[go: up one dir, main page]

WO2023163064A1 - Composition d'encre, ensemble d'encre, objet enregistré obtenu par application de la composition d'encre sur un substrat, procédé d'enregistrement, procédé de fabrication d'objet enregistré, et dispositif d'enregistrement à jet d'encre dans lequel est installé un réceptacle d'admission rempli de composition d'encre - Google Patents

Composition d'encre, ensemble d'encre, objet enregistré obtenu par application de la composition d'encre sur un substrat, procédé d'enregistrement, procédé de fabrication d'objet enregistré, et dispositif d'enregistrement à jet d'encre dans lequel est installé un réceptacle d'admission rempli de composition d'encre Download PDF

Info

Publication number
WO2023163064A1
WO2023163064A1 PCT/JP2023/006539 JP2023006539W WO2023163064A1 WO 2023163064 A1 WO2023163064 A1 WO 2023163064A1 JP 2023006539 W JP2023006539 W JP 2023006539W WO 2023163064 A1 WO2023163064 A1 WO 2023163064A1
Authority
WO
WIPO (PCT)
Prior art keywords
ink composition
water
ink
soluble organic
composition according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2023/006539
Other languages
English (en)
Japanese (ja)
Inventor
保真 齋藤
祐二 牧本
充功 田村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DNP Fine Chemicals Co Ltd
Original Assignee
DNP Fine Chemicals Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by DNP Fine Chemicals Co Ltd filed Critical DNP Fine Chemicals Co Ltd
Priority to JP2024503233A priority Critical patent/JPWO2023163064A1/ja
Publication of WO2023163064A1 publication Critical patent/WO2023163064A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/30—Inkjet printing inks

