JP2009258619A - Resin composition used for forming color filter by inkjet system, color filter and liquid crystal display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin composition used for forming color filter by an inkjet system for forming a pixel which is excellent in flatness and does not produce an uncoated part. <P>SOLUTION: The resin composition used for forming color filter by the inkjet system includes a colorant (A), a polyfunctional monomer (B), a binder resin (C), a surfactant (D) having an HLB value of 10 or less, and an organic solvent (E) containing more than 70 mass% of an organic solvent having a boiling point of higher than 180°C at 1 atm with respect to the amount of the whole organic solvent. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a resin composition for producing a color filter used for a color liquid crystal display device or a color image pickup tube element by an ink jet method, a color filter having a pixel pattern formed from the resin composition by an ink jet method, and The present invention relates to a liquid crystal display device.

  In producing a color filter used for a color liquid crystal display (LCD) or the like, a colored radiation-sensitive composition film is usually formed on a substrate or a substrate on which a light-shielding layer having a desired pattern has been previously formed. By irradiating with radiation through a photomask having the pattern shape (hereinafter referred to as “exposure”), developing and dissolving and removing unexposed portions, and then post-baking using a clean oven or hot plate A method of forming a pixel pattern of each color is known (Patent Document 1 and Patent Document 2). However, these methods have problems such as a complicated pixel pattern forming process and high cost.

On the other hand, a method for producing an ink jet color filter and a resin composition for an ink jet color filter, which includes a step of forming a colored layer of a color filter using an ink jet head are known (Patent Documents 3 to 5). .
Also, it is known that a specific solvent is contained in the color filter resin composition in order to improve ink stability, dischargeability, and the like (Patent Document 6).
However, when a pixel is formed in a narrow area partitioned by a partition formed on a transparent substrate by an inkjet method, the shape of the pixel depends on the affinity between the ink and the partition surface, etc. The film thickness is such that it has a thin part along the part or its vicinity and has a maximum part of the film thickness on the center side of the pixel, or the surface is uneven. There was a problem that non-uniform pixels were likely to occur.
Also, due to the affinity between the ink and the transparent substrate and the size of the opening area partitioned by the partition walls, the ink does not spread within the pixel and may be left unpainted (also called pinholes, white spots, white defects, etc.) There was a problem that occurred.
JP-A-2-144502 JP-A-3-53201 JP-A-4-261503 JP 7-318723 A JP 2000-310706 A JP 2006-299090 A

  The subject of this invention is providing the resin composition used in order to form a color filter by the inkjet system which can form the pixel which is excellent in flatness and does not produce the unpainted part.

  The inventors of the present invention conducted intensive research on a resin composition used for forming a color filter by an inkjet method. As a result, a surfactant having an HLB value of 10 or less and a boiling point of 180 at 1 atm are included in the resin composition. A resin composition used for forming a color filter by an ink jet method capable of forming a pixel that has excellent flatness and does not cause an unpainted portion by containing an organic solvent at a temperature higher than ℃ is obtained. The present invention has been completed.

That is, the present invention contains (A) a colorant, (B) a polyfunctional monomer, (C) a binder resin, (D) a surfactant having an HLB value of 10 or less, and (E) an organic solvent, And (E) a resin composition used for forming a color filter by an ink jet method, wherein the organic solvent contains an organic solvent having a boiling point of more than 180 ° C. at 1 atm. Is to provide.
The present invention also provides a color filter having a pixel pattern formed by an ink jet method using the resin composition, and a liquid crystal display device including the color filter.

According to the resin composition of the present invention, it is possible to form a pixel that is excellent in flatness and does not cause an unpainted portion by an inkjet method.
Therefore, the resin composition of the present invention is extremely useful for the production of various color filters and liquid crystal display devices including color filters for color liquid crystal display devices in the electronic industry.

  Hereinafter, the present invention will be described in detail.

Resin Composition- (A) Colorant-
The colorant in the present invention is not particularly limited and may be an organic pigment or an inorganic pigment. Of these, organic pigments are preferred because the color filters are required to have high purity and highly transparent color development and heat resistance.

Examples of the organic pigment include, for example, compounds classified as pigments in the color index (CI; issued by The Society of Dyers and Colorists), specifically, the following color index (C.I. ) Can be listed.
C. I. Pigment yellow 12, C.I. I. Pigment yellow 13, C.I. I. Pigment yellow 14, C.I. I. Pigment yellow 17, C.I. I. Pigment yellow 20, C.I. I. Pigment yellow 24, C.I. I. Pigment yellow 31, C.I. I. Pigment yellow 55, C.I. I. Pigment yellow 83, C.I. I. Pigment yellow 93, C.I. I. Pigment yellow 109, C.I. I. Pigment yellow 110, C.I. I. Pigment yellow 138, C.I. I. Pigment yellow 139, C.I. I. Pigment yellow 150, C.I. I. Pigment yellow 153, C.I. I. Pigment yellow 154, C.I. I. Pigment yellow 155, C.I. I. Pigment yellow 166, C.I. I. Pigment yellow 168, C.I. I. Pigment yellow 180, C.I. I. Pigment yellow 211;

C. I. Pigment orange 36, C.I. I. Pigment orange 43, C.I. I. Pigment orange 51, C.I. I. Pigment orange 61, C.I. I. Pigment orange 71; C.I. I. Pigment red 9, C.I. I. Pigment red 97, C.I. I. Pigment red 122, C.I. I. Pigment red 123, C.I. I. Pigment red 149, C.I. I. Pigment red 166, C.I. I. Pigment red 168, C.I. I. Pigment red 175, C.I. I. Pigment red 176, C.I. I. Pigment red 177, C.I. I. Pigment red 180, C.I. I. Pigment red 185, C.I. I. Pigment red 207, C.I. I. Pigment red 208, C.I. I. Pigment red 209, C.I. I. Pigment red 215, C.I. I. Pigment red 224, C.I. I. Pigment red 242, C.I. I. Pigment red 243, C.I. I. Pigment red 254;
C. I. Pigment violet 19, pigment violet 23, pigment violet 29;
C. I. Pigment blue 15, C.I. I. Pigment blue 60, C.I. I. Pigment blue 15: 3, C.I. I. Pigment blue 15: 4, C.I. I. Pigment blue 15: 6;
C. I. Pigment green 7, C.I. I. Pigment green 36, C.I. I. Pigment green 58, C.I. I. Pigment green 136, C.I. I. Pigment green 210; I. Pigment brown 23, C.I. I. Pigment Brown 25.
These organic pigments can be used alone or in admixture of two or more.

  In the present invention, the organic pigment can be purified and used by a recrystallization method, a reprecipitation method, a solvent washing method, a sublimation method, a vacuum heating method, or a combination thereof.

Examples of the inorganic pigment include titanium oxide, barium sulfate, calcium carbonate, zinc white, lead sulfate, yellow lead, zinc yellow, red bean [red iron oxide (III)], cadmium red, ultramarine blue, bitumen, and chromium oxide. Examples include green, cobalt green, amber, titanium black, synthetic iron black, and carbon black.
These inorganic pigments can be used alone or in admixture of two or more.

In the present invention, if necessary, one or more dyes or natural pigments can be used in combination with the pigment.
In the present invention, the pigment can be used by modifying the particle surface with a polymer, if desired. Examples of the polymer that modifies the particle surface of the pigment include the polymers described in JP-A-8-259876 and various commercially available polymers or oligomers for dispersing pigments.

In the present invention, when a pigment is used as a colorant, in the presence of a dispersing agent and a dispersing aid to be added as necessary in an organic solvent, optionally together with a part of the component (C) described later. For example, it is preferable to use a pigment dispersion prepared by mixing and dispersing while pulverizing using a dissolver, rod mill, bead mill, roll mill or the like. The average particle size of the pigment in the pigment dispersion thus obtained is preferably 50 to 400 nm, more preferably 50 to 150 nm.
In order to form a pixel that is excellent in flatness and does not cause an unpainted portion, the yield value of the pigment dispersion is preferably small, preferably 200 mPa or less, more preferably 150 mPa or less. The reason is considered as follows. After the resin composition is discharged into the region partitioned by the partition wall by the inkjet method, the droplets of the resin composition are spread and spread while the organic solvent is evaporated and concentrated through the heating process. If the yield value of the resin composition in which the organic solvent is volatilized to some extent is small, the droplets can easily flow even with a small external force (gravity). As a result, the flatness is excellent and no unpainted portion is generated. It is considered that pixels can be formed. Since the physical state of the resin composition in which the organic solvent is volatilized and concentrated to some extent is close to that of the pigment dispersion, it is considered that reducing the yield value of the pigment dispersion leads to the desired effect. The yield value is obtained by measuring the viscosity with different shear stress and using the Casson equation.

