JP2010085770A - Inkjet thermosetting resin composition for color filter, color filter, and liquid crystal display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inkjet thermosetting resin composition of color filters that can reduce the brightness drop at the heat curing and post-baking processes in the method for manufacturing inkjet color filter, and also provide a color filter and a liquid crystal display using this composition. <P>SOLUTION: This inkjet thermosetting resin composition for a color filter is made by blending (A) a multi-organic function epoxy compound, (B) a binder resin, (C) a hardener, (D) a curable transparent resin composition containing an acid producing agent, (E) a pigment, (F) a pigment dispersion agent, and (G) a pigment dispersion liquid containing a solvent. This color filter and liquid crystal display use the above (B) acid producing agent which is the diaryl iodonium salt expressed by formula (1). In the formula (1), R<SP>10</SP>and R<SP>12</SP>independently represent an alkyl group containing 1-6 carbon respectively, A represents anion, m and n respectively represent integers of 0-2, and m+n is 2 or smaller. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a thermosetting resin composition for inkjet color filters, a color filter, and a liquid crystal display device. More specifically, the present invention relates to a thermosetting resin composition for an ink jet color filter which is excellent in suppressing a decrease in luminance in a thermosetting process of a color filter and a post-baking process, and an ink jet system using the thermosetting resin composition. And a liquid crystal display device having the color filter.

  In recent years, with the development of personal computers, particularly portable personal computers, the demand for liquid crystal displays has increased. In recent years, the penetration rate of home-use liquid crystal televisions has been increasing, and the market for liquid crystal displays is expanding. Furthermore, liquid crystal displays that have become widespread in recent years tend to have larger screens, and this tendency is particularly strong for home-use liquid crystal televisions. In such a situation, it is desired to manufacture a liquid crystal display that has a lower cost and a higher quality with high productivity. In particular, in a color filter having a function of colorizing the liquid crystal display. However, such demands are increasing because of its high cost.

  As a general method for producing a color filter, a coating film made of a photocurable resist composition in which a pigment is dispersed is formed on a substrate having a light shielding portion formed in a pattern, and a photomask having a desired pattern shape is formed. A photolithography method is used in which a monochromatic colored layer is formed in a pattern by exposure and alkali development. Further, by repeating this process three times, R, G, and B pixels can be formed.

  However, in this color filter manufacturing method using the photolithography method, the pattern formation process is complicated, and the same process must be repeated three times in order to form pixels of three colors of R, G, and B. It is a problem that it is expensive because it does not become.

  As a method for reducing the cost of the color filter, a light-shielding portion was formed from the thermosetting colored resin composition from the viewpoint of high use efficiency of the colorant, no photomask / development process, shortening of the process, etc. An ink jet method (for example, see Patent Document 1) in which a colored layer is formed by being attached to a substrate and heated is considered promising, and has been rapidly developed in recent years.

  However, in recent years, demands for higher definition of liquid crystal display devices, power saving of backlights, and higher brightness have increased, and higher brightness and higher contrast of color filters have been demanded. In the above-described ink jet system, there is a problem that the brightness and contrast are greatly reduced by the thermosetting process or post-baking of the colored layer.

Japanese Patent Laid-Open No. 9-21910

  The present invention has been made under such circumstances, thermosetting step, thermosetting resin composition for ink-jet color filters that enables suppression of a decrease in luminance of the color filter during post-baking, and the thermosetting It is an object of the present invention to provide a color filter formed by an inkjet method using a conductive resin composition and a liquid crystal display device having the color filter.

As a result of intensive studies to achieve the above object, the present inventors have found that a curable transparent resin composition containing a polyfunctional epoxy compound, a binder resin, a curing agent and an acid generator, a pigment, and a pigment dispersant. , A thermosetting resin composition for inkjet color filters, which is formulated with a pigment dispersion containing a solvent, can be used to control the decrease in brightness of the color filter during the thermosetting process and post-baking. I found out that I could do it.
The present invention has been completed based on such findings.

That is, the present invention
(1) A curable transparent resin composition containing (A) a polyfunctional epoxy compound, (B) a binder resin, (C) a curing agent and (D) an acid generator, and (E) a pigment, (F) a pigment dispersion And (G) a pigment dispersion containing a solvent, and the (D) acid generator is a diaryl iodonium salt represented by the following formula (1), a thermosetting resin for inkjet color filters Composition.

（上記式（１）中、Ｒ¹⁰及びＲ¹²はそれぞれ独立に炭素数１〜６のアルキル基を表し、Ａはアニオンを表し、ｍ及びｎはそれぞれ独立に０〜２の整数であり、ｍ＋ｎは２以下である。）

(In the above formula (1), R ¹⁰ and R ¹² each independently represents an alkyl group having 1 to 6 carbon atoms, A represents an anion, m and n are each independently an integer of 0 to 2, m + n Is 2 or less.)

(2) The thermosetting resin composition for color filters according to (1), wherein the polyfunctional epoxy compound (A) is a bifunctional or higher functional epoxy compound.
(3) (E) The pigment is a red pigment; I. Pigment red 254, C.I. I. Pigment red 242 and C.I. I. The thermosetting resin composition for inkjet color filters according to (1) or (2), which is at least one selected from CI Pigment Red 177.
(4) (E) The pigment is a green pigment; I. Pigment green 36, C.I. I. The thermosetting resin composition for inkjet color filters according to (1) or (2), which is at least one selected from CI Pigment Green 58.
(5) The thermosetting resin composition for a color filter according to any one of (1) to (4), wherein the average particle diameter of the pigment (E) is 10 to 100 nm.
(6) A color filter provided with a colored layer formed using the thermosetting resin composition for a color filter according to any one of (1) to (5).
(7) A liquid crystal display device comprising the color filter according to (6).
Is to provide.

  According to the present invention, a thermosetting process of a color filter by an ink jet method, a thermosetting resin composition for an ink jet color filter excellent in suppressing a decrease in luminance during post-baking, and an ink jet using the thermosetting resin composition A color filter formed by the method and a liquid crystal display device having the color filter can be provided.

First, the thermosetting resin composition of the present invention will be described.
[Thermosetting resin composition for color filter]
The thermosetting resin composition for color filters of the present invention (hereinafter sometimes simply referred to as a thermosetting resin composition) includes (A) a polyfunctional epoxy compound, (B) a binder resin, and (C) a curing agent. And (D) a curable transparent resin composition containing an acid generator and (E) a pigment, (F) a pigment dispersion containing a pigment dispersant and (G) a solvent.

