (P-5), (P-12), (P-13), (P-14), (P-15), (P-18), (P-19), (P-20), (P-21), (P-22), (P-23), (P-24), (P-25), and P-28 Compounds (P-2), (P-4), (P-5), (P-12), (P-13), (P-14), (P-15), (P-18), (P-19), (P-20), (P-21), (P-22), (P-23), (P-24), (P-25), and P-28) were synthesized in the same manner as in Synthesis Example 1-1, except that compound (a-1), compound (b-1), and compound (c-1) in Synthesis Example 1-1 were changed to the compounds shown in the columns for compound (a), compound (b), and compound (c) in the table below, respectively.

(Synthesis Example 2-1) Synthesis of compound (P-3)
To 15 parts by mass (1 molar equivalent) of compound (a-1), 1 molar equivalent of compound (b-1) and 30 parts by mass of dimethylformamide (DMF) were added, and the mixture was heated and stirred at an external temperature of 45° C. under a nitrogen stream for 2 hours. The solid thus produced was filtered out while hot, and then washed with 30 parts by mass of water. The solid thus obtained was dried by blowing air at 50° C., and 15.05 parts by mass of compound (S-1) was obtained. Subsequently, 0.5 molar equivalent of compound (c-3), 1.1 molar equivalent of acetic anhydride (Ac ₂ O), and 20 parts by mass of dimethylformamide (DMF) were mixed with 15.0 parts by mass (1 molar equivalent) of compound (S-1), and the mixture was heated and stirred at an external temperature of 115° C. for 2 hours under a nitrogen stream. The solid thus produced was filtered out while hot, and then washed with 30 v/w% methanol. The solid thus obtained was dried by blowing air at 50° C., and 11.8 parts by mass of compound (P-3) was obtained. The (M+H)(posi) value in the mass spectrum of the compound (P-3) was 533.

(Synthesis Example 3-1) Synthesis of compound (P-6)
To 6 parts by mass (1 molar equivalent) of compound (b-2), 2 molar equivalents of compound (a-2) and 50 parts by mass of chloroform (CHCl ₃ ) were added, and the mixture was heated and stirred at an external temperature of 70° C. under a nitrogen stream for 2 hours. After cooling to room temperature, the resulting solid was filtered off to obtain 2.6 parts by mass of compound (S-2). Subsequently, 0.5 molar equivalents of compound (c-1) and 40 parts by mass of acetic acid (AcOH) were mixed with 2.0 parts by mass (1 molar equivalent) of compound (S-2), and the mixture was heated and stirred at an external temperature of 115° C. for 2 hours under a nitrogen stream. The resulting solid was filtered off while hot, and then washed with 30 v/w% methanol. The resulting solid was blown dry at 50° C. to obtain 2.4 parts by mass of compound (P-6). The (M+H)(posi) value in the mass spectrum of compound (P-6) was 427.

Synthesis Examples 3-2 to 3-6 Synthesis of Compounds (P-7), (P-9), (P-10), (P-11), and (P-33) Compounds (P-7), (P-9), (P-10), (P-11), and (P-33) were synthesized by the same operation as in Synthesis Example 3-1, except that compound (a-2), compound (b-2), and compound (c-1) in Synthesis Example 3-1 were changed to the compounds shown in the columns for compound (a), compound (b), and compound (c) in the table below, respectively.

(Synthesis Example 4-1) Synthesis of compound (P-8)
To 6 parts by mass (1 molar equivalent) of compound (b-2), 2 molar equivalents of compound (a-2) and 50 parts by mass of chloroform (CHCl ₃ ) were added, and the mixture was heated and stirred at an external temperature of 70° C. under a nitrogen stream for 2 hours. After cooling to room temperature, the resulting solid was filtered off to obtain 2.6 parts by mass of compound (S-2). Subsequently, 1.5 parts by mass (1 molar equivalent) of compound (S-2) was mixed with 0.5 molar equivalents of compound (c-3), 1.1 molar equivalents of acetic anhydride (Ac ₂ O), and 20 parts by mass of dimethylformamide (DMF), and the mixture was heated and stirred at an external temperature of 115° C. for 2 hours under a nitrogen stream. The resulting solid was filtered off while hot, and then washed with 30 v/w% methanol. The resulting solid was blown dry at 50° C. to obtain 0.8 parts by mass of compound (P-8). The (M+H)(posi) value in the mass spectrum of the compound (P-8) was 373.