Definitions

  • the present invention provides an ink composition, an ink set, a recorded matter obtained by applying the ink composition onto a substrate, a recording method, a method for producing a recorded matter, and an ink jet recording method equipped with a container filled with the ink composition. Regarding the device.
  • the inkjet recording method is a recording method in which droplets of an ink composition are directly ejected from very fine nozzles onto a base material such as paper and applied to obtain letters and images.
  • This recording method is easy to reduce size, increase speed, reduce noise, save power, and colorize. , and the range of application has expanded to include commercial printing applications.
  • Aqueous ink compositions in which various coloring materials are dissolved or dispersed in water or a mixture of water and a water-soluble organic solvent are widely used as ink compositions used in inkjet recording systems.
  • Such water-based ink compositions have less impact on the environment than non-aqueous ink compositions containing organic solvents used in the same inkjet recording system, and are non-flammable. Safe for people.
  • the drying temperature can be set high to shorten the drying time rather than extending the drying time. I had to dry it. However, if the drying temperature is high, depending on the base material, warping or the like occurs, so there is also an aspect that the selection range of the base material is narrowed.
  • Patent Document 1 describes a technique related to an inkjet recording method including a step of ejecting an aqueous ink composition containing 2-pyrrolidone and water-insoluble thermoplastic resin particles containing a urethane resin.
  • Japanese Patent Laid-Open No. 2002-100002 describes that the ink jet recording method can obtain an image having high image quality with less bleeding of the ink composition and excellent abrasion resistance.
  • the ink composition contains a resin, it is possible to impart further abrasion resistance to the coating film of the resulting ink composition.
  • An object of the present invention is to provide an ink composition that dries well and improves the scratch resistance of the coating film.
  • the present inventors found that the above problems can be solved by an ink composition containing a water-soluble organic solvent having a predetermined boiling point or less and a resin. was completed. Specifically, the present invention provides the following.
  • An inkjet ink composition containing a water-soluble organic solvent and a resin, at least part of the resin being a dispersible resin, the water-soluble organic solvent having a boiling point of 230°C.
  • the dispersible resin includes acrylic resin, polyurethane resin, polyester resin, vinyl chloride resin, vinyl acetate resin, polyether resin, vinyl chloride vinyl acetate copolymer resin, polyethylene resin, and acrylamide resin.
  • the ink according to any one of (1) to (4), containing one or more resins or copolymer resins selected from the group consisting of resins, epoxy resins, polycarbonate resins, silicone resins, and polystyrene resins. Composition.
  • the water-soluble organic solvent A is an amide solvent having a boiling point of 230° C. or less represented by the following formula (1), a cyclic ester solvent having a boiling point of 230° C. or less represented by the following formula (2), and any one of (1) to (7) containing at least one water-soluble organic solvent A selected from glycol ether solvents having a boiling point of 230° C. or less represented by the following formula (3): ink composition.
  • R 1 is hydrogen or an alkyl group having 1 to 4 carbon atoms
  • R 2 and R 3 are functional groups.
  • R 5 is a carbon chain having an alkylene group having 3 to 5 carbon atoms or a vinylene group
  • R 6 represents hydrogen, an alkyl group having 1 to 2 carbon atoms, or a vinylidene group.
  • R 6 may be present at any position on the carbon chain of R 5 , and may be plural, and R 5 and R 6 may be linked by either a single bond or a multiple bond.
  • R 7 R 9 is hydrogen, an alkyl group, or an acyl group, at least one of which is an alkyl group or an acyl group;
  • R 8 represents an ethylene group or a propylene group;
  • n is 2; Represents an integer of ⁇ 4.
  • the water-soluble organic solvent A is N-ethyl-N-methylformamide, N-methyl-N-propylformamide, N,N-diethylformamide, N-ethyl-N-propylformamide, N,N-dimethyl Acetamide, N-ethyl-N-methylacetamide, N-methyl-N-propylacetamide, N,N-diethylacetamide, N,N-dimethylpropanamide, N-ethyl-N-methylpropanamide, ⁇ -butyrolactone, ⁇ -methylene- ⁇ -butyrolactone, ⁇ -caprolactone, diethylene glycol monoethyl ether, dipropylene glycol monomethyl ether, and diethylene glycol monoisobutyl ether
  • the ink composition according to any one of (1) to (8). .
  • a leveling agent is further included, and the content of the leveling agent is in the range of 0.1 parts by mass or more and 50 parts by mass or less with respect to 100 parts by mass of the water-soluble organic solvent A contained in the ink composition.
  • the ink composition according to any one of (1) to (17).
  • the ink composition according to any one of (1) to (19) or the ink set according to (20) is applied onto a substrate by an inkjet method, and then the ink composition is applied to the ink composition.
  • a method for producing recorded matter comprising applying the ink composition according to any one of (1) to (19) or the ink composition contained in the ink set according to (20) onto a substrate by an inkjet method. .
  • the ink composition of the present invention is highly dry and can form a coating film with high scratch resistance.
  • the ink composition according to the present embodiment is an ink composition for inkjet and contains a water-soluble organic solvent.
  • the water-soluble organic solvent contains one or more water-soluble organic solvents A selected from amide solvents with a boiling point of 230°C or lower, cyclic ester solvents with a boiling point of 230°C or lower, and glycol ether solvents with a boiling point of 230°C or lower. characterized by Such an ink composition containing a predetermined organic solvent having a boiling point of 230° C. or less has high drying properties, and the resulting recorded matter has good scratch resistance.
  • the ink composition according to the present embodiment contains a resin.
  • a water-soluble organic solvent A an amide solvent with a boiling point of 230° C. or lower, a cyclic ester solvent with a boiling point of 230° C. or lower, and a glycol ether solvent with a boiling point of 230° C. or lower
  • it acts as a film-assisting agent.
  • a temperature equal to or higher than a predetermined temperature (minimum film-forming temperature) during film formation of the ink composition, the resin contained in the ink composition can be fused to form a scratch-resistant coating film.
  • a predetermined temperature minimum film-forming temperature
  • the minimum film-forming temperature is generally around the Tg of the resin, but the water-soluble organic solvent A contained in the ink composition makes it possible to lower the minimum film-forming temperature. Even if the drying temperature is as low as the temperature, the resin can be fused on the substrate, and a coating film having sufficient scratch resistance can be formed.
  • the ink composition according to the present embodiment may be a colored ink containing a coloring material.
  • coloring material includes dyes and pigments, such as yellow, magenta, cyan, black, and dyes contained in colored inks that form images such as intermediate colors and light colors thereof, or The concept includes pigments, white dyes or white pigments contained in white ink, and bright pigments contained in metallic ink.
  • the colored inks may be yellow, magenta, cyan, black, and colored inks that form images such as intermediate colors and light colors thereof. Further, the colored ink may be white ink containing a white colorant, metallic ink containing a bright pigment, or the like.
  • the ink composition according to the present embodiment may be a receiving solution containing a cationic compound that is applied to the substrate prior to applying the colored ink to the substrate.
  • it may be a clear ink containing no coloring material, or an overcoat ink for forming an overcoat layer on the surface of a printed matter.
  • the clear ink containing no coloring material may or may not contain a resin.
  • the ink composition according to this embodiment contains a water-soluble organic solvent.
  • the water-soluble organic solvent is 5 parts by mass or more, preferably 20 parts by mass or more, more preferably 50 parts by mass or more, and still more preferably 70 parts by mass in 100 parts by mass of water at 25°C under 1 atmosphere. Parts or more, more preferably 90 parts by mass or more can be dissolved.
  • the water-soluble organic solvent is one or more water-soluble organic solvents A selected from amide solvents with a boiling point of 230°C or lower, cyclic ester solvents with a boiling point of 230°C or lower, and glycol ether solvents with a boiling point of 230°C or lower. contains.
  • the water-soluble organic solvent A will be described below.
  • amide-based solvent with a boiling point of 230°C or lower is an organic is a solvent.
  • amide-based solvents having a boiling point of 230° C. or lower include alkoxyalkylamide-based solvents having an alkoxyalkyl group (C n H 2n+1 —O—C m H 2m —) and alkyl groups having an alkyl group (C n H 2n+1 —).
  • Examples include amide-based solvents and cyclic amide-based solvents having a cyclic structure and a —C( ⁇ O)—N— group in the cyclic structure.
  • the amide-based solvent having a boiling point of 230°C or lower is preferably an alkylamide-based solvent, an alkoxyalkylamide-based solvent, or a cyclic amide-based solvent, and more preferably an alkylamide-based solvent.
  • an alkylamide-based solvent, an alkoxyalkylamide-based solvent, or a cyclic amide-based solvent By containing an alkylamide-based solvent, an alkoxyalkylamide-based solvent, or a cyclic amide-based solvent, the ink composition exhibits the effects of the present invention.
  • alkylamide-based solvent those having, for example, the following structures can be preferably used.
  • R 1 is hydrogen or an alkyl group having 1 to 4 carbon atoms, and R 2 and R 3 are functional groups.
  • R 2 and R 3 are not particularly limited as long as they are functional groups.
  • R 2 and R 3 are preferably hydrogen, an alkyl group, an alkoxy group, a hydroxyalkyl group or a hydroxyl group. more preferably hydrogen or an alkyl group having 1 to 4 carbon atoms.
  • R 2 and R 3 may be the same or different.
  • alkylamide-based solvents in which R 1 to R 3 in formula (1) are hydrogen or alkyl groups include formamide, acetamide, propanamide, butanamide, isobutylamide, pentanamide, and N-methylformamide.
  • R 2 and R 3 in formula (1) are alkoxy groups, hydroxyl groups, and hydroxyalkyl groups
  • R 2 and R 3 in formula (1) are alkoxy groups, hydroxyl groups, and hydroxyalkyl groups
  • examples of those in which R 2 and R 3 in formula (1) are alkoxy groups, hydroxyl groups, and hydroxyalkyl groups include N-ethyl-N-(2-methoxyethyl)formamide and N-methoxymethylformamide. , N-hydroxymethyl-N-methylacetamide, N-(2-hydroxyethyl)-N-methylacetamide, N-methoxymethyl-N-methylformamide, or those having a different carbon number or a branched carbon chain structure etc.
  • N-ethyl-N-methylformamide N-methyl-N-propylformamide, N,N-diethylformamide, N-ethyl-N-propylformamide, N