(A) Polyfunctional epoxy compound In the thermosetting resin composition for inkjet color filters of the present invention, the polyfunctional epoxy compound used as the component (A) is a bifunctional compound containing two or more epoxy groups in one molecule. There is no particular limitation as long as it is above, for example, bisphenol A type epoxy resin, bisphenol F type epoxy resin, brominated bisphenol A type epoxy resin, bisphenol S type epoxy resin, diphenyl ether type epoxy resin, hydroquinone type epoxy resin, naphthalene Type epoxy resin, biphenyl type epoxy resin, fluorene type epoxy resin, phenol novolac type epoxy resin, orthocresol novolac type epoxy resin, trishydroxyphenylmethane type epoxy resin, trifunctional type epoxy resin, tetraphenilo Ethane type epoxy resin, dicyclopentadiene phenol type epoxy resin, hydrogenated bisphenol A type epoxy resin, bisphenol A nucleated polyol type epoxy resin, polypropylene glycol type epoxy resin, glycidyl ester type epoxy resin, glycidyl amine type epoxy resin, glyoxal type Epoxy resin, alicyclic epoxy resin, heterocyclic epoxy resin, etc. can be used

(B) Binder resin In the thermosetting resin composition for inkjet color filters of the present invention, the binder resin used as the component (B) is preferably highly compatible with other components, and is carbon-carbon unsaturated. A polymer polymerized by using at least a monomer containing a bond and an epoxy group, and having two or more epoxy groups is preferable. The binder resin can be obtained by polymerizing an epoxy group-containing monomer alone or by copolymerizing an epoxy group-containing monomer and another monomer.

  Specific examples of the epoxy group-containing monomer include glycidyl methacrylate (GMA) and β-methyl glycidyl methacrylate. Among them, glycidyl methacrylate (hereinafter, GMA) is preferable from the viewpoint of availability.

  Specific examples of monomers that do not contain an epoxy group include methyl (meth) acrylate, ethyl (meth) acrylate, i-propyl (meth) acrylate, n-propyl (meth) acrylate, i-butyl (meth) acrylate, n- Butyl (meth) acrylate, t-butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, hexyl (meth) acrylate, octyl (meth) acrylate, lauryl (meth) acrylate, cyclohexyl (meth) acrylate, para-t- Examples include butylcyclohexyl (meth) acrylate, isobornyl (meth) acrylate, benzyl (meth) acrylate, dicyclopentenyl (meth) acrylate, and phenyl (meth) acrylate, and among them, methyl methacrylate Rate (MMA) and cyclohexyl methacrylate (CHMA) is preferred.

  The binder resin may be a random copolymer or a block copolymer.

  The weight average molecular weight of the binder resin is preferably 3,000 or more, particularly 4,000 or more, when expressed in terms of polystyrene-converted weight average molecular weight. This is because if the molecular weight of the binder resin is less than 3,000, physical properties such as coating film strength and solvent resistance required for the color filter may be insufficient. In addition, since the ink according to the present invention is used in an ink jet system, the weight average molecular weight of the binder resin is preferably 20,000 or less, more preferably 15,000 or less when expressed in terms of polystyrene-equivalent weight average molecular weight. It is particularly preferred. If the molecular weight is more than 20,000, the viscosity is likely to increase, the stability of the ejection amount when ejected from the ejection head and the straightness in the ejection direction may be degraded, and the stability of long-term storage is degraded. Because there is a fear.

  As the binder resin, it is particularly preferable to use a glycidyl methacrylate (GMA) / methyl methacrylate (MMA) copolymer having a polystyrene-reduced weight average molecular weight (Mw) in the above range. The GMA / MMA copolymer may contain other monomer components as long as the object of the present invention can be achieved.

(C) Curing agent In the thermosetting resin composition for inkjet color filters of the present invention, as the curing agent used as the component (D), for example, a polyvalent carboxylic acid anhydride or a polyvalent carboxylic acid is used. Specific examples of the polyvalent carboxylic acid anhydride include phthalic anhydride, itaconic anhydride, succinic anhydride, citraconic anhydride, dodecenyl succinic anhydride, tricarballylic anhydride, maleic anhydride, hexahydrophthalic anhydride, dimethyltetrahydro anhydride Aliphatic or alicyclic dicarboxylic anhydrides such as phthalic acid, hymic anhydride, and nadic anhydride; fats such as 1,2,3,4-butanetetracarboxylic dianhydride and cyclopentanetetracarboxylic dianhydride Aromatic polycarboxylic dianhydrides; aromatic polycarboxylic anhydrides such as pyromellitic anhydride, trimellitic anhydride, and benzophenone tetracarboxylic anhydride; ester groups such as ethylene glycol bistrimellitic acid and glycerin tristrimellitic acid Containing acid anhydrides, particularly preferably aromatic poly It may be mentioned carboxylic acid anhydrides. Moreover, the epoxy resin hardening | curing agent which consists of a commercially available carboxylic acid anhydride can also be used suitably.

  Specific examples of the polyvalent carboxylic acid used in the present invention include aliphatic polyvalent carboxylic acids such as succinic acid, glutaric acid, adipic acid, butanetetracarboxylic acid, maleic acid, and itaconic acid; hexahydrophthalic acid, Aliphatic polycarboxylic acids such as 1,2-cyclohexanedicarboxylic acid, 1,2,4-cyclohexanetricarboxylic acid, cyclopentanetetracarboxylic acid, and phthalic acid, isophthalic acid, terephthalic acid, pyromellitic acid, trimellitic acid, Aromatic polyvalent carboxylic acids such as 1,4,5,8-naphthalenetetracarboxylic acid and benzophenonetetracarboxylic acid can be mentioned, and aromatic polyvalent carboxylic acids can be mentioned preferably.

  These polyvalent carboxylic acid anhydrides and polyvalent carboxylic acids can be used singly or in combination of two or more. The compounding quantity of the hardening | curing agent used for this invention is the range of 1-100 weight part normally per 100 weight part of components (monomer and resin) containing an epoxy group, Preferably it is 5-50 weight part. If the blending amount of the curing agent is less than 1 part by weight, curing may be insufficient and a tough coating film may not be formed. Moreover, when the compounding quantity of a hardening | curing agent exceeds 100 weight part, while the adhesiveness with respect to the board | substrate of a coating film is inferior, a uniform and smooth coating film may be unable to be formed.