As the dispersant used for the preparation of the pigment dispersion, for example, an appropriate dispersant such as a cationic, anionic, nonionic or amphoteric can be used, but a pigment dispersion having a small yield value is obtained. In the meaning, a polymer dispersant is preferred. Specifically, a modified acrylic copolymer, an acrylic copolymer, polyurethane, polyester, an alkyl ammonium salt or a phosphate ester salt of a high molecular copolymer, a cationic comb graft polymer, and the like can be given. Here, the cationic comb graft polymer refers to a polymer having a structure in which two or more branched polymers are grafted to one molecule of a trunk polymer having a plurality of basic groups (cationic functional groups). Examples thereof include polymers composed of a ring-opening polymer in which the trunk polymer part is polyethyleneimine and the branch polymer part is ε-caprolactone. Among these dispersants, modified acrylic copolymers, polyurethanes, and cationic comb graft polymers are preferable.
Such a dispersant can be obtained commercially, for example, Disperbyk-2000, Disperbyk-2001 (above, manufactured by BYK Corporation) as a modified acrylic copolymer, Disperbyk-161 as polyurethane, Disperbyk-162, Disperbyk-165, Disperbyk-167, Disperbyk-170, Disperbyk-182 (above, manufactured by BYK Corporation (BYK)), as a cationic comb-type graft polymer, Solsperse 24000, Solsperse 37000, Solsperse 56000, Solsperse 76500 Lubrizol Co., Ltd.), Addisper PB821, Addisper PB822, Addisper PB823, Addisper PB824, Addisper P 827, Ajisper PB880, Adisper PB881 (or more, Ajinomoto Fine-Techno Co., Ltd.), and the like.

The content of the dispersant when preparing the pigment dispersion depends on the combination of the pigment and the dispersant to be used, but is usually 100 parts by mass or less, preferably 0.5 to 100 parts per 100 parts by mass of the pigment. Parts by mass, more preferably 1 to 70 parts by mass, and particularly preferably 10 to 60 parts by mass. In this case, when the content of the dispersant exceeds 100 parts by mass, the strength and the like of the obtained pixel may be impaired.
Moreover, as an organic solvent used when preparing a pigment dispersion liquid, the thing similar to the below-mentioned organic solvent can be mentioned, for example.
Content of the organic solvent at the time of preparing a pigment dispersion liquid is 200-1,200 mass parts normally with respect to 100 mass parts of pigments, Preferably it is 300-1000 mass parts.

  Examples of the dispersion aid used for the preparation of the pigment dispersion include pigment derivatives such as copper phthalocyanine derivatives.

-(B) polyfunctional monomer-
The polyfunctional monomer in the present invention is a monomer having two or more polymerizable unsaturated bonds.

Examples of the polyfunctional monomer include di (meth) acrylates of alkylene glycols such as ethylene glycol and propylene glycol;
Di (meth) acrylates of polyalkylene glycols such as polyethylene glycol and polypropylene glycol;
Poly (meth) acrylates of trihydric or higher polyhydric alcohols such as glycerin, trimethylolpropane, pentaerythritol, dipentaerythritol, and their dicarboxylic acid modified products or alkylene oxide modified products;
Oligo (meth) acrylates such as polyester, epoxy resin, urethane resin, alkyd resin, silicone resin, spirane resin;
Di (meth) acrylates of both ends hydroxylated polymers such as both ends hydroxypoly-1,3-butadiene, both ends hydroxypolyisoprene, both ends hydroxypolycaprolactone, and tris [2- (meth) acryloyloxyethyl] A phosphate etc. can be mentioned.

Among these polyfunctional monomers, poly (meth) acrylates of trihydric or higher polyhydric alcohols and their dicarboxylic acid modified products or alkylene oxide modified products, specifically, trimethylolpropane tri (meth) acrylate, Pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, compounds represented by the following formulas (1) to (4), etc. In particular, trimethylolpropane triacrylate, pentaerythritol triacrylate, dipentaerythritol hexaacrylate, a compound in which all R are hydrogen atoms in the following formula (1), and all R in the following formula (2) are hydrogen atoms Ah Compound, a compound in which all Xs are acryloyl groups in the following formula (3) and a compound in which all Xs are acryloyl groups in the following formula (4) are excellent in pixel strength and surface smoothness, and This is preferable in that ground stains and film residues are hardly generated on the substrate and the light shielding layer.
The said polyfunctional monomer can be used individually or in mixture of 2 or more types.

[In Formula (1) and Formula (2), R represents a hydrogen atom or a methyl group mutually independently. ]

[In Formula (3) and Formula (4), R ¹ independently represents an ethylene group or a propylene group, X independently represents an acryloyl group or a methacryloyl group, and m represents independently from each other 0-15. And the sum of each m is 2 to 35, n is independently an integer of 0 to 15 and the sum of each n is 2 to 40. ]

  The content of the polyfunctional monomer in the present invention is preferably 5 to 1,000 parts by mass, more preferably 20 to 300 parts by mass with respect to 100 parts by mass of the (A) pigment. In this case, if the content of the polyfunctional monomer is less than 5 parts by mass, the strength and surface smoothness of the pixel tend to be reduced. On the other hand, if it exceeds 1,000 parts by mass, the pigment concentration is relatively lowered. Therefore, it may be difficult to achieve a target color density as a thin film.

-(C) Binder resin-
The binder resin in the present invention is not particularly limited as long as it functions as a binder for (A) the colorant, but is preferably an alkali-soluble resin having a carboxyl group, particularly one or more. An ethylenically unsaturated monomer having a carboxyl group (hereinafter referred to as “carboxyl group-containing unsaturated monomer”) and another ethylenically unsaturated monomer copolymerizable therewith (hereinafter referred to as “copolymerization”). Copolymer (hereinafter referred to as “carboxyl group-containing copolymer”).

As the carboxyl group-containing unsaturated monomer, for example,
Unsaturated monocarboxylic acids such as (meth) acrylic acid, crotonic acid, α-chloroacrylic acid, cinnamic acid;
Unsaturated dicarboxylic acids such as maleic acid, maleic anhydride, fumaric acid, itaconic acid, itaconic anhydride, citraconic acid, citraconic anhydride, mesaconic acid or the like;
A trivalent or higher unsaturated polycarboxylic acid or anhydride thereof;
Mono [(meth) acryloyloxyalkyl] esters of divalent or higher polyvalent carboxylic acids such as succinic acid mono [2- (meth) acryloyloxyethyl] and phthalic acid mono [2- (meth) acryloyloxyethyl];
Examples thereof include mono (meth) acrylates of polymers having a carboxy group and a hydroxyl group at both ends, such as ω-carboxypolycaprolactone mono (meth) acrylate.
The carboxyl group-containing unsaturated monomers can be used alone or in admixture of two or more.
In the present invention, the carboxyl group-containing unsaturated monomer is preferably (meth) acrylic acid, succinic acid mono [2- (meth) acryloyloxyethyl], ω-carboxypolycaprolactone mono (meth) acrylate, Particularly preferred is (meth) acrylic acid.

Examples of the copolymerizable unsaturated monomer include:
N-phenylmaleimide, N-o-hydroxyphenylmaleimide, Nm-hydroxyphenylmaleimide, Np-hydroxyphenylmaleimide, N-benzylmaleimide, N-cyclohexylmaleimide, N-succinimidyl-3-maleimidobenzoate, N- N-substituted maleimides such as succinimidyl-4-maleimidobutyrate, N-succinimidyl-6-maleimidocaproate, N-succinimidyl-3-maleimidopropionate, N- (acridinyl) maleimide;
Styrene, α-methylstyrene, o-vinyltoluene, m-vinyltoluene, p-vinyltoluene, p-chlorostyrene, o-methoxystyrene, m-methoxystyrene, p-methoxystyrene, o-vinylphenol, m-vinyl Phenol, p-vinylphenol, p-hydroxy-α-methylstyrene, o-vinylbenzylmethyl ether, m-vinylbenzylmethyl ether, p-vinylbenzylmethyl ether, o-vinylbenzylglycidyl ether, m-vinylbenzylglycidyl ether , Aromatic vinyl compounds such as p-vinylbenzyl glycidyl ether;
Indenes such as indene and 1-methylindene;

Methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, i-propyl (meth) acrylate, n-butyl (meth) acrylate, i-butyl (meth) acrylate, sec-butyl (meth) Acrylate, t-butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 2-hydroxybutyl ( (Meth) acrylate, 3-hydroxybutyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, allyl (meth) acrylate, benzyl (meth) acrylate, cyclohexyl (meth) acrylate, phenyl (meth) acrylate Rate, 2-methoxyethyl (meth) acrylate, 2-phenoxyethyl (meth) acrylate, polyethylene glycol (n = 2 to 100) methyl ether (meth) acrylate, polypropylene glycol (n = 2 to 100) methyl ether ( (Meth) acrylate, polyethylene glycol (n = 2 to 15) mono (meth) acrylate, polypropylene glycol (n = 2 to 15) mono (meth) acrylate, isobornyl (meth) acrylate, tricyclo [5.2.1.0 ^{2 , 6} ] decan-8-yl (meth) acrylate, dicyclopentenyl acrylate, 2-hydroxy-3-phenoxypropyl (meth) acrylate, glycerol mono (meth) acrylate, 4-hydroxyphenyl (meth) acrylate, paracumyl fe Unsaturated carboxylic acid esters such as ethylene oxide-modified (meth) acrylates of diols;

2-aminoethyl (meth) acrylate, 2-dimethylaminoethyl (meth) acrylate, 2-aminopropyl (meth) acrylate, 2-dimethylaminopropyl (meth) acrylate, 3-aminopropyl (meth) acrylate, 3-dimethyl Unsaturated carboxylic acid aminoalkyl esters such as aminopropyl (meth) acrylate;
Unsaturated carboxylic acid glycidyl esters such as glycidyl (meth) acrylate;
Vinyl cyanide compounds such as (meth) acrylonitrile, α-chloroacrylonitrile, vinylidene cyanide;
Unsaturated amides such as (meth) acrylamide, α-chloroacrylamide, N-2-hydroxyethyl (meth) acrylamide;
Carboxylic acid vinyl esters such as vinyl acetate, vinyl propionate, vinyl butyrate, vinyl benzoate;
Unsaturated ethers such as vinyl methyl ether, vinyl ethyl ether, and allyl glycidyl ether;
Aliphatic conjugated dienes such as 1,3-butadiene, isoprene, chloroprene;
Examples thereof include macromonomers having a mono (meth) acryloyl group at the end of a polymer molecular chain such as polystyrene, polymethyl (meth) acrylate, poly-n-butyl (meth) acrylate, and polysiloxane.
These copolymerizable unsaturated monomers can be used alone or in admixture of two or more.