  • a more selected alkylamide solvent is particularly preferred.
  • alkoxyalkylamide-based solvent for example, among alkylamide-based solvents having an alkylamide-based structure represented by formula (2), those having a boiling point of 230° C. or lower can be preferably used.
  • R 12 is each independently an alkyl group having 1 to 4 carbon atoms
  • R 13 is an alkylene group having 1 to 4 carbon atoms
  • R 10 and R 11 are each independently It is a functional group that may be independent.
  • R 12 is preferably an alkyl group having 1 or more and 2 or less carbon atoms, more preferably an alkyl group having 1 or more and 2 or less carbon atoms.
  • R 13 is preferably an alkylene group having 1 to 3 carbon atoms, more preferably an alkylene group having 1 to 2 carbon atoms.
  • R 10 and R 11 are not particularly limited as long as they are functional groups.
  • R 10 and R 11 are preferably hydrogen, an alkyl group, an alkoxy group, a hydroxyalkyl group, or a hydroxyl group. more preferably hydrogen or an alkyl group having 1 to 4 carbon atoms, more preferably hydrogen or an alkyl group having 1 to 2 carbon atoms
  • alkoxyalkylamide-based solvent 3-methoxy-N,N-dimethylpropanamide, 3-propoxy-N,N-dimethylpropanamide, or the difference in the number of carbon atoms in the alkoxy group or alkyl group or the branched structure of the carbon chain. of those having a boiling point of 230° C. or lower are preferred. Among these, 3-methoxy-N,N-dimethylpropanamide is particularly preferable from the viewpoint of exhibiting the effects of the present invention.
  • the alkylamide solvent those having a boiling point of 230° C. or lower among the cyclic amide solvents represented by the formulas (3) to (5) can be preferably used.
  • R 4 is an optionally branched alkylene group having 3 to 5 carbon atoms
  • R 5 is hydrogen, an alkyl group having 1 to 4 carbon atoms, or an unsaturated hydrocarbon group. represent.
  • R 4 is preferably an alkylene group having 3 or more and 4 or less carbon atoms.
  • R5 is preferably hydrogen, an alkyl group having 1 to 2 carbon atoms, or an unsaturated hydrocarbon group.
  • R 14 is hydrogen, an optionally branched alkyl group having 1 to 4 carbon atoms, or an unsaturated hydrocarbon group, and R 15 represents an alkylene group having 1 to 4 carbon atoms.
  • R 16 and R 17 are each independently hydrogen, an optionally branched alkyl group having 1 to 4 carbon atoms, or an unsaturated hydrocarbon group, and R 18 is 1 to 4 carbon atoms. represents the following optionally branched alkylene group.
  • Cyclic amide solvents include N-vinylmethyloxazolidinone, 1,3-dimethyl-2-pyrrolidone, N-methyl-2-pyrrolidone, N-ethyl-2-pyrrolidone, ⁇ -lactam, 4-methoxy-1-methyl -2-pyrrolidinone, N-propyl-2-pyrrolidone, N-methyl-2-piperidinone, or those having a branched carbon chain structure or a different number of carbon atoms in their alkoxy or alkyl groups, those having a boiling point of 230°C or less is preferred.
  • N-methyl-2-pyrrolidone is particularly preferable from the viewpoint of exhibiting the effects of the present invention.
  • a cyclic ester solvent having a boiling point of 230° C. or less can preferably be used, for example, having the following structure.
  • R 5 is a carbon chain having an alkylene group having 3 to 5 carbon atoms or a vinylene group
  • R 6 represents hydrogen, an alkyl group having 1 to 2 carbon atoms, or a vinylidene group.
  • R 6 may be at any position in the carbon chain of R 5 and may be plural, and R 5 and R 6 may be linked by either a single bond or a multiple bond.
  • R 5 is preferably an alkylene group having 4 or more and 5 or less carbon atoms, more preferably an alkylene group having 5 carbon atoms.
  • R 6 is preferably hydrogen or an alkyl group having 1 carbon atom, more preferably hydrogen.
  • R 8 is hydrogen or an alkyl group having 1 to 4 carbon atoms
  • R 9 represents an alkylene group having 1 to 3 carbon atoms.
  • cyclic ester solvents examples include ⁇ -butyrolactone, ⁇ -methylene- ⁇ -butyrolactone, ⁇ -caprolactone, ⁇ -valerolactone, ⁇ -hexanolactone, ⁇ -heptanolactone, ⁇ -valerolactone, ⁇ -hexanolactone, ⁇ -heptalactone, ⁇ -octalactone, ⁇ -nonalactone, ⁇ -decalactone, ⁇ -undecalactone, ⁇ , ⁇ -dimethyl- ⁇ -butyrolactone, ⁇ -methyl- ⁇ -butyrolactone, ⁇ - Crotolactone, ⁇ -methylene- ⁇ -butyrolactone, ⁇ -methyl- ⁇ -butyrolactone, 6-methylvalerolactone, 2,3-butylene carbonate, ethylene carbonate, propylene carbonate, etc. with a boiling point of 230°C or less can be done.
  • Glycol ether solvent with a boiling point of 230°C or less A glycol ether solvent with a boiling point of 230°C or less means that the boiling point is 230°C or less, and the OH groups at one or both ends of the polyalkylene glycol are alkyl or acyl. , is an aryl-substituted organic solvent. Glycol ether solvents having a boiling point of 230° C. or less can preferably be used, for example, having the following structure.
  • R 7 and R 9 are hydrogen, an alkyl group, or an acyl group, at least one of which is an alkyl group or an acyl group.
  • R 8 represents an ethylene group or a propylene group.
  • n represents an integer from 2 to 4.
  • glycol ether solvents include ethylene glycol monomethyl (or ethyl, propyl, isopropyl, n-butyl, isobutyl, t-butyl, pentyl, n-hexyl, 2-ethylhexyl) ether, diethylene glycol monomethyl (or ethyl, propyl , isopropyl, n-butyl, isobutyl, t-butyl, pentyl, n-hexyl, 2-ethylhexyl) ether, triethylene glycol monomethyl (or ethyl, propyl, isopropyl, n-butyl, isobutyl, t-butyl, pentyl, n -hexyl, 2-ethylhexyl) ether, propylene glycol monomethyl (or ethyl, propyl, isopropyl, n-butyl, isobut
  • the organic solvent A preferably contains an amide-based solvent having a boiling point of 230° C. or less, and particularly preferably contains an alkylamide-based solvent.
  • the water-soluble organic solvent A may contain two or more water-soluble organic solvents A.
  • an ink composition containing at least two or more amide-based solvents having a boiling point of 230°C or lower, and (2) at least an amide-based solvent having a boiling point of 230°C or lower and a cyclic ester-based solvent having a boiling point of 230°C or lower. and an ink composition containing (3) an amide solvent having a boiling point of 230° C. or less and a glycol ether solvent having a boiling point of 230° C. or less, and (4) a cyclic ester having a boiling point of 230° C. or less and an ink composition containing a glycol ether solvent having a boiling point of 230° C. or lower.
  • water-soluble organic solvents A with a high water/1-octanol partition coefficient (LogP) are preferred.
  • the partition coefficient is an index of the hydrophobicity of an organic solvent, and a higher organic solvent with a higher partition coefficient (LogP) in water/1-octanol means that the organic solvent has relatively higher hydrophobicity. is.
  • An ink composition containing a water-soluble organic solvent A having a boiling point of 230° C. or less has high drying properties and high productivity of the resulting recorded matter. If the treatment is shortened or the drying treatment is performed at a low temperature, the film-forming property of the ink composition containing the dispersible resin is lowered, and the abrasion resistance is relatively lowered.
  • An ink composition containing a dispersible resin by containing a water-soluble organic solvent A having a high water/1-octanol partition coefficient (LogP) that is, a water-soluble organic solvent A having relatively high hydrophobicity
  • the ink composition is capable of forming a coating film having high scratch resistance.
  • the water-soluble organic solvent A having a boiling point of 230° C. or less preferably has a water/1-octanol distribution coefficient (LogP) of ⁇ 0.6 or more, and preferably ⁇ 0.4 or more. is more preferable, and ⁇ 0.3 or more is even more preferable.
  • LogP water/1-octanol distribution coefficient
  • the water-soluble organic solvent A having a boiling point of 230° C. or less preferably has a water/1-octanol distribution coefficient (LogP) of 1.5 or less, more preferably 1.0 or less, and 0.5. More preferably: By containing the water-soluble organic solvent A having a water/1-octanol partition coefficient (LogP) of 1.5 or less, the compatibility with the dispersible resin or the like contained in the ink composition is increased, and the ink composition Good storage stability of the product.
  • LogP water/1-octanol distribution coefficient
  • the boiling point of the water-soluble organic solvent A having a boiling point of 230°C or lower is preferably 220°C or lower, more preferably 210°C or lower. As a result, an ink composition having higher drying properties can be obtained.
  • the boiling point of the water-soluble organic solvent A having a boiling point of 230° C. or lower is preferably 130° C. or higher, more preferably 140° C. or higher, and even more preferably 150° C. or higher. When the boiling point of the water-soluble organic solvent A is 130° C. or higher, it is possible to suppress deterioration in ejection stability due to increased drying properties on the nozzle surface.
  • the content of the water-soluble organic solvent A having a boiling point of 230° C. or lower is not particularly limited, but is preferably in the range of 2% by mass or more, and in the range of 5% by mass or more in the total amount of the ink composition. is more preferable, and 10% by mass or more is even more preferable. As a result, an ink composition having a higher film-forming property of the resin particles is obtained.
  • the content of the water-soluble organic solvent A having a boiling point of 230° C. or less is preferably 40% by mass or less, more preferably 35% by mass or less, and preferably 30% by mass or less in the total amount of the ink composition. More preferred. As a result, an ink composition having good compatibility with other components and good ink storage stability can be obtained.
  • the content of the water-soluble organic solvent A can be controlled according to the content of the dispersible resin contained in the ink composition.
  • the content of the water-soluble organic solvent A with respect to 100 parts by mass of the dispersible resin is preferably 30 parts by mass or more, more preferably 50 parts by mass or more, and 65 parts by mass or more. is more preferred.
  • an ink composition having a higher film-forming property of the resin particles is obtained.
  • the ink composition according to the present embodiment may contain other water-soluble organic solvents different from the water-soluble organic solvent A.
  • water-soluble organic solvents examples include 3-methyl-2-oxazolidinone, 3-ethyl-2-oxazolidinone, 3-methyl-2-pyrrolidinone, 2-pyrrolidone, N-methyl-N-(1-methyl ethyl)formamide, N-hydroxypropyl-N-methylacetamide, 3-butoxy-N,N-dimethylpropanamide, ⁇ -lactam, ⁇ -lactam, ⁇ -caprolactam, N-2-hydroxyethyl-2-pyrrolidone, ethylene Amide solvents such as urea, N-hydroxyethyleneurea, 3-methoxypropanamide, 3-butoxypropanamide, N,N-dibutyl-3-methoxypropanamide, N,N-dibutyl-3-butoxypropanamide; alkyl alcohols having 1 to 5 carbon atoms such as methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol
  • Oxyethylene or oxypropylene copolymer ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, 1,3-propanediol, isobutylene glycol, triethylene glycol, tripropylene glycol, tetraethylene glycol, 2-methyl-1,2 -propanediol, 2-methyl-1,2-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 1,2-pentanediol, 1,3-pentanediol, 1,2-hexanediol, 1,5-pentanediol, 1,6-hexanediol, 2-methyl-2,4-pentanediol, 3-methyl-1,3-butanediol, 3-methyl-1,5 - diols such as pentanediol and 2-methyl-2,4-pentaned