(D) Acid generator In the thermosetting resin composition of the present invention, the acid generator according to the present invention used as the component (D) is a diaryliodonium salt represented by the following formula (1).

（上記式（１）中、Ｒ¹⁰及びＲ¹²はそれぞれ独立に炭素数１〜６のアルキル基を表し、Ａはアニオンを表し、ｍ及びｎはそれぞれ独立に０〜２の整数であり、ｍ＋ｎは２以下である。）

(In the above formula (1), R ¹⁰ and R ¹² each independently represents an alkyl group having 1 to 6 carbon atoms, A represents an anion, m and n are each independently an integer of 0 to 2, m + n Is 2 or less.)

The alkyl group having 1 to 6 carbon atoms may be any of linear, branched, and cyclic (cycloalkyl group). Among them, a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, 2- A butyl group and an isobutyl group are preferable. Examples of the anion represented by A include hexafluorophosphoric acid (PF ₆ ⁻ ), hexafluoroantimonic acid (SbF ₆ ⁻ ), hexafluoroarsenic salt (AsF ₆ ⁻ ), tetrakis (pentafluorophenyl) boric acid, Examples include an anion that generates a strong acid such as trifluoromethanesulfonic acid, and an anion that generates a strong acid such as hexafluorophosphoric acid (PF ₆ ⁻ ) tetrakis (pentafluorophenyl) boric acid and a trifluoromethanesulfonic acid derivative is preferable.

  Examples of the iodonium salt represented by the above formula (1) include the following.

(E) Pigment In the thermosetting resin composition for an inkjet color filter of the present invention, the pigment used as the component (E) is a pigment that can produce a desired color when a colored layer of the color filter is formed. Well, not particularly limited, various organic or inorganic colorants may be used alone or in admixture of two or more.

<Type of pigment>
As the organic colorant, for example, dyes, organic pigments, natural pigments, and the like can be used. Specific examples of the organic pigment include compounds classified as pigments in the color index (CI; issued by The Society of Dyers and Colorists).

<Red pigment>
Examples of red pigments include C.I. I. Pigment Red 1-18, 21-23, 31, 32, 37, 38, 41, 48: 1 to 48: 5, 49, 49: 1 to 49: 3, 50: 1, 51: 1, 52: 1, 52: 2, 53, 53: 1, 57: 1, 58: 2, 58: 4, 60: 1, 63: 1, 63: 2, 64, 64: 1, 66-68, 81: 1, 81: 3, 83: 1, 88-90, 95, 111, 112, 114, 117, 119, 122, 123, 136, 144, 146-151, 164, 166, 168-172, 175-179, 181, 184, 185, 187, 188, 190, 192, 194, 200, 202, 204, 206-214, 216, 220-224, 226, 237-240, 242, 243, 245, 247, 247: 1, 248, 251 258, 26 Color index of red-based pigment such as ～262,264 mention may be made of those (C.I.) are numbered.

  In the present invention, red pigments include C.I. I. Pigment red 177, C.I. I. Pigment red 242 and C.I. I. Pigment Red 254 is preferred. Red pigments can be used alone or in admixture of two or more. I. Pigment red 177, C.I. I. Pigment red 242 and C.I. I. It is preferably at least one selected from CI Pigment Red 254. Moreover, you may combine with the pigment of another color.

  As a pigment combined with a red pigment, a yellow pigment is preferable from the viewpoint of adjusting chromaticity. Examples of yellow pigments include C.I. I. Pigment yellow 1, C.I. I. Pigment yellow 3, C.I. I. Pigment yellow 12, C.I. I. Pigment yellow 138, C.I. I. Pigment yellow 139, C.I. I. Pigment yellow 150, C.I. I. Pigment yellow 180, C.I. I. And CI Pigment Yellow 185. Among them, C.I. I. Pigment yellow 138, C.I. I. Preferably combined with CI Pigment Yellow 150

<Green pigment>
Examples of the green pigment include C.I. I. Pigment green 7, C.I. I. Pigment green 36, C.I. I. Examples include green pigments having a color index (CI) number such as CI Pigment Green 58.

  In the present invention, examples of the green pigment include C.I. I. Pigment green 36, C.I. I. The pigment green 58 is preferable because it has a high luminance while achieving a specific color necessary for the green pixel of the color filter. The green pigments may be used alone or in combination of two or more, and may be combined with pigments of other colors.

  As a pigment combined with a green pigment, a yellow pigment is preferable from the viewpoint of adjusting chromaticity. Examples of yellow pigments include C.I. I. Pigment yellow 1, C.I. I. Pigment yellow 3, C.I. I. Pigment yellow 12, C.I. I. Pigment yellow 138, C.I. I. Pigment yellow 139, C.I. I. Pigment yellow 150, C.I. I. Pigment yellow 180, C.I. I. And CI Pigment Yellow 185. Among them, C.I. I. Pigment yellow 138, C.I. I. Preferably combined with CI Pigment Yellow 150

<Particle particle size>
The average particle diameter of the pigment used in the present invention is not particularly limited as long as it can produce a desired color when it is used as a colored layer of a color filter, and varies depending on the type of pigment used. It is preferably in the range of ˜100 nm, and more preferably in the range of 10 to 50 nm. When the average particle diameter of the pigment is within the above range, the liquid crystal display device manufactured using the thermosetting resin composition for inkjet color filter of the present invention has high brightness, high contrast, and high quality. It can be produced at a lower cost. Further, conventionally, as the particle size of the pigment is reduced, the pigment particles in the coating film may be crystallized and deposited on the coating film surface at the time of post-baking. Since the thermosetting resin composition for inkjet color filters is excellent in curability, it is less likely to cause such a problem. Therefore, as the average particle diameter of the pigment is within the above range, the smaller the conventional particle size is, the more the characteristics of the thermosetting resin composition for inkjet color filter of the present invention can be exhibited.
The average particle diameter is a value measured by a laser scattering method. Specifically, the average particle diameter is measured by dispersing pigment particles in a solvent, capturing the scattered light obtained by irradiating the dispersion solvent with a laser beam, and calculating.