  In the present invention, copolymerizable unsaturated monomers include N-substituted maleimides, aromatic vinyl compounds, unsaturated carboxylic acid esters, macromonomers having a mono (meth) acryloyl group at the end of the polymer molecular chain, and the like. In particular, N-phenylmaleimide, N-cyclohexylmaleimide, styrene, α-methylstyrene, p-hydroxy-α-methylstyrene, methyl (meth) acrylate, n-butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate 2-hydroxyethyl (meth) acrylate, allyl (meth) acrylate, benzyl (meth) acrylate, polyethylene glycol (n = 2 to 10) methyl ether (meth) acrylate, polypropylene glycol (n = 2 to 10) methyl Ether (meth) acrylate, Polyethylene glycol (n = 2 to 10) mono (meth) acrylate, polypropylene glycol (n = 2 to 10) mono (meth) acrylate, dicyclopentenyl (meth) acrylate, glycerol mono (meth) acrylate, 4-hydroxyphenyl ( Preference is given to (meth) acrylates, ethylene oxide modified (meth) acrylates of paracumylphenol, polystyrene macromonomers, polymethylmethacrylate macromonomers and the like.

As a preferable specific example of the carboxyl group-containing copolymer,
(Meth) acrylic acid / N-phenylmaleimide / styrene / benzyl (meth) acrylate copolymer,
(Meth) acrylic acid / Nm-hydroxyphenylmaleimide / styrene / benzyl (meth) acrylate copolymer,
(Meth) acrylic acid / Np-hydroxyphenylmaleimide / styrene / benzyl (meth) acrylate copolymer,
(Meth) acrylic acid / N-cyclohexylmaleimide / styrene / benzyl (meth) acrylate copolymer,
(Meth) acrylic acid / N-phenylmaleimide / α-methylstyrene / benzyl (meth) acrylate copolymer,
(Meth) acrylic acid / N-phenylmaleimide / styrene / n-butyl (meth) acrylate copolymer,
(Meth) acrylic acid / N-phenylmaleimide / styrene / 2-ethylhexyl (meth) acrylate copolymer,
(Meth) acrylic acid / N-phenylmaleimide / p-hydroxy-α-methylstyrene / benzyl (meth) acrylate copolymer,
(Meth) acrylic acid / N-phenylmaleimide / styrene / n-butyl (meth) acrylate copolymer,
(Meth) acrylic acid / N-phenylmaleimide / styrene / 2-ethylhexyl (meth) acrylate copolymer,
(Meth) acrylic acid / N-phenylmaleimide / styrene / 2-hydroxyethyl (meth) acrylate / benzyl (meth) acrylate copolymer,
(Meth) acrylic acid / N-phenylmaleimide / styrene / benzyl (meth) acrylate / glycerol mono (meth) acrylate copolymer,
(Meth) acrylic acid / Np-hydroxyphenylmaleimide / styrene / benzyl (meth) acrylate / glycerol mono (meth) acrylate copolymer,
(Meth) acrylic acid / N-phenylmaleimide / styrene / phenyl (meth) acrylate / 2-hydroxyethyl (meth) acrylate / polystyrene macromonomer copolymer,
(Meth) acrylic acid / N-phenylmaleimide / styrene / phenyl (meth) acrylate / 2-hydroxyethyl (meth) acrylate / polymethylmethacrylate macromonomer copolymer,
(Meth) acrylic acid / N-phenylmaleimide / styrene / benzyl (meth) acrylate / n-butyl (meth) acrylate / 2-hydroxyethyl (meth) acrylate copolymer,
(Meth) acrylic acid / N-phenylmaleimide / styrene / benzyl (meth) acrylate / n-butyl (meth) acrylate / glycerol mono (meth) acrylate copolymer,
(Meth) acrylic acid / N-phenylmaleimide / styrene / benzyl (meth) acrylate / 2-ethylhexyl (meth) acrylate / 2-hydroxyethyl (meth) acrylate copolymer,
(Meth) acrylic acid / N-phenylmaleimide / styrene / benzyl (meth) acrylate / 2-ethylhexyl (meth) acrylate / glycerol mono (meth) acrylate copolymer,
(Meth) acrylic acid / N-phenylmaleimide / styrene / polyethylene glycol (n = 2 to 10) methyl ether (meth) acrylate / dicyclopentenyl (meth) acrylate copolymer,
(Meth) acrylic acid / N-phenylmaleimide / styrene / polypropylene glycol (n = 2 to 10) methyl ether (meth) acrylate / dicyclopentenyl (meth) acrylate copolymer,
(Meth) acrylic acid / N-phenylmaleimide / styrene / polyethylene glycol (n = 2 to 10) methyl ether (meth) acrylate / dicyclopentenyl (meth) acrylate / glycerol mono (meth) acrylate copolymer,
(Meth) acrylic acid / N-phenylmaleimide / styrene / polypropylene glycol (n = 2 to 10) methyl ether (meth) acrylate / dicyclopentenyl (meth) acrylate / glycerol mono (meth) acrylate copolymer,

(Meth) acrylic acid / succinic acid mono [2- (meth) acryloyloxyethyl] / N-phenylmaleimide / styrene / benzyl (meth) acrylate copolymer,
(Meth) acrylic acid / succinic acid mono [2- (meth) acryloyloxyethyl] / Np-hydroxyphenylmaleimide / styrene / benzyl (meth) acrylate copolymer,
(Meth) acrylic acid / succinic acid mono [2- (meth) acryloyloxyethyl] / N-phenylmaleimide / styrene / allyl (meth) acrylate copolymer,
(Meth) acrylic acid / succinic acid mono [2- (meth) acryloyloxyethyl] / N-cyclohexylmaleimide / styrene / allyl (meth) acrylate copolymer,
(Meth) acrylic acid / succinic acid mono [2- (meth) acryloyloxyethyl] / N-cyclohexylmaleimide / styrene / benzyl (meth) acrylate copolymer,
(Meth) acrylic acid / succinic acid mono [2- (meth) acryloyloxyethyl] / N-phenylmaleimide / styrene / n-butyl (meth) acrylate / 2-hydroxyethyl (meth) acrylate copolymer,
(Meth) acrylic acid / succinic acid mono [2- (meth) acryloyloxyethyl] / N-phenylmaleimide / styrene / n-butyl (meth) acrylate / glycerol mono (meth) acrylate copolymer,
(Meth) acrylic acid / succinic acid mono [2- (meth) acryloyloxyethyl] / N-phenylmaleimide / styrene / 2-ethylhexyl (meth) acrylate / 2-hydroxyethyl (meth) acrylate copolymer,
(Meth) acrylic acid / succinic acid mono [2- (meth) acryloyloxyethyl] / N-phenylmaleimide / styrene / 2-ethylhexyl (meth) acrylate / glycerol mono (meth) acrylate copolymer,

(Meth) acrylic acid / ω-carboxypolycaprolactone mono (meth) acrylate / Nm-hydroxyphenylmaleimide / styrene / benzyl (meth) acrylate copolymer,
(Meth) acrylic acid / ω-carboxypolycaprolactone mono (meth) acrylate / Np-hydroxyphenylmaleimide / styrene / benzyl (meth) acrylate copolymer,
(Meth) acrylic acid / ω-carboxypolycaprolactone mono (meth) acrylate / N-phenylmaleimide / styrene / benzyl (meth) acrylate / glycerol mono (meth) acrylate copolymer,
(Meth) acrylic acid / ω-carboxypolycaprolactone mono (meth) acrylate / Np-hydroxyphenylmaleimide / styrene / benzyl (meth) acrylate / glycerol mono (meth) acrylate copolymer,
(Meth) acrylic acid / ω-carboxypolycaprolactone mono (meth) acrylate / N-phenylmaleimide / styrene / n-butyl (meth) acrylate / 2-hydroxyethyl (meth) acrylate copolymer,
(Meth) acrylic acid / ω-carboxypolycaprolactone mono (meth) acrylate / N-phenylmaleimide / styrene / n-butyl (meth) acrylate / glycerol mono (meth) acrylate copolymer,
(Meth) acrylic acid / ω-carboxypolycaprolactone mono (meth) acrylate / N-phenylmaleimide / styrene / 2-ethylhexyl (meth) acrylate / 2-hydroxyethyl (meth) acrylate copolymer,
(Meth) acrylic acid / ω-carboxypolycaprolactone mono (meth) acrylate / N-phenylmaleimide / styrene / 2-ethylhexyl (meth) acrylate / glycerol mono (meth) acrylate copolymer and the like.