  • diol-based solvents are preferred, alkanediol-based solvents are more preferred, and 1,2-alkanediol-based solvents are even more preferred.
  • the diol-based solvent is highly miscible with other components contained in the ink composition, and is less volatile than the water-soluble organic solvent A, which has a boiling point of 230° C. or less. It is possible to prevent this, and it is possible to improve the ejection stability.
  • alkanediol-based solvents it is particularly preferable to contain an alkanediol-based solvent having 3 or more and 6 or less carbon atoms and having at least one hydroxyl group at at least one end of the carbon skeleton.
  • the content of the other water-soluble organic solvent is not particularly limited. is more preferably 10% by mass or more, and even more preferably 15% by mass or more. It is preferably 35% by mass or less, more preferably 30% by mass or less, and even more preferably 25% by mass or less, based on the total amount of the ink composition.
  • the ink composition according to this embodiment may contain water.
  • the water content is not particularly limited, but the lower limit of the water content is preferably in the range of 30% by mass or more, more preferably in the range of 45% by mass or more, based on the total amount of the ink composition. , 50% by mass or more.
  • the upper limit of the water content is preferably within the range of 85% by mass or less, more preferably within the range of 80% by mass or less, and within the range of 75% by mass or less in the total amount of the ink composition. is more preferred.
  • the solvent other than water in the ink composition when water is contained, the solvent other than water in the ink composition must be composed of a highly hydrophilic solvent from the standpoint of storage stability.
  • a water-soluble solvent is selected.
  • the drying property tends to deteriorate particularly in low-temperature drying, and the problem of the present invention that the drying property deteriorates occurs more remarkably. will do.
  • the ink composition according to the present embodiment contains an amide-based solvent having a predetermined boiling point or less, even if it is an aqueous ink composition containing water, it becomes possible to improve the drying property, and it is possible to obtain It is possible to increase the productivity of printed matter.
  • the ink composition according to this embodiment contains a resin. Thereby, the scratch resistance of the coating film can be improved.
  • the ink composition according to the present embodiment is used as an overcoat ink, it is possible to impart suitable scratch resistance to a recorded matter by containing a resin.
  • the ink composition according to the present embodiment contains a water-soluble organic solvent A (an amide solvent with a boiling point of 230° C. or lower, a cyclic ester solvent with a boiling point of 230° C. or lower, and a Since it contains a glycol ether solvent), it is possible to fuse the resin on the substrate even at a low drying temperature such as a temperature below the Tg of the resin, and it has sufficient scratch resistance. It is possible to form a coating film having In particular, when the ink composition according to the present embodiment is used as an overcoat ink, it is possible to impart suitable scratch resistance to a recorded matter by containing a resin.
  • a water-soluble organic solvent A an amide solvent with a boiling point of 230° C. or lower, a cyclic ester solvent with a boiling point of 230° C. or lower, and a Since it contains a glycol ether solvent
  • a dispersible resin is contained from the viewpoint of excellent fixability and excellent water resistance of the ink composition layer.
  • the resin can be dispersed as fine resin particles in the ink composition by electrostatic repulsion or steric repulsion, and dispersion stability can be improved.
  • the dispersible resin is a resin that is dispersed in the ink composition in the form of particles, and means a resin that can be dispersed in the ink composition in the form of particles.
  • One or more resins selected from the group consisting of acrylamide-based resins, epoxy-based resins, polycarbonate-based resins, silicone-based resins, and polystyrene-based resins, or copolymer resins, or mixtures thereof can be used. .
  • These are preferable because they can improve not only water resistance but also solvent resistance.
  • at least one of the constituent monomers is an acrylic resin having an acrylic skeleton or a copolymer with an acrylic resin (acrylic copolymer resin).
  • the Tg (glass transition temperature) of the resin contained in the ink composition according to the present embodiment is not particularly limited, it is preferably higher than the drying temperature of the ink composition. Specifically, the Tg of the resin is preferably 50° C. or higher, more preferably 55° C. or higher, and even more preferably 60° C. or higher. Originally, when the Tg of the resin contained in the ink composition increases, the resin cannot be fused onto the substrate unless the drying temperature is increased, and the abrasion resistance and solvent resistance suitable for recorded matter are improved. , it becomes difficult to impart water friction resistance.
  • the ink composition according to the present embodiment contains the water-soluble organic solvent A acting as a film-forming aid, even if it contains a resin having a high Tg, the resin can be fused on the substrate by low-temperature drying. It is possible to impart suitable abrasion resistance, solvent resistance, and water abrasion resistance to the recorded matter.
  • dispersible resins include, for example, ACRYT WEM-031U, WEM-200U, WEM-321, WEM-3000, WEM-202U, WEM-3008 (manufactured by Taisei Fine Chemical Co., Ltd., acrylic-urethane dispersible resin). , AKW107, RKW-500 (manufactured by Taisei Fine Chemical Co., Ltd., acrylic dispersible resin), LUBRIJET N240 (manufactured by Lubrizol, acrylic dispersible resin), Superflex 150, 210, 470, 500M, E2000, E4800, R5002 (No.
  • the content of the resin (dispersible resin) contained in the ink composition is not particularly limited, but the lower limit of the content of the resin is preferably 0.05% by mass or more based on the total amount of the ink composition. , preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and more preferably 1% by mass or more. Thereby, the scratch resistance of the coating film can be further improved.
  • the upper limit of the resin content is preferably 25% by mass or less, more preferably 20% by mass or less, and even more preferably 15% by mass or less, based on the total amount of the ink composition. This makes it possible to improve ejection stability.
  • the average particle size of the dispersible resin is preferably 30 nm or more, more preferably 40 nm or more, and even more preferably 50 nm or more.
  • the average particle size of the dispersible resin is preferably 300 nm or less, more preferably 270 nm or less, and even more preferably 250 nm or less. This makes it easier for the particles of the dispersible resin to fuse with each other, so that the film formability is improved. In addition, it becomes possible to further improve the ejection stability of the inkjet.
  • the resin when the resin is a particulate dispersible resin, the resin particles contained in the ink composition are more densely filled with each other as the water-soluble organic solvent gradually volatilizes during film formation of the ink composition.
  • the average particle size of the dispersible resin is 300 nm or less, the contact area between the densely packed resin particles increases, and the fusion tends to proceed. As a result, the resin particles can be fused together more effectively on the base material, and a coating film with higher scratch resistance can be formed.
  • the ink composition according to the present embodiment contains a water-soluble organic solvent A (an amide solvent with a boiling point of 230° C. or lower, a cyclic ester solvent with a boiling point of 230° C.
  • the average particle size of the dispersible resin can be measured using a concentrated particle size analyzer (manufactured by Otsuka Electronics Co., Ltd., model: FPAR-1000) at a measurement temperature of 25°C.
  • the weight average molecular weight of the dispersible resin is preferably 10,000 or more, more preferably 50,000 or more, and even more preferably 100,000 or more, from the viewpoint of the water resistance of the ink composition layer.
  • the mass average molecular weight of the dispersible resin is preferably 2,000,000 or less, more preferably 1,500,000 or less, and more preferably 1,000,000 or less.
  • the molecular weight of the resin indicates the mass average molecular weight Mw, which is a value measured by GPC (gel permeation chromatography), using "HLC-8120GPC" manufactured by Tosoh Corporation. , can be measured using a polystyrene standard for a calibration curve as a standard.
  • the ink composition according to this embodiment may contain a leveling agent. Although it is not essential that the ink composition according to the present embodiment contains a leveling agent, the inclusion of the leveling agent allows the ink composition applied on the substrate to spread more wetly. The surface area of the interface between the ink composition and the ambient air is increased. As a result, the ink composition according to the present embodiment containing the water-soluble organic solvent A can be dried more effectively, and the effects of the present invention can be exhibited particularly effectively.
  • a leveling agent makes it easier to wet the base material, making density unevenness less likely to occur.
  • the type of leveling agent is not particularly limited.
  • surfactants such as anionic surfactants, nonionic surfactants, silicone (silicon) surfactants, fluorine surfactants, and acetylene glycol surfactants.
  • surfactants such as silicone (silicon)-based surfactants, acetylene glycol-based surfactants, and alkane glycol-based surfactants are preferred.
  • silicone (silicon)-based surfactants acetylene glycol-based surfactants, and alkane glycol-based surfactants are preferred.
  • the liquid repellency with respect to the nozzle plate can be improved.
  • silicone (silicon)-based surfactant the surface of the coating film has good lubricity and the abrasion resistance of the coating film is improved.
  • Emal Latemul
  • Pelex Neoperex
  • Demol all of which are anionic surfactants; manufactured by Kao Corporation
  • Sunol Liporan, Lipon, and Ripal (all of which are anionic surfactants; Lion Co., Ltd.
  • a leveling agent with an HLB value of 15 or less is preferable. If the leveling agent has an HLB value of 15 or less, the leveling agent tends to be oriented at the interface between the ink composition applied on the substrate and the outside air, and the ink composition spreads more easily. The composition dries more effectively.
  • the content of the leveling agent is 10% of the water-soluble organic solvent A having a boiling point of 230° C. or less contained in the ink composition according to the present embodiment. It is preferable to control according to the content.
  • the water-soluble organic solvent A having a boiling point of 230° C. or less is a relatively hydrophobic water-soluble organic solvent among water-soluble organic solvents. ° C. or lower, the leveling agent becomes more likely to dissolve in the water-soluble organic solvent A, and the orientation of the leveling agent at the interface with the outside air may become difficult. Therefore, by appropriately controlling the content according to the content of the water-soluble organic solvent A having a boiling point of 230° C. or less, the ink composition can spread wetly, so that the ink composition can be effectively dried. Become.