(F) Pigment dispersant In the thermosetting resin composition for inkjet color filters of the present invention, the thermosetting resin composition for inkjet color filters used as the component (F) is for dispersing pigments well. It is preferable to blend a pigment dispersant. Examples of the pigment dispersant that can be used include cationic, anionic, nonionic, amphoteric, and silicone surfactants. Further, a dispersion auxiliary resin such as a special acrylic polymer may be further used. The thermosetting resin composition for inkjet color filters of the present invention preferably contains a polyallylamine derivative as a pigment dispersant.

  The polyallylamine derivative is a phase for the solvent / resin in which the pigment is to be dispersed by reacting the amino group of the side chain of the polyallylamine with polyester, polyamide, or a co-condensate of polyester and polyamide (polyesteramide). It has a wide solubility range and excellent pigment dispersibility, and is represented by the following general formula (I).

（式中、ＸおよびＹは、それぞれ独立に水素、重合開始剤残基又は連鎖移動触媒残基のいずれかを、Ｒ¹は遊離のアミノ基、下記一般式（II）又は（III）で示される基を、ｎは２〜１，０００の整数を表す。但しｎ個のＲ¹中、少なくとも１個は一般式（III）で示される基を表す。

(Wherein X and Y are each independently hydrogen, a polymerization initiator residue or a chain transfer catalyst residue, R ¹ is a free amino group, represented by the following general formula (II) or (III) Wherein n represents an integer of 2 to 1,000, provided that at least one of n R ^{1 s} represents a group represented by formula (III).

式中、Ｒ¹²は遊離のカルボン酸を有するポリエステル、遊離のカルボン酸を有するポリアミド、または遊離のカルボン酸を有するポリエステルアミドのいずれからカルボキシル基を除いた残基を表す。

In the formula, R ¹² represents a residue obtained by removing a carboxyl group from any of a polyester having a free carboxylic acid, a polyamide having a free carboxylic acid, or a polyester amide having a free carboxylic acid.

  As commercial products of the pigment dispersant, Azisper PB21, PB822, PB880 (manufactured by Ajinomoto Fine Techno Co., Ltd.), Solsperse 24000GR, 24000SC, 32000, 33500 (manufactured by Nippon Lubrizol Co., Ltd.) and the like can be used.

  In addition to the above polyallylamine derivatives, (co) polymers of unsaturated carboxylic acid esters such as poly (meth) acrylic acid esters; (parts) of (co) polymers of unsaturated carboxylic acids such as poly (meth) acrylic acid ) Amine salts, (partial) ammonium salts and (partial) alkylamine salts; (co) polymers of hydroxyl group-containing unsaturated carboxylic acid esters such as hydroxyl group-containing poly (meth) acrylic acid esters and their modified products; polyurethanes; Unsaturated polyamides; polysiloxanes; long-chain polyaminoamide phosphates; amides obtained by the reaction of poly (lower alkyleneimines) with free carboxyl group-containing polyesters and their salts are non-aqueous (solvent-based) It is preferable because it is a dispersing agent that can utilize steric hindrance and acid-base adsorption effective for dispersion at the same time.

Among them, among (co) polymers of unsaturated carboxylic acid esters such as poly (meth) acrylic acid esters, dimethylaminoethyl (meth) acrylate or quaternary ammonium salts of dimethylaminoethyl (meth) acrylate Polymers containing repeating units derived from are preferred.
Examples of the polymer include methyl (meth) acrylate, n-butyl (meth) acrylate, benzyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, and γ-butyrolactone modified product of (meth) acrylic acid. Copolymers with other (meth) acrylic acid esters are preferably used. Among them, a copolymer containing a repeating unit derived from a quaternary ammonium salt of methyl (meth) acrylate and dimethylaminoethyl (meth) acrylate or dimethylaminoethyl (meth) acrylate is preferably used. A block copolymer containing methyl poly (meth) acrylate and dimethylaminoethyl polyblock (meth) acrylate or a quaternary ammonium salt thereof is preferably used.
Further, a block copolymer obtained by reacting a tertiary amine with a phosphate ester, a sulfonate ester, or a borate ester to form a quaternary ammonium is more preferably used.

(F) Solvent In the thermosetting resin composition for inkjet color filters of the present invention, the organic solvent used as the component (F) is ethylene glycol monobutyl ether acetate, diethylene glycol monobutyl ether acetate, diethylene glycol monoethyl ether acetate, One or more solvent components selected from the group consisting of diethylene glycol dibutyl ether, diethyl adipate, dibutyl oxalate, dimethyl malonate, diethyl malonate, dimethyl succinate, and diethyl succinate are added to the total amount of the solvent. 60% by weight or more.

Furthermore, the thermosetting resin composition for inkjet color filters according to the present invention may be used in combination with a secondary solvent in order to improve the shape of the colored layer in addition to the specific main solvent. For example, by combining an appropriate amount of solvent components having a boiling point of 130 ° C. or more and less than 180 ° C. as a secondary solvent, the drying speed at the time of forming the ink layer is moderately increased without causing rapid drying at the nozzle tip of the inkjet head, and the solute Can be suppressed. Therefore, after being ejected onto the substrate, it can be sufficiently leveled by being familiar with the surface of the substrate and then properly dried in a relatively short time by a suitable drying means. Therefore, when a thermosetting resin composition for an ink jet color filter using such a sub-solvent is used, a pattern with high uniformity in film thickness, in which a thick film portion hardly occurs at the end and surface unevenness is reduced. Can be obtained and dried efficiently. It is preferable that the solvent contains a solvent component having a boiling point of 130 ° C. or higher and lower than 180 ° C. as a secondary solvent in an amount of 5 to 40% by weight of the total amount of the solvent. The solvent component used as the auxiliary solvent may be used alone or in combination of two or more as long as it has the above boiling point.
Among them, the boiling point of each solvent component used as a sub-solvent is 140 ° C. to 180 ° C., particularly 140 ° C. to 175 ° C. It is preferable from the point that a good coating film with a small amount can be obtained.