Synthesis Examples 4-2 and 4-3 Synthesis of Compounds (P-26) and (P-27) Compounds (P-26) and (P-27) were synthesized in the same manner as in Synthesis Example 4-1, except that compound (a-2), compound (b-2), and compound (c-3) in Synthesis Example 4-1 were changed to the compounds shown in the columns for compound (a), compound (b), and compound (c) in the table below, respectively.

(Synthesis Example 5-1) Synthesis of compound (P-29)
15.0 parts by mass (1 molar equivalent) of compound (S-18) was mixed with 1.1 molar equivalents of (c-1) and 60 parts by mass of acetic acid (AcOH), and the mixture was heated and stirred under a nitrogen stream at an external temperature of 115° C. for 2 hours. The resulting solid was filtered off while hot and washed with 30 v/w% methanol. The resulting solid was blown dry at 50° C. to obtain 20.0 parts by mass of compound (I-2). Subsequently, 1.0 molar equivalents of compound (S-1) and 20 parts by mass of acetic acid (AcOH) were mixed with 4.0 parts by mass (1 molar equivalent) of compound (I-2), and the mixture was heated and stirred under a nitrogen stream at an external temperature of 115° C. for 2 hours. The resulting solid was filtered off while hot and washed with 30 v/w% methanol. The resulting solid was blown dry at 50° C. to obtain 2.1 parts by mass of compound (P-29). The (M+H)(posi) value in the mass spectrum of the compound (P-29) was 644.

Synthesis Examples 5-2 to 5-6 Synthesis of Compounds (P-16), (P-17), (P-30), (P-31), and (P-32) Compounds (P-16), (P-17), (P-30), (P-31), and (P-32) were synthesized by the same operation as in Synthesis Example 5-1, except that compound (S-1), compound (S-18), and compound (c-1) in Synthesis Example 5-1 were changed to the compounds shown in the columns for compound S(1), compound S(2), and compound (c) in the table below, respectively.

The synthesized compounds (P-1) to (P-33) have the following structures.

The compounds listed in the columns of Compound (a), Compound (b), Compound (c), Compound S (1), and Compound S (2) in the above table are as follows.

<Preparation of Dispersion>
After mixing the materials shown in the table below, 230 parts by mass of zirconia beads with a diameter of 0.3 mm were added, and dispersion treatment was carried out for 5 hours using a paint shaker, and the beads were separated by filtration to produce a dispersion. Note that in the following, for those marked as "Yes" in the column for kneading and polishing treatment, the pigment used was kneaded and polished by the following method.

(Kneading and polishing treatment conditions)
5.3 parts by mass of pigment, 74.7 parts by mass of grinding agent and 14 parts by mass of binder were added to a Labo Plastomill (manufactured by Toyo Seiki Seisakusho Co., Ltd.), and the temperature of the kneaded material in the device was controlled to 70°C, and kneaded for 2 hours. The pigment used was the material listed in the pigment column in the table below. The grinding agent used was neutral anhydrous Glauber's salt E (average particle size (volume-based 50% diameter (D50)) = 20 μm, manufactured by Mitajiri Chemical Industry Co., Ltd.). The binder used was diethylene glycol. After kneading and polishing, the kneaded material was washed with 10 L of water at 24°C to remove the grinding agent and binder, and then treated in a heated oven at 80°C for 24 hours.