  • the content of the leveling agent is preferably in the range of 0.1 parts by mass or more with respect to 100 parts by mass of the water-soluble organic solvent A contained in the ink composition. As a result, the ink composition is further wetted and spread, so that the ink composition dries more effectively.
  • the content of the leveling agent is more preferably in the range of 0.3 parts by mass or more, and in the range of 0.6 parts by mass or more with respect to 100 parts by mass of the water-soluble organic solvent A contained in the ink composition. It is more preferable that the content is in the range of 1.0 parts by mass or more.
  • the content of the leveling agent is preferably in the range of 50 parts by mass or less with respect to 100 parts by mass of the water-soluble organic solvent A contained in the ink composition. This improves the compatibility of the leveling agent with the amide solvent.
  • the content of the leveling agent is more preferably in the range of 49 parts by mass or less, more preferably in the range of 48 parts by mass or less with respect to 100 parts by mass of the water-soluble organic solvent A contained in the ink composition. preferable.
  • the ink composition according to this embodiment may contain a coloring material.
  • the ink composition according to the present embodiment does not necessarily contain a coloring material. It is possible to use white ink or metallic ink that will serve as a base layer.
  • the coloring material may be either a dye or a pigment.
  • the pigment that can be used in the ink composition according to the present embodiment is not particularly limited, and examples thereof include organic pigments and inorganic pigments used in conventional ink compositions. These may be used individually by 1 type, or may be used in combination of 2 or more type. Note that the ink composition according to the present embodiment may not contain a coloring material.
  • the dispersion stability of the pigment can be improved by using a dispersant or dispersing aid (pigment derivative), which will be described later.
  • organic pigments include, for example, insoluble azo pigments, soluble azo pigments, derivatives from dyes, phthalocyanine-based organic pigments, quinacridone-based organic pigments, perylene-based organic pigments, perinone-based organic pigments, azomethine-based organic pigments, and anthraquinone-based pigments.
  • Organic pigments (anthrone-based organic pigments), xanthene-based organic pigments, diketopyrrolopyrrole-based organic pigments, dioxazine-based organic pigments, nickel azo-based pigments, isoindolinone-based organic pigments, pyranthrone-based organic pigments, thioindigo-based organic pigments, condensed azo organic solid solution pigments such as organic pigments, benzimidazolone organic pigments, quinophthalone organic pigments, isoindoline organic pigments, quinacridone solid solution pigments, perylene solid solution pigments, and other pigments such as lake pigments and carbon black. be done.
  • C.I. color index
  • azo dyes benzoquinone dyes, naphthoquinone dyes, anthraquinone dyes, cyanine dyes, squarylium dyes, croconium dyes, Merocyanine dyes, stilbene dyes, diarylmethane dyes, triarylmethane dyes, fluorane dyes, spiropyran dye
  • inorganic pigments that can be used in the ink composition according to the present embodiment include titanium oxide, barium sulfate, calcium carbonate, zinc oxide, barium carbonate, silica, talc, clay, synthetic mica, alumina, and zinc.
  • flower, lead sulfate, yellow lead, zinc yellow, red iron oxide (iron (III)), cadmium red, ultramarine blue, dark blue, chromium oxide green, cobalt green, amber, titanium black, aluminum, titanium, indium, synthetic iron black, Inorganic solid solution pigments and the like can be mentioned.
  • the average dispersed particle size of these organic pigments or inorganic pigments is not particularly limited as long as the desired color development is possible. Although it varies depending on the type of pigment, the lower limit of the average dispersed particle diameter of the pigment is preferably in the range of 10 nm or more, preferably 20 nm or more, from the viewpoint of obtaining sufficient coloring power with good dispersion stability of the pigment. It is more preferably within the range, and even more preferably within the range of 30 nm or more.
  • the upper limit of the average dispersed particle size of the pigment is preferably 500 nm or less, more preferably 400 nm or less, and even more preferably 350 nm or less.
  • the average dispersed particle size is 500 nm or less, nozzle clogging of an inkjet head is unlikely to occur, and a uniform image with high reproducibility can be obtained.
  • the average dispersed particle diameter is 10 nm or more, the light resistance of the resulting printed matter can be improved.
  • the average dispersed particle diameter of the pigment is the average particle diameter ( D50).
  • the ink composition according to the present embodiment may contain a luster pigment as a pigment.
  • Luminous pigments include metal-containing luster pigments that are at least one of simple metals such as aluminum, silver, gold, nickel, chromium, tin, zinc, indium, titanium, and copper; metal compounds; alloys and mixtures thereof; Pearl pigments having pearl luster or interference luster such as mica, fish scale foil, bismuth oxychloride, silicon dioxide, metal oxides, metal compounds, and laminates thereof may be mentioned.
  • the glitter pigment preferably has a plate-like shape (also referred to as a fine plate-like shape, a scale-like shape, or the like). This makes it possible to impart a more suitable metallic luster to the subject.
  • the content of the coloring material is preferably 0.05% by mass or more, more preferably 0.08% by mass or more, based on the total amount of the ink composition. is more preferable, and 0.1% by mass or more is even more preferable.
  • the content of the coloring material is preferably 20.0% by mass or less, and 17.0% by mass or less, based on the total amount of the ink composition. is more preferable, and 15.0% by mass or less is even more preferable.
  • the ink composition according to this embodiment may contain a pigment dispersant.
  • the ink composition according to the present embodiment does not necessarily contain a pigment dispersant, but by containing the pigment dispersant together with the pigment, the dispersibility of the pigment can be improved.
  • pigment dispersant means a resin or surfactant that adheres to a part of the pigment surface and has a function of improving the dispersibility of the pigment in the ink composition.
  • the pigment dispersant that can be used in the ink composition according to the present embodiment is not particularly limited.
  • cationic, anionic, nonionic, amphoteric, silicone (silicon), and fluorine surfactants can be used.
  • surfactants polymer surfactants (polymer dispersants) such as those exemplified below are preferred.
  • a water-soluble polymer dispersant can be preferably used as a pigment dispersant that can be used in the ink composition according to the present embodiment.
  • water-soluble polymer dispersants include polyester-, polyacrylic-, polyurethane-, polyamine-, and polycaptolactone-based main chains, and side chains containing amino groups, carboxyl groups, sulfone groups, and hydroxyl groups.
  • (co)polymers of unsaturated carboxylic acid esters such as polyacrylic acid esters; copolymers of aromatic vinyl compounds such as styrene and ⁇ -methylstyrene and unsaturated carboxylic acid esters such as acrylic acid esters; (partial) amine salts, (partial) ammonium salts and (partial) alkylamine salts of (co)polymers of unsaturated carboxylic acids such as polyacrylic acid; hydroxyl group-containing unsaturated carboxylic acid esters such as hydroxyl group-containing polyacrylic acid esters Polyurethanes; Unsaturated polyamides; Polysiloxanes; Long-chain polyaminoamide phosphates; Polyethyleneimine derivatives (poly (lower alkylene imine) and free carboxyl group-containing polyester amides obtained by reaction and their bases); polyallylamine derivatives (polyallylamine and polyester having a free carboxyl group
  • water-soluble polymer dispersant examples include Cray Valley's SMA1440, SMA2625, SMA17352, SMA3840, SMA1000, SMA2000, SMA3000, BASF Japan's JONCRYL67, JONCRYL678, JONCRYL586, JONCRYL611, JONCRYL680, JONCRYL682, JONCRYL690, JONCRYL819, JONCRYL -JDX5050, EFKA4550, EFKA4560, EFKA4585, EFKA5220, EFKA6230, Dispex Ultra PX4575, Lubrizol SOLSPERSE20000, SOLSPERSE27000, SOLSPERSE40000, SOLSPERSE410 00, SOLSPERSE41090, SOLSPERSE43000, SOLSPERSE44000, SOLSPERSE45000, SOLSPERSE46000, SOLSPERSE47000, SOLSPERSE53095, SOLSPERSE54000,
  • the ink composition according to this embodiment may contain a cationic compound.
  • the ink composition according to the present embodiment does not necessarily contain a cationic compound. can do.
  • the coloring ink containing the coloring material is anionic.
  • cationic compounds include polyvalent metal salts (polyvalent metal ions) and cationic resins.
  • Polyvalent metal salts mainly contain ions and anions of polyvalent metals.
  • the concept of "containing a polyvalent metal salt” includes not only those to which a polyvalent metal salt is added during preparation of the receiving solution, but also compounds capable of generating polyvalent metal ions and compounds capable of generating anions. and are added at the time of preparation of the receiving solution to contain the polyvalent metal ions and the anions constituting the polyvalent metal salt.
  • the anion may be an anion of an inorganic substance or an anion of an organic substance.
  • the anions preferably include organic anions.
  • inorganic anions include chloride ions, bromide ions, nitrate ions, and sulfate ions.
  • organic anions include acetic acid, benzoic acid, salicylic acid, 2,4-dihydroxybenzoic acid, 2,5-dihydroxybenzoic acid, dimethylolpropionic acid, pantothenic acid, succinic acid, maleic acid, glutaric acid, Mention may be made of the anions of suberic acid, trimellitic acid, methylmalonic acid.
  • a polyvalent metal ion is an ion of a metal with a valence of at least two. Bleeding of the ink composition can be suppressed by using polyvalent metal ions.
  • polyvalent metal ions include calcium ions, magnesium ions, aluminum ions, titanium ions, iron (II) ions, iron (III) ions, cobalt ions, nickel ions, copper ions, zinc ions, barium ions, strontium ions, and the like. is mentioned.
  • one selected from calcium ions, magnesium ions, nickel ions, zinc ions, and aluminum ions because it has a large interaction with the colorant in the ink composition and has a high effect of suppressing bleeding and unevenness. It is preferable to contain the above.
  • the cationic compound may contain a cationic resin having a cationic group instead of the polyvalent metal salt.
  • cationic resins include resins having cationic groups such as amino groups, ammonium groups, amide groups, and --NHCONH2 groups.
  • a cationic resin can be synthesized by a known method, or a commercially available product can be used.
  • the cationic resin can be synthesized by a known method, or a commercially available product can be used.