  The copolymerization ratio of the carboxyl group-containing unsaturated monomer in the carboxyl group-containing copolymer is usually 5 to 50% by mass, preferably 10 to 40% by mass.

  In the present invention, for example, a binder resin obtained by copolymerizing an unsaturated compound having a hydroxyl group such as 2-hydroxyethyl (meth) acrylate is reacted with an unsaturated isocyanate compound such as 2- (meth) acryloyloxyethyl isocyanate. By making it, a polymerizable unsaturated bond can be introduce | transduced into the side chain of binder resin.

The weight average molecular weight in terms of polystyrene (hereinafter referred to as “Mw”) measured by gel permeation chromatography (GPC, elution solvent: tetrahydrofuran) of the binder resin in the present invention is usually 3,000 to 300,000, preferably 5,000 to 100,000.
In addition, the number average molecular weight in terms of polystyrene (hereinafter referred to as “Mn”) measured by gel permeation chromatography (GPC, elution solvent: tetrahydrofuran) of the binder resin in the present invention is usually 3,000 to 60,000, Preferably it is 5,000-25,000.
Moreover, the ratio (Mw / Mn) of Mw and Mn of the binder resin in the present invention is preferably 1 to 5, more preferably 1 to 4.

  The binder resin may be, for example, (meth) acrylic acid or the like in a suitable solvent, 2,2′-azobisisobutyronitrile, 2,2′-azobis (2,4-dimethylvaleronitrile), 2,2 It can be produced by polymerization in the presence of a radical polymerization initiator such as' -azobis (4-methoxy-2,4-dimethylvaleronitrile).

The binder resin can be purified through a reprecipitation method using two or more organic solvents having different polarities after radical polymerization of the polymerizable unsaturated compound as described above. That is, after removing insoluble impurities from the solution in a good solvent after polymerization by filtration or centrifugation as necessary, a large amount (usually 5 to 10 times the volume of the polymer solution) of a precipitant (poor) Purification by pouring into the solvent) and reprecipitation of the copolymer. At that time, of the impurities remaining in the polymer solution, impurities soluble in the precipitant remain in the liquid phase and are separated from the purified copolymer (C1) and the like.
Examples of the good solvent / precipitant combination used in this reprecipitation method include diethylene glycol monomethyl ether acetate / n-hexane, methyl ethyl ketone / n-hexane, diethylene glycol monomethyl ether acetate / n-heptane, and methyl ethyl ketone / n-heptane. Can be mentioned.

  The binder resin may be, for example, each unsaturated compound that is a constituent component of 2,2′-azobisisobutyronitrile, 2,2′-azobis (2,4-dimethylvaleronitrile), 2,2 Radical polymerization initiators such as' -azobis (4-methoxy-2,4-dimethylvaleronitrile), and pyrazole-1-dithiocarboxylic acid cyano (dimethyl) methyl ester, pyrazole-1-dithiocarboxylic acid benzyl ester, tetraethylthiuram Disulfide, bis (pyrazol-1-ylthiocarbonyl) disulfide, bis (3-methyl-pyrazol-1-ylthiocarbonyl) disulfide, bis (4-methyl-pyrazol-1-ylthiocarbonyl) disulfide, bis (5- Methyl-pyrazol-1-ylthiocarbonyl) disulfide, In the presence of a molecular weight regulator that acts as an iniferter such as bis (3,4,5-trimethyl-pyrazol-1-ylthiocarbonyl) disulfide, bis (pyrrol-1-ylthiocarbonyl) disulfide, bisthiobenzoyl disulfide, etc. It can manufacture by carrying out living radical polymerization by making reaction temperature into 0-150 degreeC normally in an active solvent, Preferably it is 50-120 degreeC.

In this invention, binder resin can be used individually or in mixture of 2 or more types.
In this invention, content of binder resin is 10-1,000 mass parts normally with respect to 100 mass parts of (A) pigments, Preferably it is 20-500 mass parts. In this case, if the total content of the binder resin is less than 10 parts by mass, for example, the storage stability of the resulting resin composition may be reduced, whereas if it exceeds 1,000 parts by mass, the colorant concentration is relatively high. Therefore, it may be difficult to achieve a target color density as a thin film.

-(D) Surfactant having an HLB value of 10 or less-
The resin composition in the present invention contains a surfactant having an HLB value of 10 or less (hereinafter referred to as “lipophilic surfactant”). By containing such a surfactant, it is possible to form a pixel that has good flatness and does not cause an unpainted portion by an inkjet method. In this invention, 0-9 are preferable and, as for the HLB value of surfactant, 0-7 are more preferable. Here, the HLB value used in the present invention can be obtained by a known method.

As the oleophilic surfactant, a silicone-based surfactant is preferable in that it forms a pixel having good flatness and no unpainted portion.
Examples of the silicone surfactant include side chain modified polydimethylsiloxane, both terminal modified polydimethylsiloxane, one terminal modified polydimethylsiloxane, and side chain both terminal modified polydimethylsiloxane. Examples thereof include polyether groups such as polyoxyethylene group, polyoxyethylene polyoxypropylene group, and polyglycerin group. More preferred silicone-based surfactants include polyether-modified polydimethylsiloxane, and particularly preferred examples include polyoxyethylene-modified polydimethylsiloxane and polyoxyethylene polyoxypropylene-modified polydimethylsiloxane.
Such surfactants are commercially available, for example, FZ-2122 (HLB value = 0), FZ-2110 (HLB = 0), FZ-7006 (HLB = 2), FZ-2166 ( HLB = 3), FZ-2164 (HLB = 4), FZ-7001 (HLB = 5), FZ-2120 (HLB = 6), SH 8400 (HLB = 7), FZ-7002 (HLB = 8), FZ -2104 (HLB = 9) (above, manufactured by Toray Dow Corning).
In this invention, a lipophilic surfactant can be used individually or in mixture of 2 or more types.

In the present invention, other surfactants can be used in combination with the lipophilic surfactant. Examples of such other surfactants include nonionic, cationic, and anionic surfactants.
The content ratio of the other surfactant is preferably 0 to 75 mass%, more preferably 0 to 50 mass%, based on the total amount of the lipophilic surfactant and the other surfactant.
The content of the lipophilic surfactant in the resin composition of the present invention is usually 0.01 to 3 with respect to 100 parts by mass of the solid content excluding the organic solvent from the viewpoint of preventing the occurrence of unpainted parts and preventing the roughening of the pixel surface. Part by mass, preferably 0.025 to 1 part by mass, more preferably 0.05 to 0.5 part by mass.

-(E) Organic solvent-
The organic solvent in the present invention has an organic solvent having a boiling point of more than 180 ° C at 1 atm, preferably more than 200 ° C and not more than 290 ° C, more preferably more than 220 ° C and not more than 280 ° C (hereinafter referred to as "high boiling point"). The solvent is also referred to as “solvent” in the total organic solvent in an amount of more than 70% by mass, preferably more than 80% by mass and 100% by mass, particularly preferably more than 90% by mass and 100% by mass.
When the content of the high-boiling solvent is 70% by mass or less, the resin composition is easily dried, not only the ink ejection property is deteriorated, but also the balance between the leveling speed and the drying speed of the resin composition is lost, and thus the resin composition is obtained. The flatness of the pixel and the spread of the resin composition on the substrate may also be deteriorated.

Examples of the high boiling point solvent include organic solvents having two acetate structures represented by glycol diacetate such as propylene glycol diacetate, 1,3-butylene glycol diacetate, and 1,6-hexanediol diacetate;
Diethylene glycol monomethyl ether acetate, diethylene glycol monoethyl ether acetate, diethylene glycol mono-n-propyl ether acetate, diethylene glycol monoethyl ether acetate, diethylene glycol mono-n-butyl ether acetate, dipropylene glycol monomethyl ether acetate, ethylene glycol monobutyl ether acetate, ethylene glycol mono An organic solvent having one acetate structure such as phenyl ether acetate, propylene glycol butyl ether acetate, 3-methyl-3-methoxybutyl acetate;
Ethylene glycol monoisoamyl ether, ethylene glycol monohexyl ether, ethylene glycol monophenyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol mono-n-propyl ether, diethylene glycol mono-n-butyl ether, triethylene glycol monomethyl ether, triethylene Glycol monoethyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, dipropylene glycol mono-n-propyl ether, dipropylene glycol mono-n-butyl ether, tripropylene glycol monomethyl ether, tripropylene glycol monoethyl ether, Benzylethyle Ter, dihexyl ether, diethylene glycol diethyl ether, acetonyl acetone, isophorone, caproic acid, caprylic acid, 1-octanol, 1-nonanol, benzyl acetate, ethyl benzoate, diethyl oxalate, diethyl maleate, γ-butyrolactone, ethylene carbonate , Propylene carbonate, N-methylpyrrolidone and the like. Among these, from the viewpoint of dispersion stability of the resin composition, an organic solvent having two acetate structures is preferred, glycol diacetate is more preferred, glycol diacetate having 2 to 6 carbon atoms is further preferred, and 1,3- Butylene glycol diacetate is particularly preferred.
The high boiling point solvents can be used alone or in admixture of two or more.