Details of the materials indicated by the abbreviations in the table above are as follows:

(Pigments, pigment derivatives)
PG36: C.I. Pigment Green 36 (green pigment, phthalocyanine pigment)
PG58: C.I. Pigment Green 58 (green pigment, phthalocyanine pigment)
PG63: C.I. Pigment Green 63 (green pigment, phthalocyanine pigment)
G1: Compound having the following structure (naphthalocyanine pigment)
PR122: C.I. Pigment Red 122 (red pigment, quinacridone pigment)
PR177: C.I. Pigment Red 177 (red pigment, anthraquinone pigment)
PR224: C.I. Pigment Red 224 (red pigment, perylene pigment)
PR254: C.I. Pigment Red 254 (red pigment, diketopyrrolopyrrole pigment)
PR264: C.I. Pigment Red 264 (red pigment, diketopyrrolopyrrole pigment)
PR272: C.I. Pigment Red 272 (red pigment, diketopyrrolopyrrole pigment)
PY129: C.I. Pigment Yellow 129 (yellow pigment, azomethine pigment)
PY138: C.I. Pigment Yellow 138 (yellow pigment, quinophthalone pigment)
PY139: C.I. Pigment Yellow 139 (yellow pigment, isoindoline pigment)
PY185: C.I. Pigment Yellow 185 (yellow pigment, isoindoline pigment)

P-1 to P-33: Compounds P-1 to P-33 (specific compounds) mentioned above

C-1: Compound having the following structure (comparative compound)

A-1: Compound having the following structure

(Dispersant)
D1: Resin having the following structure (the number attached to the main chain is the molar ratio, and the number attached to the side chain is the number of repeating units. Weight average molecular weight: 24,000)
D3: Resin having the following structure (the number attached to the main chain is the molar ratio, and the number attached to the side chain is the number of repeating units. Weight average molecular weight: 17,000)
D4: Resin having the following structure (the number attached to the main chain is the molar ratio, and the number attached to the side chain is the number of repeating units. Weight average molecular weight: 7000)
D5: Resin having the following structure (the number attached to the main chain is the molar ratio, and the number attached to the side chain is the number of repeating units. Weight average molecular weight: 16,000)
D6: Resin having the following structure (the number attached to the main chain is the molar ratio, and the number attached to the side chain is the number of repeating units. Weight average molecular weight: 10,000)
D7: Acrylic block copolymer (EB-1) described in paragraph 0219 of Japanese Patent No. 6432077
D9: DISPERBYK-142 (manufactured by BYK Chemie)
D10: Resin having the following structure (the numbers attached to the main chain are molar ratios. Weight average molecular weight: 6,000)
D11: Resin having the following structure (the number attached to the main chain is the molar ratio, and the number attached to the side chain is the number of repeating units. Weight average molecular weight: 7500)

(solvent)
S1: Propylene glycol monomethyl ether acetate (PGMEA)
S2: Cyclohexanone S3: Butyl acetate S4: Ethyl lactate (EL)
S5: Propylene glycol monomethyl ether (PGME)
S6: Cyclopentanone

(Polymerization inhibitor)
H1: p-Methoxyphenol

<Production of Colored Composition>
The materials shown in the table below were mixed and stirred, and then filtered using a nylon filter having a pore size of 0.45 μm (manufactured by Nippon Pall Co., Ltd.) to prepare a colored composition.

The ingredients listed in the table above are abbreviated as follows:

(Dispersion)
Dispersions R1 to R68, Y1, G1 to G4, and r1: the above-mentioned dispersions R1 to R68, Y1, G1 to G4, and r1

(binder)
D1: Resin described in the above-mentioned dispersant D1 D2: Resin having the following structure (weight average molecular weight 11,000, the numerical value added to the main chain is the molar ratio)
D3: Resin described in the above-mentioned dispersant D3 D8: Resin having the following structure (weight average molecular weight 11,000, the numerical value added to the main chain is the molar ratio)

(Polymerizable Monomer)
M1: a mixture of compounds having the following structure (a mixture of the compound on the left (a hexafunctional (meth)acrylate compound) and the compound on the right (a pentafunctional (meth)acrylate compound) in a molar ratio of 7:3)
M2: a compound having the following structure
M3: a compound having the following structure
M4: succinic acid modified dipentaerythritol hexaacrylate (acid value 67 mg KOH/g)
M5: a compound having the following structure
M6: a compound having the following structure