  • Examples of commercially available products are as follows: APC-810, 815; D-6010, 6020, 6030, 6040, 6050, 6060, 6080, 6310; FQP-1264 ; RSL-18-22, 4071H, 4400, 8391, 8391H, HD70C, HF70D; WS-72 (manufactured by SNF), Arafix 100, 251S, 255, 255LOX (manufactured by Arakawa Chemical), DK-6810, 6853, 6885 WS-4010, 4011, 4020, 4024, 4027, 4030 (manufactured by Seiko PMC), Senka F-300; Papiogen P-105, P-113, P-271, P-316; Pitchnol QG5A; Myriogen P- 20; Unisense FPA100L, FPA101L, FPA
  • the cationic resin may be a water-soluble cationic resin that dissolves in water or a water-soluble organic solvent, or a dispersible cationic resin that disperses in water or a water-soluble organic solvent.
  • the cationic resin is preferably a dispersible cationic resin.
  • the coating film resistance (scratch resistance) of the ink composition layer can be improved.
  • the cationic compound contains a polyvalent metal ion and a dispersible cationic resin, or the cationic compound contains a water-soluble cationic resin and a dispersible cationic resin. more preferably.
  • the ink composition layer can be coated while suppressing bleeding of the colored ink more effectively.
  • Film resistance shock resistance
  • the content of the cationic compound is not particularly limited. It is preferably in the range of 5% by mass or more, more preferably in the range of 0.8% by mass or more, and even more preferably in the range of 1.0% by mass or more. When the content of the cationic compound is within the range of 0.5% by mass or more based on the total amount of the ink composition, it becomes possible to fix the coloring material more effectively, and the bleeding of the colored ink is effectively suppressed. can do.
  • the upper limit of the content of the cationic compound is preferably within the range of 9% by mass or less, more preferably within the range of 8% by mass or less, and within the range of 7% by mass or less in the total amount of the ink composition. is more preferable. When the content of the cationic compound is within the range of 9% by mass or less based on the total amount of the ink composition, the storage stability of the ink composition is improved.
  • the ink composition may further contain conventionally known additives, if necessary.
  • additives include waxes, viscosity modifiers, pH modifiers, antioxidants, preservatives, antifungal agents, and the like.
  • the method for preparing the ink composition is not particularly limited. , A method in which a pigment and a dispersant are added and dispersed, and then a resin, a surfactant and, if necessary, other ingredients are added. After adding the components of (1), the pigment is dispersed and prepared.
  • the surface tension of the ink composition is not particularly limited, but the upper limit of the static surface tension at 25° C. is preferably 40.0 mN/m or less, more preferably 35.0 mN/m or less, and 32.0 mN/m or less. More preferred.
  • the lower limit of the static surface tension at 25°C is preferably 19.0 mN/m or more, more preferably 20.0 mN/m or more, and even more preferably 21.0 mN/m or more.
  • the static surface tension can be measured, for example, by the Wilhelmy method (DY-300 manufactured by Kyowa Interface Science) at a measurement temperature of 25°C.
  • the conductivity of the ink composition is not particularly limited, it is preferably 2500 ⁇ S/cm or less. By controlling the components of the ink composition so that the electrical conductivity is 2500 ⁇ S/cm or less, it is possible to suppress the interaction between the components and improve the storage stability.
  • the conductivity of the ink composition is preferably 2450 ⁇ S/cm or less, more preferably 2400 ⁇ S/cm or less.
  • the electrical conductivity can be measured at 25° C. with EC Testr 11+ manufactured by Eutech Instruments, for example.
  • the above ink composition may be a colored ink, a metallic ink or the like, a receiving solution containing a cationic compound, or a clear ink containing no coloring material, and may be an overcoat ink.
  • the ink set according to the present embodiment may be an ink set in which these ink compositions are combined.
  • one ink composition contained in the ink set is a colored ink composition (C) containing a coloring material
  • the other ink composition contained in the ink set contains a cationic compound.
  • the ink set that is the receiving solution (P) and one ink composition contained in the ink set are the overcoat inks (O) that form an overcoat layer on the surface of the object, and the other ink compositions contained in the ink set.
  • the ink composition is an ink set that is a receiving solution (P) containing a cationic compound, and one ink composition included in the ink set is a colored ink composition (C) that contains a coloring material, and the ink Other ink compositions included in the set include an ink set that is an overcoat ink (O) that forms an overcoat layer on the surface of a substrate.
  • P receiving solution
  • C colored ink composition
  • O overcoat ink
  • the ink set may be a combination of colored ink compositions (C) containing a coloring material. ink, red ink) or light colored ink compositions (for example, light magenta ink, light cyan ink, light black ink).
  • an ink set containing a white ink composition containing a white colorant, a yellow ink composition, a magenta ink composition, a cyan ink composition, and a black ink composition and a white ink composition containing a white colorant and a yellow ink composition, a magenta ink composition, a cyan ink composition, a black ink composition, and an intermediate color ink composition or a light color ink composition of yellow, magenta, cyan, and black.
  • an ink set containing a metallic ink containing a glitter pigment, a yellow ink composition, a magenta ink composition, a cyan ink composition, and a black ink composition containing a metallic ink containing a glitter pigment and a yellow ink composition
  • a metallic ink containing a glitter pigment and a yellow ink composition A magenta ink composition, a cyan ink composition, a black ink composition, and intermediate color ink compositions or light color ink compositions of yellow, magenta, cyan, and black.
  • the conductivity is preferably 1000 ⁇ S/cm or less. Since the coloring ink composition (C) containing the coloring material contains the coloring material (pigment) in the coloring ink composition (C), the coloring material (pigment) agglomerates and the stability is lowered. tend to
  • the colored ink composition (C) contains components such as a colorant dispersant (pigment dispersant) and a leveling agent (surfactant) that disperse the colorant (pigment) so that the conductivity is 1000 ⁇ S/cm or less. By doing so, it is possible to suppress the interaction between the components (especially between the coloring materials), and it is possible to further improve the stability.
  • the electrical conductivity of the colored ink composition (C) is more preferably 950 ⁇ S/cm or less, even more preferably 900 ⁇ S/cm or less.
  • the electrical conductivity of the overcoat ink (O) is preferably 1000 ⁇ S/cm or less.
  • the overcoat ink (O) that forms the overcoat layer on the surface of the object contains a resin for forming the overcoat layer. tend to decline.
  • the electrical conductivity of the overcoat ink (O) is 1000 ⁇ S/cm or less. interaction can be suppressed, and the stability can be further improved.
  • the conductivity of the overcoat ink (O) is more preferably 950 ⁇ S/cm or less, even more preferably 900 ⁇ S/cm or less.
  • the electrical conductivity of the receiving solution (P) is preferably 1000 ⁇ S/cm or more and 2500 ⁇ S/cm or less. Since the receiving solution (P) contains a cationic compound, the receiving solution (P ) while maintaining the storage stability of the receiving solution (P), it is possible to improve the reactivity with the colored ink (C) and the overcoat ink (O) that land on the receiving solution (P), suppressing bleeding and unevenness. It becomes possible to
  • the electrical conductivity of the receiving solution (P) is more preferably 1050 ⁇ S/cm or higher, more preferably 1100 ⁇ S/cm or higher.
  • the recording method according to the present embodiment is a recording method in which the ink composition described above is applied onto a substrate by an inkjet method.
  • This ink composition contains a water-soluble organic solvent A having a boiling point of 230° C. or less and a resin, and is highly drying and capable of forming a coating film with high scratch resistance.
  • High-speed recording can be achieved by coating the base material with the ink-jet method according to the recording method of the present embodiment. Furthermore, even if recording is performed at a high speed, it is possible to suppress deterioration in abrasion resistance, and as a result, a coating film having high abrasion resistance can be formed.
  • the maximum recording speed in the recording method according to the present embodiment is 7.5 m 2 /h or more in the case of the serial method, although it depends on the type of the base material, the type of the ink jet recording apparatus, and the like. It is preferably 10 m 2 /h or more, more preferably 15 m 2 /h or more. In the case of the single pass method, the speed is preferably 30 m/min or more, more preferably 40 m/min or more, and even more preferably 50 m/min or more.
  • the serial method is a printing method in which the inkjet head is moved in the horizontal direction and the ink is ejected in several batches, while the single-pass method is a method in which the inkjet head is fixed and the substrate passes through the inkjet head once. It is a printing method in which an image is formed by
  • the drying temperature can be recorded at a relatively low temperature. Therefore, it becomes possible to suppress deterioration of scratch resistance due to the organic solvent remaining in the coating film, and as a result, it is possible to form a coating film having high scratch resistance.
  • the drying temperature in the recording method according to the present embodiment may be 80°C or lower, preferably 70°C or lower, and more preferably 60°C or lower.
  • the above-described recording method can also be defined as a method for producing a recorded matter in which the above-described ink composition is applied onto a substrate by an inkjet method.
  • the base material (recording medium) that can be used in the recording method according to the present embodiment is not particularly limited.
  • Various substrates can be used, such as an absorbent substrate such as a woven fabric, or a surface-coated substrate such as a substrate having a receiving layer. The same applies to the base material that can be used in the method of manufacturing a recorded matter according to an embodiment described later.
  • non-absorbent substrates include resin substrates such as polyester resins, polypropylene synthetic paper, polypropylene resins, polyethylene resins, acrylic resins, styrene resins, polycarbonate resins, ABS resins, vinyl chloride resins, polyimide resins, Metal, metal foil coated paper, glass, synthetic rubber, natural rubber and the like can be mentioned.
  • resin substrates such as polyester resins, polypropylene synthetic paper, polypropylene resins, polyethylene resins, acrylic resins, styrene resins, polycarbonate resins, ABS resins, vinyl chloride resins, polyimide resins, Metal, metal foil coated paper, glass, synthetic rubber, natural rubber and the like can be mentioned.
  • absorbent substrates include dry paper, medium-quality paper, high-quality paper, synthetic paper, cotton, synthetic fiber fabric, silk, hemp, fabric, non-woven fabric, leather, and the like.