Moreover, as said subsolvent, what is necessary is just a solvent which has the said boiling point, However, It is preferable to select and use the solvent excellent in compatibility with a main solvent suitably. Specific examples of the auxiliary solvent include ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monoisopropyl ether, ethylene glycol monobutyl ether, ethylene glycol dipropyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl. Polyhydric alcohol ethers such as ethers, propylene glycol monobutyl ether, diethylene glycol methyl ethyl ether, diethylene glycol dimethyl ether, glycol ethers such as dipropylene glycol dimethyl ether, and glycerin ethers such as glycerin 1,3-dimethyl ether; ethylene glycol monomethyl Ether acetate, ethylene glycol mono Glycol esters including glycol ether esters such as chill ether acetate, ethylene glycol monopropyl ether acetate, ethylene glycol monomethoxymethyl ether, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, and glycerin 1-monoacetate Polyhydric alcohol esters such as glycerin esters; carboxylic acids such as isovaleric acid, isobutyric acid, propionic acid, butyric acid; ethyl isovalerate, hexyl formate, amyl acetate, isoamyl acetate, cyclohexyl acetate, ethyl lactate, lactic acid Aliphatic esters such as methyl, isoamyl propionate, butyl propionate, butyl butyrate, tributyl citrate, dimethyl oxalate; Alkoxycarboxylates such as ethyl cypropionate; ketocarboxylates such as methyl acetoacetate; n-amyl alcohol, isoamyl alcohol, 2-ethylbutanol, glycidol, n-hexanol, 2-methylcyclohexanol, 4 Monohydric alcohols such as methyl-2-pentanol, 2-octanol, cyclohexanol, 2-heptanol, 3-heptanol, n-heptanol; diisoamyl ethers and ethers such as 1,8-cineol; Examples include ketones such as ethyl-n-butyl ketone, diisobutyl ketone, di-n-propyl ketone, methylcyclohexanone, methyl-n-hexyl ketone, acetylacetone and diacetone alcohol; alkanes such as nonane and decane. The

  Among them, ethers including polyhydric alcohol ethers such as glycol ethers and glycerin ethers, polyhydric alcohol esters such as glycol esters and glycerin esters, aliphatic esters, alkoxycarboxylic esters, ketocarboxylic acids It is preferable to use one or more selected from the group consisting of esters including esters. In the case of using esters and ethers as described above, there is an advantage that it is easy to maintain good ink stability even when a highly reactive resin is used for the binder component or the like. Also, when glycol ethers or glycol esters are used, the wettability with respect to the glass substrate is improved, and the ink layer formation region is easily spread to every corner, which is effective in preventing color loss of pixels. .

  Among these co-solvents, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monoisopropyl ether, ethylene glycol monobutyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, propylene glycol monobutyl ether, diethylene glycol methyl ethyl Ether, diethylene glycol dimethyl ether, dipropylene glycol dimethyl ether, glycerin 1,3-dimethyl ether, ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol monopropyl ether acetate, ethylene glycol monomethoxymethyl ether, propylene Glycol monomethyl ether acetate, methyl acetoacetate, hexyl formate, cyclohexyl acetate, ethyl lactate, isoamyl propionate, butyl propionate, butyl butyrate, tributyl citrate, dimethyl oxalate, ethyl 3-ethoxypropionate, diisoamyl ether, and 1 The solvent which is 1 or more types selected from the group which consists of 8-cineole is used suitably.

  In the thermosetting resin for inkjet color filters according to the present invention, the content of the sub-solvent is 5 to 30% by weight, more preferably 5 to 25% by weight, especially 8 to 20% by weight based on the total amount of the solvent. %, Without impairing the effect of the main solvent, it is excellent in straightness and stability when ejected from the head, and can be dried more efficiently. In addition, it is preferable because it is easy to form good pixels with reduced surface unevenness.

  An ink to be ejected is prepared by using such a solvent at a ratio of usually 40 to 95% by weight, more preferably 70 to 95% by weight, with respect to the total amount of the ink containing the solvent. If the amount of the solvent is too small, the viscosity of the ink is high and it becomes difficult to discharge from the inkjet head. Also, if there is too much solvent, the ink film deposited on the wettability change site will be broken before the ink deposit (ink deposition amount) for the predetermined wettability change site (ink layer formation site) is not sufficient. , It protrudes to the surrounding non-exposed areas and further spreads to the adjacent wettability changing part (ink layer forming part). In other words, the amount of ink that can be deposited without sticking out from the wettability change site (ink layer forming site) to which the ink is to be attached becomes insufficient, the film thickness after drying is too thin, The transmission density cannot be obtained.

(Optional additive)
In the thermosetting resin composition for inkjet color filters of the present invention, various additives such as a polymerization terminator, a chain transfer agent, a leveling agent, a plasticizer, as long as the object of the present invention is not impaired. Surfactants, antifoaming agents, silane coupling agents, ultraviolet absorbers, adhesion promoters and the like can be mentioned.
Among these, surfactants that can be used include, for example, polyoxyethylene lauryl ether, polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, polyoxyethylene octyl phenyl ether, polyoxyethylene nonyl phenyl ether, polyethylene Examples include glycol dilaurate, polyethylene glycol distearate, sorbitan fatty acid esters, fatty acid-modified polyesters, and tertiary amine-modified polyurethanes. In addition, a fluorosurfactant can also be used.
Furthermore, examples of the plasticizer include dibutyl phthalate, dioctyl phthalate, and tricresyl. Examples of the antifoaming agent and leveling agent include silicon-based, fluorine-based, and acrylic compounds.

(Preparation of thermosetting resin composition for inkjet color filter)
The method for preparing the thermosetting resin composition for inkjet color filters of the present invention includes (A) a polyfunctional epoxy compound, (B) a binder resin, (C) a curing agent, and (D) acid generation. Any method can be used as long as it can uniformly dissolve or disperse the agent, (E) pigment, (F) pigment dispersant, and various additive components used as desired in the (G) solvent. First, it can be prepared by mixing using a known mixing means.

As a preparation method of the thermosetting resin composition, for example, (1) After adding the above-mentioned pigment dispersant and pigment in a solvent and dispersing using a disperser, a pigment dispersion is prepared, A method of adding and mixing a polyfunctional epoxy compound, an acid generator, a binder resin, and various additive components used as desired. (2) In the solvent, the above pigment, pigment dispersant, A method of simultaneously adding and mixing a functional epoxy compound, an acid generator, a binder resin, a curing agent, and various additive components used as desired; and (3) the above pigment dispersant in a solvent, Examples thereof include a method in which a polyfunctional epoxy compound, a binder resin, an acid generator, a curing agent, and various additive components used as desired are added and mixed, and then a pigment is added thereto and mixed. .
Among these methods, the method (1) is preferable from the viewpoint that the aggregation of the pigment can be effectively prevented and the pigment can be uniformly dispersed. In this case, the content of the solvent in the pigment dispersion is preferably in the range of 60 to 90% by mass from the viewpoint of the dispersibility of the pigment, the pigment dispersion stability over time, the chromaticity of the color filter to be obtained, and the like.