(Photopolymerization initiator)
F1 to F6: Compounds having the following structures

(Surfactant)
W1: Compound having the following structure (weight average molecular weight 14,000, the percentages indicating the proportions of repeating units are mol%, fluorosurfactant)
W2: Compound having the following structure (weight average molecular weight 3000, silicone surfactant)

(Polymerization inhibitor)
H1: p-Methoxyphenol

(Ultraviolet absorber)
UV1: Compound having the following structure UV2: Compound having the following structure

(Antioxidants)
I1: A compound having the following structure:

(Epoxy Compound)
G1: EHPE3150 (manufactured by Daicel Corporation)

(solvent)
S1: Propylene glycol monomethyl ether acetate (PGMEA)
S2: Cyclohexanone S3: Butyl acetate S4: Ethyl lactate (EL)
S5: Propylene glycol monomethyl ether (PGME)
S6: Cyclopentanone

<Spectral characteristics: color value>
Each coloring composition was applied onto a glass substrate by spin coating. Then, a hot plate was used to heat the film at 100° C. for 2 minutes to form a film with a thickness of 0.6 μm. The obtained film was irradiated with light of a predetermined wavelength, and its transmittance was measured using a spectrometer (UV4100, manufactured by Hitachi High-Tech Corporation) to measure the optical density (OD value). Here, for Examples 1 to 94 and Comparative Example 1, light with a wavelength of 530 nm was irradiated. For Examples 95 and 96, light with a wavelength of 450 nm was irradiated. For Examples 97 to 100, light with a wavelength of 660 nm was irradiated. The obtained optical density was normalized by the film thickness to obtain a relative value of the color value at wavelengths of 400 to 500 nm, and the color value was evaluated according to the following criteria.
A: The relative value of the color value at wavelengths of 400 to 500 nm is 0.6 or more. B: The relative value of the color value at wavelengths of 400 to 500 nm is 0.4 or more and less than 0.6. C: The relative value of the color value at wavelengths of 400 to 500 nm is less than 0.4.

<Heat resistance>
A base agent (CT-4000, manufactured by FUJIFILM Electronic Materials Co., Ltd.) was applied on a glass substrate by spin coating so that the film thickness was 0.1 μm, and heated at 220 ° C. for 1 hour using a hot plate to form a base layer. Each coloring composition was applied on the glass substrate with the base layer by spin coating, and then heated at 100 ° C. for 2 minutes using a hot plate to obtain a coating film. The obtained coating film was irradiated with light having a wavelength of 365 nm and exposed at an exposure dose of 500 mJ / cm ^2. Note that the exposure step was omitted in Example 96. Next, the film was heated at 220 ° C. for 5 minutes using a hot plate to obtain a film with a film thickness of 0.5 μm. The obtained film was measured for light transmittance (transmittance) in the wavelength range of 400 to 700 nm using MCPD-3000 manufactured by Otsuka Electronics Co., Ltd. Next, the film prepared above was heated at 265 ° C. for 5 minutes. The transmittance of the film after heating was measured, the maximum change in transmittance was calculated, and the heat resistance was evaluated according to the following criteria. The transmittance was measured five times for each sample, and the average of the three results excluding the maximum and minimum values was used. The maximum change in transmittance means the change in the wavelength at which the change in transmittance of the film before and after heating is the largest in the wavelength range of 400 to 700 nm.
Change in transmittance (%) = |Transmittance of film before heating (%) - Transmittance of film after heating (%)|
A: The maximum amount of change in transmittance is less than 5%. B: The maximum amount of change in transmittance is 5% or more and less than 10%. C: The maximum amount of change in transmittance is 10% or more.