  • Examples of surface-coated substrates include coated paper, art paper, cast paper, lightweight coated paper, and lightly coated paper.
  • the layer of the ink composition is a layer formed by volatilization of the solvent contained in the ink composition described above.
  • the ink composition contains a coloring material, it becomes a decorative layer forming a desired image or a base layer therefor.
  • the above-described ink composition when used as a receiving solution containing a cationic compound, the above-described ink composition (receiving solution) is applied onto a substrate, and the above-described ink composition (coloring ink) is applied thereon. ) may be applied, or the above-described ink composition (receiving solution) is applied on the substrate, and an ink composition (colored ink) different from the above-described ink composition (colored ink) is applied thereon. You may
  • the ink composition described above when used as an overcoat ink, it becomes an overcoat layer formed on the surface of a recorded matter.
  • the ink composition that forms the recording layer of the recorded matter may be the ink composition described above, or may be an ink composition different from the ink composition described above.
  • An inkjet recording apparatus is an inkjet recording apparatus equipped with a container filled with the ink composition described above.
  • the ink composition described above has high drying property and can form a coating film with high abrasion resistance. Therefore, it is possible to produce recorded matter having high scratch resistance.
  • the storage container mounted on the inkjet recording apparatus is not particularly limited, and examples include containers such as ink bottles, pouches, bag-in-boxes, and drums. Also, these containers may be further housed in a cartridge or the like.
  • the material of the storage container is not particularly limited, and may be a conventionally known resin, or a material containing a part of metal material (for example, an aluminum pouch having an aluminum deposition layer). .
  • this apparatus include a drying mechanism for drying the ink composition after the ink composition is ejected. This makes it possible to effectively remove the volatile components contained in each ink composition and promote film formation of the resin particles.
  • the drying mechanism for drying the ink after ejection is not particularly limited, and may be a heater or the like, or a mechanism for blowing hot air or room temperature air.
  • the ink composition applied on the substrate at a temperature lower than the Tg of the resin contained in the ink composition. Since the above ink composition is highly drying, it can be sufficiently dried even at a temperature lower than the Tg of the resin contained in the ink composition.
  • the ejection method in each ejection part may be any method such as a piezo method, a thermal method, or an electrostatic method.
  • Drying properties of the ink compositions of Examples and Comparative Examples were evaluated. Specifically, after applying 7 g/m 2 of the ink composition onto a vinyl chloride resin substrate with a bar coater, it was placed in an oven at 60° C. and the time until drying was evaluated by touch. The surface was touched with a finger every 30 seconds, and the time until the ink composition stopped adhering was measured, and evaluation was performed based on the following evaluation criteria. The evaluation results are shown in the table below (indicated as "drying property" in the table). Evaluation Criteria A: Dried in 3 minutes. B: Dried in 3.5 to 5 minutes. C: Dried in 5.5 to 7 minutes. D: Dried in 7.5 to 8 minutes. E: Not dried in 8 minutes (out of practical range).
  • Storage stability was evaluated for the ink compositions of Examples and Comparative Examples. Specifically, the ink composition was heated in an oven at 60° C. for one week, and the viscosity before and after heating was measured at a liquid temperature of 25° C., and evaluated based on the following evaluation criteria. The evaluation results are shown in the table below (indicated as "storage stability" in the table). Evaluation Criteria A: Viscosity change rate of 5% or less B: Viscosity change rate of more than 5% and less than 10% C: Viscosity change rate of 10% or more and less than 20% D: Viscosity change rate of 20% or more (outside practical range)
  • Density unevenness Density unevenness was evaluated for recorded matter obtained with the ink compositions of Examples and Comparative Examples. Specifically, the ink composition is filled in an ink cartridge (container), and the ink cartridge (container) is mounted on a serial head type inkjet recording apparatus. A solid image with a droplet size of 6 pl and a printing density of 100% was printed on a vinyl chloride resin substrate, and the presence or absence of density unevenness was visually observed, and evaluation was made based on the following evaluation criteria. The evaluation results are shown in the table below (denoted as "density unevenness" in the table). Evaluation Criteria A: No density unevenness B: Density unevenness C: Image formation not possible due to poor ink wetting (outside practical range)
  • Liquid repellency Liquid repellency was evaluated for the ink compositions of Examples and Comparative Examples. Specifically, the nozzle plate of a 600 dpi printer head in an inkjet recording apparatus is immersed in the ink composition, and the exposed area of the ink composition on the plate after being removed from the liquid surface is visually observed every 30 seconds. was evaluated based on the evaluation criteria of The evaluation results are shown in the table below (indicated as "liquid repellency" in the table). Evaluation criteria A: The exposed area of the plate after 30 seconds is 80% or more B: The exposed area of the plate after 1 minute is 80% or more C: The exposed area of the plate is less than 80% even after 1 minute (outside the practical range)
  • the intermittent discharge properties of the ink compositions of Examples and Comparative Examples were evaluated. Specifically, the ink composition is filled in an ink cartridge (container), the ink cartridge (container) is mounted in a serial head type inkjet recording apparatus, and a nozzle check pattern is printed by the inkjet recording apparatus. Then, after standing still for a certain period of time, the same printing was performed. The presence or absence of missing nozzles was checked before and after standing, and the same printing was repeated until the missing nozzles decreased to less than 10% of the pattern before standing. The evaluation results are shown in the table below (indicated as "intermittent discharge property" in the table).
  • an ink composition containing a water-soluble organic solvent having a predetermined boiling point or lower and a resin can be dried quickly and can improve the scratch resistance of the coating film.
  • the ink compositions of Examples 1, 2, and 4 to 9 containing a leveling agent are good in the "drying property" evaluation of the obtained recorded matter as compared with the ink composition of Example 3 which does not contain a leveling agent. Met.
  • Tg glass transition temperature
  • Example 1 and 18 to 28 in which the type of the water-soluble organic solvent A was changed the water-soluble organic solvent A having a water/1-octanol partition coefficient (LogP) of -0.6 or more was used.
  • the ink compositions of Examples 1, 18 to 22, and 24 to 28 had good scratch resistance even when compared with the ink compositions of Examples 1 and 23.
  • Example 29 receiving solution (P)
  • Example 30 receiving solution (P)
  • Example 34 in which the content of the water-soluble organic solvent A was changed, Examples 1, 35 to 39 in which the content of the water-soluble organic solvent A was in the range of 5% by mass or more
  • the ink composition of Example 34 had even better evaluations of "drying property" and "scratch resistance” than the ink composition of Example 34.
  • the ink compositions of Examples 1 and 34 to 38, in which the content of the water-soluble organic solvent A was in the range of 35% by mass or less were evaluated for "storage stability" even when compared with the ink composition of Example 39. was even better.
  • the ink compositions of Examples 1 and 40 to 44 in which the resin content was changed the ink compositions of Examples 1 and 41 to 44 in which the resin content was in the range of 1.5% by mass or more were Even when compared with the ink composition of Example 40, the "scratch resistance" evaluation was even better.
  • the ink compositions of Examples 1 and 45 containing a dispersible resin having an average particle size of 300 nm or less had even better "scratch resistance" evaluation than the ink composition of Example 46. there were.
  • the “1,3-propanediol” of Example 36 containing N,N-diethylformamide and further containing 1,3-propanediol was changed to 1,2- Examples 141 and 142, in which the alkanediol-based solvent "propylene glycol” was used, gave even better "drying property” evaluations.
  • "1,3-propanediol” of Example 70, which contains ⁇ -caprolactone and further contains 1,3-propanediol, as a cyclic ester-based solvent having a boiling point of 230°C or less is replaced with 1,2-alkanediol.
  • the "1,3-propanediol" of Example 105 which contains dipropylene glycol monomethyl ether and further contains 1,3-propanediol, as a glycol ether-based solvent having a boiling point of 230° C. or less is replaced with 1,2- Examples 145 and 146, in which the alkanediol-based solvent "propylene glycol” was used, gave even better "drying property” evaluations.
  • the ink set of the ink composition containing the water-soluble organic solvent A having a boiling point of 230° C. or less and the resin has high drying property and can improve the abrasion resistance of the coating film. I know you can.
  • Example 29 having a conductivity of 1000 ⁇ S/cm or more and 2500 ⁇ S/cm or less and the ink composition of Example 24 having a conductivity of 1000 ⁇ S/cm or less.
  • Example 134 which contains the ink composition of Example 29 (receiving solution) and the ink set of Comparative Example 11, which does not contain the water-soluble organic solvent A, is compared with the ink set of Comparative Example 11. The evaluations of "fairness”, “bleeding”, and "scratch resistance" were all good.
  • Example 133 containing the ink composition (overcoat ink) of Example 32 containing the water-soluble organic solvent A and the ink composition (cyan ink) of Comparative Example 7 not containing the water-soluble organic solvent A
  • the set was compared with the ink set of Comparative Example 10, which did not contain the ink composition containing the water-soluble organic solvent A, and the "drying property" evaluation, "bleeding” evaluation, and "scratch resistance” evaluation were good. there were. From these results, it was confirmed that the effect of the invention of the present application is achieved by containing the "water-soluble organic solvent A" in at least one ink composition constituting the ink set.
  • the ink sets of Examples 148, 150, 152, 154, 156, 158, 160, 162, and 164 149, 151, 153, 155, 157, 159, 161, and 163, the "scratch resistance" is good.
  • the ink sets of Examples 148, 150, 152, 154, 156, 158, 160, 162 and 164 contain the ink compositions of Examples 142, 144 and 146 containing a silicone surfactant. From this, it was confirmed that an ink set containing an ink composition containing a silicone (silicon)-based surfactant can form a coating film with high scratch resistance.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)