Moreover, in this invention, another organic solvent can also be used together with a high boiling point solvent.
As such other organic solvents, for example,
Alcohols such as methanol, ethanol, benzyl alcohol;
(Poly) alkylene glycol monoalkyl ethers such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, erene glycol mono-n-propyl ether, ethylene glycol mono-n-butyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether;

(Poly) alkylene glycol monoalkyl such as ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol mono-n-propyl ether acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, 3-methoxybutyl acetate Ether acetate;
Other ethers such as diethylene glycol dimethyl ether, diethylene glycol methyl ethyl ether, tetrahydrofuran;
Ketones such as methyl ethyl ketone, cyclohexanone, 2-heptanone, 3-heptanone, diacetone alcohol (4-hydroxy-4-methylpentan-2-one), 4-hydroxy-4-methylhexane-2-one;

Lactic acid alkyl esters such as methyl lactate and ethyl lactate;
Ethyl acetate, n-propyl acetate, i-propyl acetate, n-butyl acetate, i-butyl acetate, n-pentyl formate, i-pentyl acetate, n-butyl propionate, ethyl butyrate, n-propyl butyrate, i-butyric acid -Propyl, n-butyl butyrate, ethyl hydroxyacetate, ethyl ethoxyacetate, methyl 3-methoxypropionate, ethyl 3-methoxypropionate, methyl 3-ethoxypropionate, ethyl 3-ethoxypropionate, methyl pyruvate, pyruvate Esters such as ethyl, n-propyl pyruvate, methyl acetoacetate, ethyl acetoacetate, ethyl 2-hydroxy-2-methylpropionate, methyl 2-hydroxy-3-methylbutyrate, ethyl 2-oxobutyrate;
Aromatic hydrocarbons such as toluene and xylene;
Examples thereof include amides such as N, N-dimethylformamide and N, N-dimethylacetamide.

Among these other organic solvents, benzyl alcohol, ethylene glycol mono-n-butyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, ethylene glycol monomethyl ether acetate, propylene glycol from the viewpoint of solubility, pigment dispersibility, etc. Monomethyl ether acetate, propylene glycol monoethyl ether acetate, 3-methoxybutyl acetate, diethylene glycol dimethyl ether, diethylene glycol methyl ethyl ether, cyclohexanone, 2-heptanone, 3-heptanone, n-butyl acetate, i-butyl acetate, n-pentyl formate I-pentyl acetate, 3-methoxybutyl acetate, n-butyl propionate, ethyl butyrate, i-propyl butyrate, Acid n- butyl, 3-methoxy ethyl propionate, methyl 3-ethoxypropionate, ethyl 3-ethoxypropionate, ethyl pyruvate are preferred.
These other organic solvents can be used alone or in admixture of two or more.

  The content of the organic solvent is preferably such that the total concentration of each component excluding the organic solvent is 5 to 35% by mass from the viewpoint of ink discharge properties and storage stability of the obtained resin composition. The amount of mass% is more preferable.

-(F) Photopolymerization initiator-
Radiation sensitivity can be imparted to the resin composition of the present invention by blending (F) a photopolymerization initiator. The photopolymerization initiator in the present invention generates an active species capable of initiating polymerization of the (B) polyfunctional monomer by exposure to radiation such as visible light, ultraviolet light, far ultraviolet light, electron beam, and X-ray. It is a compound that can.
Examples of such photopolymerization initiators include acetophenone compounds, biimidazole compounds, triazine compounds, O-acyloxime compounds, benzoin compounds, benzophenone compounds, α-diketone compounds, and polynuclear quinone compounds. , Xanthone compounds, diazo compounds, and the like.

  In the present invention, the photopolymerization initiator can be used alone or in admixture of two or more. As the photopolymerization initiator in the present invention, acetophenone compounds, biimidazole compounds, triazine compounds and At least one selected from the group of O-acyloxime compounds is preferred.

  In this invention, general content of a photoinitiator is 0.01-120 mass parts normally with respect to 100 mass parts of (B) polyfunctional monomers, Preferably it is 1-100 mass parts. is there.

Among preferred photopolymerization initiators in the present invention, specific examples of acetophenone compounds include, for example, 2-hydroxy-2-methyl-1-phenylpropanone-1, 2-methyl-1- (4-methylthiophenyl). 2-morpholinopropanone-1, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) butanone-1, 1-hydroxycyclohexyl phenyl ketone, 2,2-dimethoxy-1,2-diphenyl And ethanone-1.
Among these acetophenone compounds, in particular, 2-methyl-1- (4-methylthiophenyl) -2-morpholinopropanone-1, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) butanone -1 or the like is preferable.
The acetophenone compounds can be used alone or in admixture of two or more.

  Specific examples of the biimidazole compound include, for example, 2,2′-bis (2-chlorophenyl) -4,4 ′, 5,5′-tetrakis (4-ethoxycarbonylphenyl) -1,2 ′. -Biimidazole, 2,2'-bis (2-bromophenyl) -4,4 ', 5,5'-tetrakis (4-ethoxycarbonylphenyl) -1,2'-biimidazole, 2,2'-bis (2-Chlorophenyl) -4,4 ′, 5,5′-tetraphenyl-1,2′-biimidazole, 2,2′-bis (2,4-dichlorophenyl) -4,4 ′, 5,5 ′ -Tetraphenyl-1,2'-biimidazole, 2,2'-bis (2,4,6-trichlorophenyl) -4,4 ', 5,5'-tetraphenyl-1,2'-biimidazole, 2,2′-bis (2-bromofe ) -4,4 ′, 5,5′-tetraphenyl-1,2′-biimidazole, 2,2′-bis (2,4-dibromophenyl) -4,4 ′, 5,5′-tetra Phenyl-1,2′-biimidazole, 2,2′-bis (2,4,6-tribromophenyl) -4,4 ′, 5,5′-tetraphenyl-1,2′-biimidazole, etc. Can be mentioned.

Among these biimidazole compounds, 2,2′-bis (2-chlorophenyl) -4,4 ′, 5,5′-tetraphenyl-1,2′-biimidazole, 2,2′-bis (2 , 4-dichlorophenyl) -4,4 ′, 5,5′-tetraphenyl-1,2′-biimidazole, 2,2′-bis (2,4,6-trichlorophenyl) -4,4 ′, 5 , 5′-tetraphenyl-1,2′-biimidazole and the like are more preferable, and 2,2′-bis (2-chlorophenyl) -4,4 ′, 5,5′-tetraphenyl-1,2′- is particularly preferable. Biimidazole is preferred.
The above biimidazole compounds can be used alone or in admixture of two or more.

-Hydrogen donor-
In the present invention, when a biimidazole compound is used as a photopolymerization initiator, it is preferable to use the following hydrogen donor in combination in that the sensitivity can be further improved.
The “hydrogen donor” refers to a compound that can donate a hydrogen atom to a radical generated from a biimidazole compound by exposure, and a mercaptan compound, an amine compound, or the like is preferable.

A mercaptan compound is a compound having a benzene ring or a heterocyclic ring as a mother nucleus and having one or more, preferably 1 to 3, more preferably 1 to 2, mercapto groups bonded directly to the mother nucleus (hereinafter referred to as “mercaptan”). It is referred to as “system hydrogen donor”).
The amine compound is a compound having a benzene ring or a heterocyclic ring as a mother nucleus and having 1 or more, preferably 1 to 3, more preferably 1 to 2 amino groups directly bonded to the mother nucleus (hereinafter referred to as “the amine compound”). , "Amine-based hydrogen donor").
These hydrogen donors can also have a mercapto group and an amino group at the same time.

Hereinafter, these hydrogen donors will be described more specifically.
The mercaptan-based hydrogen donor can have one or more benzene rings or heterocyclic rings, and can have both a benzene ring and a heterocyclic ring. When two or more of these rings are present, It may or may not be formed.
In addition, when the mercaptan hydrogen donor has two or more mercapto groups, at least one of the remaining mercapto groups is substituted with an alkyl, aralkyl or aryl group as long as at least one free mercapto group remains. Furthermore, as long as at least one free mercapto group remains, a structural unit in which two sulfur atoms are bonded via a divalent organic group such as an alkylene group, or two sulfur atoms are It can have structural units linked in the form of disulfides.

In addition, the mercaptan-based hydrogen donor may be substituted with a carboxyl group, an alkoxycarbonyl group, a substituted alkoxycarbonyl group, a phenoxycarbonyl group, a substituted phenoxycarbonyl group, a nitrile group, or the like at a place other than the mercapto group.
Specific examples of such mercaptan-based hydrogen donors include 2-mercaptobenzothiazole, 2-mercaptobenzoxazole, 2-mercaptobenzoimidazole, 2,5-dimercapto-1,3,4-thiadiazole, 2- Examples include mercapto-2,5-dimethylaminopyridine. Of these mercaptan-based hydrogen donors, 2-mercaptobenzothiazole and 2-mercaptobenzoxazole are preferable, and 2-mercaptobenzothiazole is particularly preferable.

Next, the amine-based hydrogen donor can have one or more benzene rings or heterocyclic rings, and can have both a benzene ring and a heterocyclic ring. When these two or more rings are present, A condensed ring may or may not be formed.
In addition, in the amine-based hydrogen donor, one or more of the amino groups may be substituted with an alkyl group or a substituted alkyl group, and a carboxyl group, an alkoxycarbonyl group, a substituted alkoxycarbonyl group, a phenoxy group may be substituted at a position other than the amino group. It may be substituted with a carbonyl group, a substituted phenoxycarbonyl group, a nitrile group, or the like.