<High temperature and humidity resistance>
A base agent (CT-4000, manufactured by FUJIFILM Electronic Materials Co., Ltd.) was applied on a glass substrate by spin coating so that the film thickness was 0.1 μm, and heated at 220 ° C. for 1 hour using a hot plate to form a base layer. Each coloring composition was applied on the glass substrate with the base layer by spin coating so that the film thickness after pre-baking was 0.6 μm. Next, a hot plate was used to pre-bake at 100 ° C. for 2 minutes. Next, an i-line stepper exposure device (FPA-3000i5 +, manufactured by Canon Co., Ltd.) was used to irradiate light having a wavelength of 365 nm at an exposure dose of 500 mJ / cm ² for exposure. Then, a film was produced by post-baking at 200 ° C. for 3 minutes. In addition, the exposure process was omitted in Example 96. The obtained film was subjected to a moisture resistance test in which it was left for 96 hours in an atmosphere of a temperature of 110° C. and a relative humidity of 85% using a thermo-hygrostat (IW222, manufactured by Yamada Scientific Co., Ltd.).
For each of the films before and after the moisture resistance test, the transmittance in the wavelength range of 300 to 800 nm was measured using a spectrophotometer (UV3600, manufactured by Shimadzu Corporation, reference: glass substrate), and the rate of change in transmittance was calculated using the following formula, and the moisture resistance was evaluated according to the following criteria.
Change in transmittance (%) = |[(Transmittance (%) of film before moisture resistance test - Transmittance (%) of film after moisture resistance test) / Transmittance (%) of film before moisture resistance test] × 100|
A: The transmittance fluctuation is less than 2% in the entire wavelength range of 300 to 800 nm. B: The transmittance fluctuation is less than 5% in the entire wavelength range of 300 to 800 nm, and the transmittance fluctuation at at least some wavelengths is 2% or more and less than 5%. C: The transmittance fluctuation at at least some wavelengths in the wavelength range of 300 to 800 nm is 5% or more.

As shown in the above table, the examples were superior to the comparative examples in the evaluation of heat resistance and moisture resistance.
The films formed from the colored compositions of the examples can be suitably used in optical filters, solid-state imaging devices, and image display devices.

Claims (12)

A coloring composition comprising a colorant, a resin, and a solvent,
The colorant is a coloring composition containing a compound represented by formula (1);
In formula (1), L ¹ represents a group represented by formula (L-1):
A ¹ and A ² each independently represent a cyclic structure;
B ¹ and B ² each independently represent O, S, or a group represented by formula (B-1);
In formula (L-1), X ^L1 and X ^L2 each independently represent O or S;
C ¹ represents a fused ring structure or a 6- or more-membered monocyclic ring structure;
In formula (B-1), R ^B1 and R ^B2 each independently represent a hydrogen atom or a substituent.
R ^B1 and R ^B2 may be bonded to form a ring. The coloring composition according to claim 1, further comprising a photopolymerization initiator and a polymerizable compound. The coloring composition according to claim 1 or 2, wherein X ^L1 and X ^L2 in the formula (L-1) are O. The colored composition according to claim 1 or 2, wherein L ¹ is a group represented by any one of formulas (L-1) to (L-5).
The coloring composition according to claim 1 or 2, wherein the compound represented by formula (1) is a yellow colorant. The coloring composition according to claim 1 or 2, wherein the colorant further comprises a green colorant or a red colorant. The coloring composition according to claim 1 or 2, which is for forming a color filter. A film obtained using the coloring composition according to claim 1 or 2. A color filter having the film according to claim 8. A solid-state imaging device having the film according to claim 8. An image display device having the film according to claim 8. A compound represented by formula (1);
In formula (1), L ¹ represents a group represented by formula (L-1):
A ¹ and A ² each independently represent a cyclic structure;
B ¹ and B ² each independently represent O, S, or a group represented by formula (B-1);
In formula (L-1), X ^L1 and X ^L2 each independently represent O or S;
C ¹ represents a fused ring structure or a 6- or more-membered monocyclic ring structure;
In formula (B-1), R ^B1 and R ^B2 each independently represent a hydrogen atom or a substituent.
R ^B1 and R ^B2 may be bonded to form a ring.