  In the preparation of the pigment dispersion in the above method (1), as a disperser for performing the pigment dispersion treatment, a roll mill such as a two-roll or three-roll, a ball mill such as a ball mill or a vibration ball mill, a paint shaker, a continuous Examples thereof include a bead mill such as a disk type bead mill and a continuous annular type bead mill. As a preferable dispersion condition of the bead mill, the bead diameter to be used is preferably 0.03 to 2 mm, more preferably 0.1 to 1 mm. Moreover, it is preferable to filter with a membrane filter of about 5.0 to 0.2 μm after dispersion. Thereby, the pigment dispersion liquid excellent in the dispersibility of a pigment is obtained.

[Color filter]
The color filter of the present invention includes a colored layer formed using the thermosetting resin composition for an inkjet color filter of the present invention. As a specific configuration, a transparent substrate and a transparent substrate are provided on the transparent substrate. And at least a pixel (colored layer) formed by an inkjet method.

  FIG. 1 is a longitudinal sectional view showing an example (color filter 103) of a color filter according to the present invention. The color filter 103 is formed so as to cover the black matrix 6 formed in a predetermined pattern on the transparent substrate 5, pixels (7R, 7G, 7B) formed in a predetermined pattern on the black matrix, and the pixels. The protective film 8 is provided. A transparent electrode film 9 for driving liquid crystal is formed on the protective film 8. An alignment film 10 is formed on the innermost surface of the color filter 103, in this case on the transparent electrode.

  The columnar spacer 12 is a shape of a convex spacer, and is formed at a plurality of predetermined locations (four locations in FIG. 1) on the transparent electrode 9 in accordance with the region (non-display region) where the black matrix layer 6 is formed. ing. The columnar spacer 12 is formed on the transparent electrode 9, the pixel, or the protective film 8. In the color filter 102, columnar spacers are formed in a sea-island shape on the protective film 8 via the transparent electrode film 9, but the protective film 8 and the columnar spacer 12 are integrally formed and covered thereover. A transparent electrode film 9 may be formed. When the color filter does not include a black matrix layer, columnar spacers can be formed in regions where pixels are not formed.

(Transparent substrate)
The transparent substrate 5 is not particularly limited as long as it is conventionally used for a color filter, but is not transparent, for example, quartz glass, Pyrex (registered trademark) glass, synthetic quartz plate or the like. A transparent flexible material having flexibility such as a rigid material, a transparent resin film, or an optical resin plate can be used. Among these, Corning 7059 glass is a material having a small coefficient of thermal expansion, excellent dimensional stability and workability in high-temperature heat treatment, and is an alkali-free glass containing no alkali component in the active matrix. Suitable for color filters for color liquid crystal display devices. In the present invention, a transparent substrate is usually used, but a reflective substrate or a white colored substrate can also be used. Moreover, you may use the board | substrate which surface-treated for the purpose of alkali elution prevention, gas-barrier provision, and other purposes as needed.

(Black matrix layer)
The black matrix layer 6 is provided so as to surround the pixels 7R, 7G, and 7B and the outside of the pixel formation region in order to improve the contrast of the display image. The black matrix layer 6 may be a metal thin film such as chromium by sputtering, vacuum deposition, or the like. Alternatively, the black matrix layer 6 may be a resin layer in which light shielding particles such as carbon fine particles, metal oxides, inorganic pigments, and organic pigments are contained in a resin binder. In the case of a resin layer containing light-shielding particles, there are a method of patterning by development using a photosensitive resist and a method of patterning using an inkjet ink containing light-shielding particles. The black matrix layer 6 may be formed using the inkjet ink according to the present invention containing light-shielding particles.
The thickness of the black matrix layer is about 1000 to 2000 mm in the case of a metal thin film, and about 0.5 to 2.5 μm in the case of a light shielding resin layer.

(Protective film)
The protective film 8 is provided to flatten the surface of the color filter and to prevent the components contained in the pixels from eluting into the liquid crystal layer. The protective film 8 covers the black matrix layer 6 and the pixels by using a known negative photocurable transparent resin composition or thermosetting transparent resin composition by a method such as spin coater, roll coater, spraying, printing or the like. It can be formed by being applied to and cured by light or heat.
The thickness of the protective film 8 can be set in consideration of the light transmittance of the material used, the surface state of the color filter, and the like, and can be set, for example, in the range of 0.1 to 2.0 μm.

(spacer)
A plurality of convex spacers are provided in a non-display area on the substrate in order to maintain a cell gap when the color filter 103 is bonded to a liquid crystal driving side substrate such as a TFT array substrate. The shape and size of the convex spacer are not particularly limited as long as it can be selectively provided in a non-display region on the substrate and can maintain a predetermined cell gap over the entire substrate. When the columnar spacer 12 as shown in the figure is formed as the convex spacer, it has a certain height in the range of about 2 to 10 μm, and the protruding height (pattern thickness) is required for the liquid crystal layer. It can set suitably from thickness etc. Moreover, the thickness of the columnar spacer 12 can be appropriately set within a range of about 5 to 20 μm. Further, the formation density (density) of the columnar spacers 12 can be appropriately set in consideration of the thickness unevenness of the liquid crystal layer, the aperture ratio, the shape and material of the columnar spacers, for example, red, green and blue Necessary and sufficient spacer function is expressed at a ratio of one for each pixel. The shape of such a columnar spacer may be a columnar shape, and may be, for example, a columnar shape, a prismatic shape, a truncated cone shape, or the like.

The convex spacer is, for example, applied by applying a coating solution of the curable resin composition directly on the transparent substrate by a method such as spin coater, roll coater, spray, printing, or through another layer such as a transparent electrode. And dried to form a curable resin layer. The rotational speed of the spin coater may be set within a range of 500 to 1500 revolutions / minute, as in the case of forming the protective film. Usually, a photocurable ink-jet ink is preferably used as the ink-jet ink for forming the spacer. Next, the resin layer is exposed through a photomask for a convex spacer, and then a developer such as an alkaline liquid is used. Development is performed to form a predetermined convex pattern, and this convex pattern is heat-treated (post-baked) in a clean oven or the like as necessary to form a convex spacer.