Specific examples of such amine-based hydrogen donors include, for example, 4,4′-bis (dimethylamino) benzophenone, 4,4′-bis (diethylamino) benzophenone, 4-diethylaminoacetophenone, 4-dimethylaminopropio Examples include phenone, ethyl-4-dimethylaminobenzoate, 4-dimethylaminobenzoic acid, 4-dimethylaminobenzonitrile, and the like. 4,4′-bis (dimethylamino) benzophenone, 4,4′-bis (diethylamino) Benzophenone and the like are preferable, and 4,4′-bis (diethylamino) benzophenone is particularly preferable.
The amine hydrogen donor has a function as a sensitizer even in the case of a photopolymerization initiator other than a biimidazole compound.

  In the present invention, the hydrogen donor can be used alone or in admixture of two or more. However, one or more mercaptan hydrogen donors and one or more amine hydrogen donors are used in combination. It is preferable that the formed pixels are difficult to drop off from the substrate during development, and that the pixels have high strength and sensitivity.

Specific examples of a preferred combination of a mercaptan hydrogen donor and an amine hydrogen donor include 2-mercaptobenzothiazole / 4,4′-bis (dimethylamino) benzophenone, 2-mercaptobenzothiazole / 4,4′-. Bis (diethylamino) benzophenone, 2-mercaptobenzoxazole / 4,4′-bis (dimethylamino) benzophenone, 2-mercaptobenzoxazole / 4,4′-bis (diethylamino) benzophenone and the like, and more preferable combinations Are 2-mercaptobenzothiazole / 4,4′-bis (diethylamino) benzophenone, 2-mercaptobenzoxazole / 4,4′-bis (diethylamino) benzophenone, and the particularly preferred combination is 2-mercaptoben Thiazole / 4,4'-bis (diethylamino) benzophenone.
The weight ratio of mercaptan hydrogen donor to amine hydrogen donor in the combination of mercaptan hydrogen donor and amine hydrogen donor is preferably 1: 1 to 1: 4, more preferably 1: 1 to 1. : 3.

Specific examples of the triazine compound include 2,4,6-tris (trichloromethyl) -s-triazine, 2-methyl-4,6-bis (trichloromethyl) -s-triazine, 2- [2 -(5-methylfuran-2-yl) ethenyl] -4,6-bis (trichloromethyl) -s-triazine, 2- [2- (furan-2-yl) ethenyl] -4,6-bis (trichloro Methyl) -s-triazine, 2- [2- (4-diethylamino-2-methylphenyl) ethenyl] -4,6-bis (trichloromethyl) -s-triazine, 2- [2- (3,4-dimethoxy) Phenyl) ethenyl] -4,6-bis (trichloromethyl) -s-triazine, 2- (4-methoxyphenyl) -4,6-bis (trichloromethyl) -s-triazine, 2- (4- Triazine compounds having a halomethyl group, such as cistyryl) -4,6-bis (trichloromethyl) -s-triazine, 2- (4-n-butoxyphenyl) -4,6-bis (trichloromethyl) -s-triazine Can be mentioned.
Of these triazine compounds, 2- [2- (3,4-dimethoxyphenyl) ethenyl] -4,6-bis (trichloromethyl) -s-triazine is particularly preferable.
The above triazine compounds can be used alone or in admixture of two or more.

Specific examples of the O-acyloxime compound include 9. H. A carbazole-based O-acyloxime polymerization initiator is preferable, for example, 1- [9-ethyl-6-benzoyl-9. H. -Carbazol-3-yl] -nonane-1,2-nonane-2-oxime-O-acetate, 1- [9-ethyl-6-benzoyl-9. H. -Carbazol-3-yl] -pentane-1,2-pentane-2-oxime-O-acetate, 1- [9-ethyl-6-benzoyl-9. H. -Carbazol-3-yl] -octane-1-one oxime-O-acetate, ethanone, 1- [9-ethyl-6- (2-methylbenzoyl) -9H-carbazol-3-yl]-, 1- (O -Acetyloxime), ethanone, 1- [9-ethyl-6- [2-methyl-4- (2,2-dimethyl-1,3-dioxolanyl) methoxybenzoyl] -9. H. -Carbazol-3-yl]-, 1- (O-acetyloxime), 1- [9-ethyl-6- (1,3,5-trimethylbenzoyl) -9. H. -Carbazol-3-yl] -ethane-1-one oxime-O-benzoate, 1- [9-butyl-6- (2-ethylbenzoyl) -9. H. -Carbazol-3-yl] -ethane-1-one oxime-O-benzoate, 1- [9-ethyl-6- (2-methyl-4-tetrahydropyranylmethoxybenzoyl) -9. H. -Carbazol-3-yl] -ethane-1-one oxime-O-acetate, 1- [9-ethyl-6- (2-methyl-4-tetrahydrofuranylmethoxybenzoyl) -9. H. -Carbazol-3-yl] -ethane-1-one oxime-O-acetate and the like. Of these, ethanone, 1- [9-ethyl-6- (2-methylbenzoyl) -9H-carbazol-3-yl]-, 1- (O-acetyloxime), ethanone, 1- [9-ethyl-6 -[2-Methyl-4- (2,2-dimethyl-1,3-dioxolanyl) methoxybenzoyl] -9. H. -Carbazol-3-yl]-, 1- (O-acetyloxime) is preferred.
The O-acyloxime compounds can be used alone or in admixture of two or more.

-Additive component-
The resin composition in the present invention can contain various additive components as necessary.

As the additive component, for example,
Vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris (2-methoxyethoxy) silane, N- (2-aminoethyl) -3-aminopropyl-methyl-dimethoxysilane, N- (2-aminoethyl) -3-amino Propyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropyl methyl dimethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, Adhesion promoters such as 3-chloropropyl-methyl-dimethoxysilane, 3-chloropropyltrimethoxysilane, 3-methacryloyloxypropyltrimethoxysilane, 3-mercaptopropyltrimethoxysilane;

Antioxidants such as 2,2-thiobis (4-methyl-6-tert-butylphenol), 2,6-di-tert-butylphenol;
UV absorbers such as 2- (3-t-butyl-5-methyl-2-hydroxyphenyl) -5-chlorobenzotriazole, alkoxybenzophenones;
Anti-agglomeration agents such as sodium polyacrylate;
Thermal radical generators such as 1,1′-azobis (cyclohexane-1-carbonitrile), 2-phenylazo-4-methoxy-2,4-dimethylvaleronitrile;
Examples thereof include inkjet discharge performance stabilizers such as methanol, ethanol, i-propanol, n-butanol, and glycerin.

Furthermore, the resin composition in the present invention can contain a thermal acid generator and an acid crosslinking agent.
The thermal acid generator is a component that generates an acid by heating, and examples thereof include onium salts such as sulfonium salts, benzothiazolium salts, ammonium salts, and phosphonium salts, and particularly sulfonium salts. And benzothiazolium salts are preferred.

Specific examples of the sulfonium salt include
4-acetophenyldimethylsulfonium hexafluoroantimonate, 4-acetoxyphenyldimethylsulfonium hexafluoroarsenate, 4-benzyloxycarbonyloxyphenyldimethylsulfonium hexafluoroantimonate, 4-benzoyloxyphenyldimethylsulfonium hexafluoroantimonate, 4- Dialkylsulfonium salts such as benzoyloxyphenyldimethylsulfonium hexafluoroarsenate, 3-chloro-4-acetoxyphenyldimethylsulfonium hexafluoroantimonate;

4-hydroxyphenylbenzylmethylsulfonium hexafluoroantimonate, 4-hydroxyphenylbenzylmethylsulfonium hexafluorophosphate, 4-acetoxyphenylbenzylmethylsulfonium hexafluoroantimonate, 4-methoxyphenylbenzylmethylsulfonium hexafluoroantimonate, 2-methyl Monobenzylsulfonium salts such as -4-hydroxyphenylbenzylmethylsulfonium hexafluoroantimonate and 3-chloro-4-hydroxyphenylbenzylmethylsulfonium hexafluoroarsenate;

4-hydroxyphenyldibenzylsulfonium hexafluoroantimonate, 4-hydroxyphenyldibenzylsulfonium hexafluorophosphate, 4-acetoxyphenyldibenzylsulfonium hexafluoroantimonate, 4-methoxyphenyldibenzylsulfonium hexafluoroantimonate, 3-chloro Dibenzylsulfonium salts such as -4-hydroxyphenyldibenzylsulfonium hexafluoroarsenate, 3-methyl-4-hydroxy-5-t-butylphenyldibenzylsulfonium hexafluoroantimonate;

4-hydroxyphenyl, 4-methoxybenzyl, methylsulfonium hexafluorophosphate, 4-hydroxyphenyl, 4-chlorobenzyl, methylsulfonium hexafluoroantimonate, 4-hydroxyphenyl, 4-nitrobenzyl, methylsulfonium hexafluoroantimonate, 4-hydroxyphenyl, 4-chlorobenzyl, methylsulfonium hexafluorophosphate, 3-methyl-4-hydroxyphenyl, 4-nitrobenzyl, methylsulfonium hexafluoroantimonate, 4-hydroxyphenyl, 3,5-dichlorobenzyl, methyl Sulfonium hexafluoroantimonate, 3-chloro-4-hydroxyphenyl, 2-chlorobenzyl, methylsulfonium hexafluoroantimonate DOO, and substituted benzyl sulfonium salts such as 4-hydroxyphenyl-benzyl-4-methoxybenzyl sulfonium hexafluoro phosphate.