Abstract

L'invention fournit une composition d'encre qui présente des propriétés de séchage élevées, et une meilleure résistance à l'abrasion d'un film d'application.　Plus précisément, l'invention concerne une composition d'encre pour jet d'encre qui comprend un solvant organique hydrosoluble et une résine, et qui comprend au moins une partie de la résine en tant que résine dispersive. Ce solvant organique hydrosoluble comprend au moins une sorte de solvant organique hydrosoluble (A) choisie parmi un solvant à base d'amide de point d'ébullition inférieur ou égal à 230°C, un solvant à base d'ester cyclique de point d'ébullition inférieur ou égal à 230°C et un solvant à base d'éther glycolique de point d'ébullition inférieur ou égal à 230°C.
PCT/JP2023/006539 2022-02-22 2023-02-22 Composition d'encre, ensemble d'encre, objet enregistré obtenu par application de la composition d'encre sur un substrat, procédé d'enregistrement, procédé de fabrication d'objet enregistré, et dispositif d'enregistrement à jet d'encre dans lequel est installé un réceptacle d'admission rempli de composition d'encre Ceased WO2023163064A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2024503233A JPWO2023163064A1 (fr) 2022-02-22 2023-02-22

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-026125 2022-02-22
JP2022026125 2022-02-22

Publications (1)

Publication Number Publication Date
WO2023163064A1 true WO2023163064A1 (fr) 2023-08-31

Family

ID=87766016

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/006539 Ceased WO2023163064A1 (fr) 2022-02-22 2023-02-22 Composition d'encre, ensemble d'encre, objet enregistré obtenu par application de la composition d'encre sur un substrat, procédé d'enregistrement, procédé de fabrication d'objet enregistré, et dispositif d'enregistrement à jet d'encre dans lequel est installé un réceptacle d'admission rempli de composition d'encre

Country Status (2)

Country Link
JP (1) JPWO2023163064A1 (fr)
WO (1) WO2023163064A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005015672A (ja) * 2003-06-27 2005-01-20 Toyo Ink Mfg Co Ltd ポリ塩化ビニル樹脂シート用非水性インクジェットインキ
JP2006045450A (ja) * 2004-08-09 2006-02-16 Konica Minolta Holdings Inc インクジェットインク及びインクジェット記録方法
JP2008216866A (ja) * 2007-03-07 2008-09-18 Seiko Epson Corp 液晶配向膜形成用組成物及び液晶表示装置の製造方法
JP2012224658A (ja) * 2011-04-15 2012-11-15 Konica Minolta Ij Technologies Inc インクジェットインク及びインクジェット記録方法
JP2013091711A (ja) * 2011-10-25 2013-05-16 Konica Minolta Ij Technologies Inc 機能性インクジェットインク及び機能性塗膜の形成方法
JP2014185207A (ja) * 2013-03-22 2014-10-02 Seiko Epson Corp インクジェット記録用の非水系インク組成物、インクジェット記録方法
WO2021201149A1 (fr) * 2020-03-31 2021-10-07 株式会社Ｄｎｐファインケミカル Composition d'encre non aqueuse, procédé d'enregistrement pour jet d'encre et procédé de fabrication d'imprimés
JP2021187095A (ja) * 2020-06-02 2021-12-13 セイコーエプソン株式会社 白色インク組成物及び記録方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005015672A (ja) * 2003-06-27 2005-01-20 Toyo Ink Mfg Co Ltd ポリ塩化ビニル樹脂シート用非水性インクジェットインキ
JP2006045450A (ja) * 2004-08-09 2006-02-16 Konica Minolta Holdings Inc インクジェットインク及びインクジェット記録方法
JP2008216866A (ja) * 2007-03-07 2008-09-18 Seiko Epson Corp 液晶配向膜形成用組成物及び液晶表示装置の製造方法
JP2012224658A (ja) * 2011-04-15 2012-11-15 Konica Minolta Ij Technologies Inc インクジェットインク及びインクジェット記録方法
JP2013091711A (ja) * 2011-10-25 2013-05-16 Konica Minolta Ij Technologies Inc 機能性インクジェットインク及び機能性塗膜の形成方法
JP2014185207A (ja) * 2013-03-22 2014-10-02 Seiko Epson Corp インクジェット記録用の非水系インク組成物、インクジェット記録方法
WO2021201149A1 (fr) * 2020-03-31 2021-10-07 株式会社Ｄｎｐファインケミカル Composition d'encre non aqueuse, procédé d'enregistrement pour jet d'encre et procédé de fabrication d'imprimés
JP2021187095A (ja) * 2020-06-02 2021-12-13 セイコーエプソン株式会社 白色インク組成物及び記録方法

Also Published As

Publication number Publication date
JPWO2023163064A1 (fr) 2023-08-31

Similar Documents

Publication Publication Date Title
JP7110512B1 (ja) インクセット
CN117396566A (zh) 水性油墨和包含该水性油墨的油墨组
CN117396567A (zh) 前处理油墨和包含该前处理油墨的油墨组
WO2023163064A1 (fr) Composition d'encre, ensemble d'encre, objet enregistré obtenu par application de la composition d'encre sur un substrat, procédé d'enregistrement, procédé de fabrication d'objet enregistré, et dispositif d'enregistrement à jet d'encre dans lequel est installé un réceptacle d'admission rempli de composition d'encre
WO2023163062A1 (fr) Ensemble d'encre, objet enregistré obtenu par application d'une composition d'encre contenant l'ensemble d'encre sur un substrat, procédé d'enregistrement, procédé de fabrication d'objet enregistré, et dispositif d'enregistrement à jet d'encre dans lequel est installé un réceptacle d'admission rempli de composition d'encre
WO2023163065A1 (fr) Composition d'encre, ensemble d'encre, objet enregistré obtenu par application de la composition d'encre sur un substrat, procédé d'enregistrement, procédé de fabrication d'objet enregistré, et dispositif d'enregistrement à jet d'encre dans lequel est installé un réceptacle d'admission rempli de composition d'encre
WO2023163063A1 (fr) Composition d'encre, jeu d'encres, produit enregistré présentant une composition d'encre appliquée sur un matériau de base, procédé d'enregistrement, procédé de fabrication d'un produit enregistré et dispositif d'enregistrement à jet d'encre équipé d'un récipient de stockage rempli de la composition d'encre
JP2024007411A (ja) 水性インク組成物、記録方法、記録物の製造方法、記録物及びインクジェット記録装置
WO2022211024A1 (fr) Composition d'encre non aqueuse, procédé d'impression faisant appel à celle-ci, et procédé de production de matière imprimée
JP2023133065A (ja) 非水系インク組成物、インクセット、それを用いた記録方法、記録物の製造方法、記録物、及びインクジェット記録装置
WO2022211028A1 (fr) Composition d'encre non aqueuse, procédé d'impression, et procédé de production d'un matériau imprimé
KR102893929B1 (ko) 잉크 세트
JP7168808B1 (ja) インク組成物、インクセット、記録方法、記録物の製造方法、及び記録物
JP7366309B1 (ja) 水性インク組成物、記録方法、記録物の製造方法、記録物及びインクジェット記録装置
JP7229415B2 (ja) 非水性インク組成物、それを用いた記録方法、及び記録物の製造方法
JP7110507B1 (ja) 非水性インク組成物、それを用いた記録方法、及び記録物の製造方法
JP7296003B1 (ja) 非水系インク組成物、記録方法、記録物の製造方法、インクセット、記録物、及びインクジェット記録装置
JP7161569B2 (ja) 非水性インク組成物、それを用いた記録方法、及び記録物の製造方法
JP7288545B2 (ja) インク組成物、インクセット、記録方法、記録物の製造方法、及び記録物
JP2020082360A (ja) 印刷方法、印刷装置、インク、及びインク収容容器
WO2023120150A1 (fr) Liquide de maintenance et jeu d'encres
JP2022157934A (ja) 非水性インク組成物、インクジェット記録方法及び印刷物の製造方法
JP2024050444A (ja) インク、インクセット、画像形成方法、及び画像形成装置
EP4549524A1 (fr) Composition d'encre aqueuse, procédé d'enregistrement, procédé de fabrication d'enregistrement, enregistrement, et dispositif d'enregistrement à jet d'encre
JP2022191658A (ja) インクセット、記録物、記録方法、及び記録物の製造方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23760063

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2024503233

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 23760063

Country of ref document: EP

Kind code of ref document: A1