  The convex spacer can be provided directly on the color filter or indirectly through another layer. For example, a transparent electrode such as ITO or a protective film may be formed on the color filter, and a convex spacer may be formed thereon, or a protective film and a transparent electrode may be formed in this order on the color filter, and the transparent electrode A convex spacer may be formed on the top.

(Transparent electrode)
The transparent electrode 9 can be formed using indium tin oxide (ITO), zinc oxide (ZnO), tin oxide (SnO), or an alloy thereof. The thickness of the transparent electrode can be about 20 to 500 nm, preferably about 100 to 300 nm.

(Other layers)
Other members that are usually formed in the color filter may be further included. For example, when a color filter is formed using an inkjet method, there may be a partition between pixels. The partition for the inkjet method will be described in the manufacturing method by the inkjet method described later. In addition, the alignment film and other members can be formed by a usual method using those usually used for color filters.

The color filter of the present invention includes a step of selectively depositing the color filter inkjet ink according to the present invention on a predetermined region on a substrate by an inkjet method to form a colored layer, and curing the colored layer to form a pixel. Can be manufactured through the process of forming.
A manufacturing method of a color filter using an inkjet method can realize cost reduction and yield improvement, and is a manufacturing method with high productivity.

An example of the color filter manufacturing method according to the present invention will be described with reference to FIG.
First, a transparent substrate for a color filter is prepared as shown in FIG.
Next, as shown in FIG. 2B, a black matrix layer 6 is formed in a region serving as a boundary between pixel portions on one surface side of the transparent substrate 5. When a metal thin film is formed as the black matrix layer 6, it can be formed by patterning the thin film. As the patterning method, a normal patterning method such as a sputtering method or a vacuum deposition method can be used.
Moreover, when forming a layer containing light-shielding particles such as carbon fine particles, metal oxides, inorganic pigments, and organic pigments in a resin binder as the black matrix layer 6, a patterning method is a photolithography method. A generally used method such as a printing method can be used. Or you may form using an inkjet system similarly to the pixel mentioned later.

  Next, as shown in FIG. 2C, an ink-repellent partition wall 20 having a width smaller than that of the black matrix layer is formed in the center in the width direction of the pattern of the black matrix layer as necessary. The composition of such an ink repellent partition is not particularly limited as long as it is a resin composition having ink repellent properties. Moreover, it does not need to be transparent in particular and may be colored. For example, a material that is used for the black matrix layer and does not include a black material can be used. Specifically, a composition in which one or more aqueous resins such as polyacrylamide, polyvinyl alcohol, gelatin, casein, and cellulose are mixed, or an O / W emulsion type resin composition, for example, an emulsion of reactive silicon And the like. For reasons such as easy handling and curing, a photocurable resin is preferably used. Further, since the ink repellency partition wall is more preferable as the ink repellency is stronger, the surface thereof may be treated with an ink repellent treatment agent such as a silicon compound or a fluorine-containing compound.

  The patterning of the ink repellent partition wall can be performed by printing using a coating liquid of the ink repellent resin composition or photolithography using a photocurable coating liquid. As described above, the height of the ink repellent partition wall is preferably provided to prevent the ink from being mixed when coloring by the ink jet method as described above. Considering the overall flatness of the pixel, the thickness is preferably close to the thickness of the pixel. Specifically, although it varies depending on the amount of ink deposited, it is usually preferably in the range of 0.1 to 2.0 μm.

  Next, an inkjet ink for a color filter in which red (R), green (G) and blue (B) pigments are blended is prepared (at least one of the thermosetting resin composition for an inkjet color filter of the present invention). And). Then, as shown in FIG. 2D, the pixel forming ink jets corresponding to the respective color pixel forming regions 21R, 21G, and 21B defined by the pattern of the black matrix layer 6 on the surface of the transparent substrate 5. Ink is selectively deposited by an ink jet method to form a colored layer. The colored layer is formed so that a red pattern, a green pattern, and a blue pattern are arranged in a desired form such as a mosaic type, a stripe type, a triangle type, or a four-pixel arrangement type. In this ink spraying process, it is difficult for the ink-jet ink to increase in viscosity at the tip of the head 22 and to maintain good ejection properties. In this case, the ink of the corresponding color can be adhered accurately and uniformly in the predetermined pixel formation region, and a pixel portion without color unevenness or color loss can be formed with an accurate pattern. In addition, the inkjet ink for pixel formation of each color can be simultaneously sprayed onto the substrate using a plurality of heads, so the work efficiency is improved compared to the case where the pixel portion is formed for each color by a method such as printing. Can be made.

Next, as shown in FIG. 2E, the colored layers 23R, 23G, and 23B of the respective colors are dried and pre-baked as necessary, and then cured by appropriate exposure and / or heating. When the colored layer is appropriately exposed and / or heated, the crosslinking element of the curable resin contained in the inkjet ink causes a crosslinking reaction, and the colored layer is cured to form pixels.
Next, as shown in FIG. 2F, the color filter 104 is manufactured by forming the protective film 8 on the side of the transparent substrate on which the pixels 24R, 24G, and 24B are formed.
In addition, the protective film 8 can be formed by methods, such as a spin coater, a roll coater, a spray, printing, using a transparent resin composition. For example, it is preferably formed by applying a spin coater within a range of 500 to 1500 revolutions / minute and then curing by exposure and / or heating.

In addition, the transparent electrode on the protective film is made of indium tin oxide (ITO), zinc oxide (ZnO), tin oxide (SnO), etc., and alloys thereof, such as sputtering, vacuum deposition, CVD, etc. It is formed by a general method, and can be formed into a predetermined pattern by etching using a photoresist or using a jig as necessary.
In others, it can manufacture using the method similar to the method of forming a normal color filter.

[Liquid Crystal Display]
The display device of the present invention includes the color filter of the present invention. Specific examples of the display device include a liquid crystal display device. In the liquid crystal display device, a display side substrate and a liquid crystal driving side substrate are opposed to each other, and a liquid crystal is sealed between them, and the color filter of the present invention is used as the display side substrate.
Since the liquid crystal display device according to the present invention uses a highly reliable color filter as described above, the liquid crystal display device is naturally highly reliable.