  Specific examples of the benzothiazonium salt include 3-benzylbenzothiazolium hexafluoroantimonate, 3-benzylbenzothiazolium hexafluorophosphate, 3-benzylbenzothiazolium tetrafluoroborate, Such as 3- (4-methoxybenzyl) benzothiazolium hexafluoroantimonate, 3-benzyl-2-methylthiobenzothiazolium hexafluoroantimonate, 3-benzyl-5-chlorobenzothiazolium hexafluoroantimonate Benzylbenzothiazolium salts.

Of the sulfonium salts and benzothiazolium salts, 4-acetoxyphenyldimethylsulfonium hexafluoroarsenate, 4-hydroxyphenyl benzyl methylsulfonium hexafluoroantimonate, 4-acetoxyphenyl benzyl methylsulfonium hexafluoroantimonate 4-hydroxyphenyldibenzylsulfonium hexafluoroantimonate, 4-acetoxyphenyldibenzylsulfonium hexafluoroantimonate, 3-benzylbenzothiazolium hexafluoroantimonate, and the like are preferable. Commercial products of these compounds include Sun Aid SI-L85, SI-L110, SI-L145, SI-L150, SI-L160 (manufactured by Sanshin Chemical Industry Co., Ltd.).
The said thermal acid generator can be used individually or in mixture of 2 or more types.

The acid crosslinking agent is represented by the following formula —CH ₂ OR ^4.
(In the formula, R ⁴ represents a hydrogen atom or an alkyl group having 1 to 6, preferably 1 to 4 carbon atoms.)
Is preferably a compound having two or more monovalent organic groups (hereinafter referred to as “methylol (ether) group”) in one molecule, and more preferably the monovalent organic group is a nitrogen atom. Ie, a compound having an N-methylol group and / or an N-alkoxymethyl group. When the acid crosslinking agent has two or more methylol (ether) groups in one molecule, each methylol (ether) group may be the same as or different from each other.

In the case where the acid crosslinking agent has (C) the binder resin has a carboxyl group, the methylol (ether) group in the acid crosslinking agent is in the presence of an acid generated from the thermal acid generator, and (C) the carboxyl in the binder resin. It is a component that reacts with a group to form a crosslinked structure.
Examples of such acid crosslinking agents include alkoxymethylated melamines such as N, N, N, N, N, N-hexa (alkoxymethyl) melamine, and N, N, N, N-tetra (alkoxymethyl) glycol. Examples include alkoxymethylated glycolurils such as uril.

Examples of acid crosslinking agents other than the above include urea-formaldehyde resin, thiourea-formaldehyde resin, melamine-formaldehyde resin, guanamine-formaldehyde resin, benzoguanamine-formaldehyde resin, glycoluril-formaldehyde resin, polyvinylphenols, A compound having an ether group introduced therein can also be used.
These acid crosslinking agents can be used alone or in admixture of two or more.

  Of the acid crosslinking agents, alkoxymethylated melamines and alkoxymethylated glycolurils are preferable, and alkoxymethylated melamines are particularly preferable. In addition, it has an excellent balance of crosslinkability, heat resistance and solvent resistance, and a cured product having a low dielectric constant is obtained. Thus, alkoxymethylated melamines (α) and alkoxymethylated glycolurils (β) As the ratio [(α) / (β)], an acid crosslinking agent mixed preferably at a ratio of 5/95 to 95/5, more preferably 10/90 to 90/10 can be used particularly preferably.

-Preparation method of resin composition-
The method for preparing the resin composition of the present invention is not particularly limited, but the above-mentioned pigment dispersion, (B) component, (C) component and (D) component, and optionally (F) photopolymerization. It is preferable to prepare by further adding an initiator and an organic solvent and mixing them together with a conventional method.

Color filter The color filter of the present invention is characterized by having a pixel pattern formed by an inkjet method using the resin composition of the present invention.
The color filter of the present invention is extremely useful for color imaging tube elements, color sensors, etc., in addition to transmissive or reflective color liquid crystal display devices.

  The color filter of the present invention can be produced by using the resin composition of the present invention by a known ink jet method, for example, a method described in JP 2000-310706 A or the like.

Liquid crystal display device The liquid crystal display device of the present invention comprises the color filter of the present invention.
The liquid crystal display device of the present invention can have an appropriate structure. For example, the color filter is formed on a substrate different from the driving substrate on which the thin film transistor (TFT) is disposed, and the driving substrate and the substrate on which the color filter is formed face each other with a liquid crystal layer interposed therebetween. Furthermore, a substrate in which a color filter is formed on the surface of a driving substrate on which a thin film transistor (TFT) is disposed, and a substrate in which an ITO (indium oxide doped with tin) electrode is formed are a liquid crystal layer. It is also possible to adopt a structure that is opposed to each other. The latter structure has the advantage that the aperture ratio can be remarkably improved and a bright and high-definition liquid crystal display device can be obtained.

  Hereinafter, embodiments of the present invention will be described more specifically with reference to examples. However, the present invention is not limited to the following examples.

Preparation of Colorant The following pigment dispersions (R1), (R2), (G1), (G2), (G3), (B1), (B2), and (B3) were prepared as colorants.

Preparation Example 1
As a pigment, C.I. I. Pigment red 254 / C.I. I. Pigment red 177 / C.I. I. Pigment Yellow 139 = 13.5 parts by mass of a 50/35/15 (mass ratio) mixture, Adisper PB821 (manufactured by Ajinomoto Fine Techno Co., Ltd.) as a dispersant, 6.0 parts by mass, and 1,3-butylene glycol diacetate as an organic solvent 80.5 parts by mass were treated with a bead mill to prepare a pigment dispersion (R1). For the obtained pigment dispersion (R1), using an E-type viscometer (RE80L manufactured by Toki Sangyo Co., Ltd.), eight different rotation speeds (0.5, 1, 2, 2.5, 4, The yield was measured by measuring the viscosity at 5, 10, 20 rpm) and found to be 128 mPa.

Preparation Example 2
As a pigment, C.I. I. Pigment red 254 / C.I. I. Pigment red 177 / C.I. I. Pigment Yellow 150 = 50/35/15 (mass ratio) mixture 13.5 parts by mass, Solsperse 73500 (manufactured by Lubrizol Co., Ltd.) as a dispersant, and 1,3-butylene glycol di as an organic solvent A pigment dispersion (R2) was prepared by treating 80.5 parts by mass of acetate with a bead mill. When the yield value of the pigment dispersion (R2) was determined in the same manner as in Preparation Example 1, it was 161 mPa.

Preparation Example 3
As a pigment, C.I. I. Pigment green 36 / C.I. I. Pigment Yellow 150 = 50/50 (mass ratio) mixture 15.0 parts by mass, Addispar PB821 (manufactured by Ajinomoto Fine Techno Co., Ltd.) 6.0 parts by mass and 1,3-butylene glycol diacetate 79. 0 part by mass was treated with a bead mill to prepare a pigment dispersion (G1). When the yield value of the pigment dispersion (G1) was determined in the same manner as in Preparation Example 1, it was 86 mPa.

Preparation Example 4
As a pigment, C.I. I. Pigment green 36 / C.I. I. Pigment Yellow 150 = 50/50 (mass ratio) mixture 15.0 parts by mass, Solsperse 56000 (manufactured by Lubrizol Co., Ltd.) as a dispersant, and 1,3-butylene glycol diacetate 79 as an organic solvent A pigment dispersion (G2) was prepared by treating 0.0 part by mass with a bead mill. When the yield value of the pigment dispersion (G2) was determined in the same manner as in Preparation Example 1, it was 118 mPa.

Preparation Example 5
As a pigment, C.I. I. Pigment green 36 / C.I. I. Pigment Yellow 150 = 50/50 (mass ratio) mixture 15.0 parts by mass, Disperbyk-2001 (manufactured by BYK) as a dispersant, 9.0 parts by mass, and 1,3-butylene glycol diacetate / A propylene glycol monomethyl ether acetate = 28.0 / 48.0 parts by mass was treated with a bead mill to prepare a pigment dispersion (G3). When the yield value of the pigment dispersion (G3) was determined in the same manner as in Preparation Example 1, it was 156 mPa.

Preparation Example 6
As a pigment, C.I. I. Blue 15: 6 / C. I. Pigment Violet = 90/10 (mass ratio) 12.0 parts by mass of the mixture, 6.0 parts by mass of Addisper PB821 (manufactured by Ajinomoto Fine Techno Co., Ltd.) as the dispersant and 82.0 of 1,3-butylene glycol diacetate as the organic solvent A pigment dispersion (B1) was prepared by treating parts by mass with a bead mill. When the yield value of the pigment dispersion (B1) was determined in the same manner as in Preparation Example 1, it was 143 mPa.