When the color filter (display side substrate) of the present invention obtained as described above and the TFT array substrate (liquid crystal drive side substrate) are opposed to each other and the inner peripheral side edge portions of both the substrates are bonded with a sealant, both substrates are predetermined. They are pasted together while maintaining the distance cell gap. An active matrix color liquid crystal display device belonging to the liquid crystal display device according to the present invention is obtained by filling the gap between the substrates with a liquid crystal and sealing it.
Since other configurations and manufacturing methods in the liquid crystal display device can use commonly used configurations and methods, description thereof is omitted here.

  The liquid crystal display device of the present invention is not particularly limited as long as it has the above-described color filter, and may be a known liquid crystal display device. Specifically, IPS (In-Plane Switching) type, STN (Super Twisted Nematic) type, TN (Twisted Nematic) type, ferroelectric type, antiferroelectric type, MVA mode type and the like can be mentioned.

  EXAMPLES Next, although an Example demonstrates this invention further in detail, this invention is not limited at all by these examples.

(1) Preparation of pigment dispersion In accordance with Table 1, each pigment, pigment dispersant, solvent, and 60 parts by mass of 2.0 mm zirconia beads are placed in a mayonnaise bin, and pre-ground by a paint shaker (manufactured by Asada Tekko) Shake for 1 hour, then remove the zirconia beads, put 90 parts by weight of the zirconia beads having a particle size of 0.1 mm into the mayonnaise bin for the red pigment dispersion and 60 parts by weight for the green pigment dispersion. As the main pulverization, a pigment dispersion was prepared using a paint shaker for 15 hours for the red dispersion and 6 hours for the green dispersion.

(2) Preparation of curable transparent resin composition Multifunctional epoxy compound, binder resin, curing agent, acid generator, and solvent are mixed and dissolved in the blending amounts shown in Table 2 until uniform, and curable transparent. Resin compositions 1 and 2 were obtained.

(3) Preparation Examples 1 and 2 of Thermosetting Resin Composition for Inkjet Color Filter
A pressure filtration device having a red pigment dispersion, a transparent curable resin composition 1, a transparent curable resin composition 2, and a solvent shown in Table 3 mixed until uniform, and a mesh size of 0.2 μm. The thermosetting resin compositions 1 and 2 for an inkjet color filter (IJCF) were obtained by filtering with 1.

Comparative Examples 1 and 2
The green pigment dispersion, the transparent curable resin composition 1, the transparent curable resin composition 2, and the solvent shown in Table 4 are mixed until uniform, and further, by a pressure filtration device having a mesh size of 0.2 μm. By filtering, the thermosetting resin compositions 3 and 4 for inkjet color filters were obtained.

  As described above, for the thermosetting resin compositions for ink jet color filters obtained in Examples 1 and 2 and Comparative Examples 1 and 2, the evaluation substrate was prepared by the following method, the luminance was measured, and the luminance reduction amount was evaluated. went. Table 5 shows the evaluation results of the thermosetting resin composition for inkjet color filters.

<Evaluation substrate manufacturing method>
After applying the thermosetting resin composition for an inkjet color filter on a glass substrate of 0.7 mm thickness and 10 mm × 10 mm (“NA35” manufactured by NH Techno Glass Co., Ltd.) using a spin coater , And prebaked in an oven at 90 ° C. for 5 minutes. Thereafter, post-baking was performed for 5 minutes in an oven at 200 ° C., and then post-baking was performed for 40 minutes in a clean oven at 240 ° C. to form a color filter layer.

<Luminance reduction evaluation method>
The chromaticity coordinates (Y, x, y) of the substrate after pre-baking and after post-baking at 240 ° C. were measured using a microspectrophotometer OSP200 manufactured by Olympus Corporation in the substrate manufacturing step. The luminance after pre-baking was Y, the luminance after post-baking at 240 ° C. was Y ′, and the difference was evaluated as the luminance reduction amount ΔY (Y′−Y).

  As shown in Table 5, the use of the thermosetting resin composition for inkjet color filters of the present invention can suppress the decrease in luminance. For details, see P.I. R. Looking at Example 1 and Comparative Example 2 using H.254, the brightness reduction amount ΔY was reduced from 0.79 (Comparative Example 1) to 0.58 (Example 1) by the inkjet color filter thermosetting resin composition of the present invention. It turned out that it can suppress. P. G. When 58 was used, it was found that the luminance reduction amount ΔY was improved from −0.05 (Comparative Example 2) to +0.20 (Example 2).

  The thermosetting resin composition for ink-jet color filters of the present invention has properties such as enabling suppression of a decrease in luminance that occurs in a thermosetting process and a post-baking process, and has a color filter with good quality and the same. A liquid crystal display device can be provided.

It is a typical longitudinal cross-sectional view which shows an example of the color filter of this invention. It is a figure explaining an example of the method of manufacturing a color filter using the thermosetting resin composition for inkjet color filters of this invention.

Explanation of symbols

5 ... Transparent substrate 6 ... Black matrix layer 7R, 7G, 7B ... Pixel 8 ... Protective film 9 ... Transparent electrode film 10 ... Alignment film 12 ... Columnar spacer 103 ...・ Color filter

Claims (7)

(A) polyfunctional epoxy compound, (B) binder resin, (C) curing agent and (D) curable transparent resin composition containing acid generator, (E) pigment, (F) pigment dispersant and (G And a pigment dispersion containing a solvent, and the (D) acid generator is a diaryl iodonium salt represented by the following formula (1).

(In the above formula (1), R ¹⁰ and R ¹² each independently represents an alkyl group having 1 to 6 carbon atoms, A represents an anion, m and n are each independently an integer of 0 to 2, m + n Is 2 or less.) (A) The thermosetting resin composition for color filters according to claim 1, wherein the polyfunctional epoxy compound is a bifunctional or higher functional epoxy compound. (E) The pigment is a red pigment; I. Pigment red 254, C.I. I. Pigment red 242 and C.I. I. The thermosetting resin composition for inkjet color filters according to claim 1 or 2, wherein the thermosetting resin composition is at least one selected from CI Pigment Red 177. (E) The pigment is a green pigment; I. Pigment green 36, C.I. I. The thermosetting resin composition for ink-jet color filters according to claim 1, wherein the thermosetting resin composition is at least one selected from CI pigment green 58.   (E) The average particle diameter of a pigment is 10-100 nm, The thermosetting resin composition for color filters in any one of Claims 1-4.   The color filter provided with the colored layer formed using the thermosetting resin composition for color filters in any one of Claims 1-5.   A liquid crystal display device comprising the color filter according to claim 6.

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