Preparation Example 7
As a pigment, C.I. I. Blue 15: 6 / C. I. Pigment Violet = 90/10 (mass ratio) 12.0 parts by mass of the mixture, Addispar PB821 (manufactured by Ajinomoto Fine Techno Co., Ltd.) as a dispersant, 6.0 parts by mass, and 1,3-butylene glycol diacetate / propylene as an organic solvent A pigment dispersion (B2) was prepared by treating glycol monomethyl ether acetate = 61.0 / 21.0 parts by mass with a bead mill. When the yield value of the pigment dispersion (B2) was determined in the same manner as in Preparation Example 1, it was 164 mPa.

Preparation Example 8
As a pigment, C.I. I. Blue 15: 6 / C. I. Pigment Violet = 90/10 (mass ratio) mixture 12.0 parts by mass, Addispar PB821 (manufactured by Ajinomoto Fine Techno Co., Ltd.) 2.5 parts by mass as a dispersant, and 1,3-butylene glycol diacetate 85.5 as an organic solvent A pigment dispersion (B3) was prepared by treating parts by mass with a bead mill. When the yield value of the pigment dispersion (B3) was determined in the same manner as in Preparation Example 1, it was 268 mPa.

Synthetic condenser tube of binder resin, flask equipped with stirrer was charged with 3 parts by weight of 2,2′-azobisisobutyronitrile and 200 parts by weight of diethylene glycol monoethyl ether acetate, followed by 10 parts by weight of methacrylic acid, N-phenyl maleimide 25 parts by weight, 15 parts by weight of styrene, diethylene glycol methyl ether methacrylate (manufactured by NOF Corporation, trade name: BLEMMER ^R PME-100) 40 parts by weight, alpha-methyl styrene as dicyclopentenyl acrylate 10 parts by weight and molecular weight regulator 5 parts by weight of dimer was charged and purged with nitrogen. Thereafter, the mixture was gently stirred to raise the temperature of the reaction solution to 80 ° C., and this temperature was maintained for 5 hours for polymerization to obtain a resin solution (solid content concentration = 31.2%). The obtained resin was Mw = 8,400 and Mn = 4,700. This resin solution is designated as “resin solution 1”.

Example 1
(A) 545 parts by weight of the pre-dispersion (R1) as the colorant, (C) 19 parts by weight (in terms of solid content) of the resin solution 1 as the binder resin, and (B) dipentaerythritol pentaacrylate as the polyfunctional monomer Monoesterified product with tosuccinic acid, dipentaerythritol hexaacrylate and a mixture of dipentaerythritol pentaacrylate (manufactured by Toagosei Co., Ltd., trade name: TO-1382) 78 parts by mass, as component (D), silicone-based interface 0.6 parts by mass of activator FZ-2122 (manufactured by Dow Corning Toray) and (E) 310 parts by mass of 1,3-butylene glycol diacetate as an organic solvent are mixed to obtain a resin composition (IJ-1 ) Was prepared. The composition is shown in Table 1.

  Next, the obtained resin composition was evaluated in the following manner. The evaluation results are shown in Table 2.

Evaluation of Viscosity The viscosity (25 ° C.) of the resin composition was measured using an ELD viscometer manufactured by Tokyo Keiki Co., Ltd.

Evaluation of surface tension The surface tension of the resin composition was measured using a dynamometer (BYK-Gardner GmbH).

Evaluation of spreading property on glass surface Using an inkjet apparatus Nanoprinter-1500S (manufactured by Microjet Co., Ltd.), the resin composition and the nozzle head are maintained at 23 ° C., and the setting is 25 picoliters per ink drop. Then, one drop of the resin composition was discharged onto the glass substrate. Next, after vacuum drying at 0.2 Torr, pre-baking is performed on a hot plate at 90 ° C. for 5 minutes, and further post-baking is performed at 230 ° C. for 30 minutes in a clean oven to obtain a resin composition. Dried. The diameter of droplet spreading after drying was measured with an optical microscope ECLIPSE L200 (Nikon). As a result, the case where the diameter was 110 μm or more was rated as ◎, the case where it was 85 μm or more and less than 110 μm, the case where it was 75 μm or more and less than 85 μm, Δ, and the case where it was less than 75 μm, ×

Evaluation of pixel flatness Using a inkjet printer Nanoprinter-1500S (manufactured by Microjet Co., Ltd.), near the center of the pixel after drying in a pixel partitioned by a partition wall having a height of 2.0 μm, a length of 500 μm and a width of 150 μm The resin composition was discharged so that the film thickness was 2.0 μm. Using α-step IQ (manufactured by KLA Tencor), the film thickness at the center of the pixel was measured in the width direction. FIG. 1 is a view of a pixel as viewed from above, and the thickness of a portion indicated by a broken arrow is measured.
At this time, when A− (B + C) / 2 is less than 0.25 μm, where A is the maximum value of the film thickness, and B and C are the film thicknesses at both ends of the pixel, the value is 0.25 μm or more and less than 0.35 μm. The case was evaluated as ◯, the case of 0.35 μm or more and less than 0.45 μm was evaluated as Δ, and the case of 0.45 μm or more as x.

Evaluation of Ink Ejectability Using an inkjet device Nanoprinter-1500S (manufactured by Microjet Co., Ltd.), maintaining the resin composition and the nozzle head at 23 ° C. and setting the ink to 25 picoliters per drop of ink Sexuality was evaluated. After repeating the step of taking the interval of 60 s after discharging 20000 times of the resin composition, images of flying droplets are taken at a rate of 20 frames per second while discharging 20000 times of the resin composition, Images processed by the droplet image analysis system were observed. As a result, when no defective nozzle was observed in all 128 nozzle heads, ◎, when defective nozzles were observed in 1 to 5 nozzle heads, and bad nozzles in 6 to 10 nozzle heads. The case where it was observed was Δ, and the case where a defective nozzle was observed in 11 or more nozzle heads was rated as x. Here, the defective nozzle refers to a case where the nozzle is clogged and ink cannot be discharged, or a droplet does not fly with good linearity due to breakage or the like.

Examples 2 to 15 and Comparative Examples 1 to 7
Resin compositions (IJ-2) to (IJ-22) were prepared in the same manner as in Example 1, except that the types and amounts of the constituent components were changed as shown in Table 1. The respective compositions are shown in Table 1.
Subsequently, evaluation was performed in the same manner as in Example 1 except that the resin compositions (IJ-2) to (IJ-22) were used instead of the resin composition (IJ-1), respectively. The evaluation results of Examples 2 to 15 are shown in Table 2. The evaluation results of Comparative Examples 1 to 7 are shown in Table 3.

Each component in Table 1 is as follows.
Organic solvent 1,3-BGDA: 1,3-butylene glycol diacetate BCTAC: Diethylene glycol mono-n-butyl ether acetate DPMA: Dipropylene glycol monomethyl ether acetate PGMEA: Propylene glycol monomethyl ether acetate
Multifunctional monomer TO-1382: monoesterified product of dipentaerythritol pentaacrylate and succinic acid, mixture of dipentaerythritol hexaacrylate and dipentaerythritol pentaacrylate DPHA: dipentaerythritol hexaacrylate

Surfactant FZ-2122: Silicone surfactant (HLB = 0) manufactured by Toray Dow Corning
FZ-2110: Silicone surfactant (HLB = 0) manufactured by Toray Dow Corning
L-7001: Silicone surfactant manufactured by Toray Dow Corning (HLB = 5)
SH 8400: Silicone surfactant (HLB = 7) manufactured by Toray Dow Corning
FZ-2104: Silicone surfactant manufactured by Toray Dow Corning (HLB = 9)
FZ-7006: Silicone surfactant (HLB = 2) manufactured by Toray Dow Corning
FZ-2166: Silicone surfactant (HLB = 3) manufactured by Toray Dow Corning
L-7604: Toray Dow Corning silicone surfactant (HLB = 13)
F475: Fluorine-based surfactant FZ-77 manufactured by Dainippon Ink Co., Ltd. Silicone surfactant (HLB = 11) manufactured by Toray Dow Corning
SH 3746: Silicone surfactant (HLB = 12) manufactured by Toray Dow Corning

  From Tables 2 and 3, by adding a surfactant having a HLB value of 10 or less and a high boiling point solvent to the resin composition, a pixel having excellent spreadability on the glass surface, inkjet discharge property, and pixel flatness is formed. It can be seen that a resin composition used to form a color filter can be obtained by an inkjet method that can be used.

It is a figure which shows the evaluation location of pixel flatness. It is a figure which shows the cross section of a pixel.

Claims (6)

  (A) a colorant, (B) a polyfunctional monomer, (C) a binder resin, (D) a surfactant having an HLB value of 10 or less, and (E) an organic solvent, and (E) organic A resin composition used for forming a color filter by an ink jet method, wherein the solvent contains an organic solvent having a boiling point of more than 180 ° C. at 1 atm in a total organic solvent.   (D) The resin composition according to claim 1, wherein the surfactant having an HLB value of 10 or less is a silicone-based surfactant.   The resin composition according to claim 1 or 2, wherein the organic solvent having a boiling point of more than 180 ° C at 1 atm is an organic solvent having two acetate structures.   (A) The colorant is prepared in the form of a pigment dispersion by dispersing a mixture containing a pigment, an organic solvent and a dispersant, and the yield value of the pigment dispersion is 200 mPa or less. The resin composition according to any one of claims 1 to 3.   The color filter which has a pixel pattern formed by the inkjet system using the resin composition of any one of Claims 1-4.   A liquid crystal display device comprising the color filter according to claim 5.

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