JP2002341533A - Color composition and photosensitive color composition for color filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resist material for a color filter which can be formed into a thin film and has high light shielding property and sufficient sensitivity, resolution, developing property and durability. SOLUTION: An acrylic copolymer prepared by copolymerization of (a) amide group-containing ethylenically unsaturated monomers, (b) carboxyl group- containing ethylenically unsaturated monomers and (c) ethylenically unsaturated monomers except for the monomers (a) and (b) is used as a binder resin having amide groups and carboxyl groups so as to improve the dispersibility of pigments and to obtain a color filter black matrix having high sensitivity. Moreover, because the acrylic copolymer has excellent compatibility with an epoxyacrylate resin, an epoxy acrylate resin is further compounded in the composition, which results in higher sensitivity without decreasing the film strength.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photosensitive coloring composition for a color filter used in the production of an optical color filter used for a color television, a liquid crystal display device, a solid-state imaging device, a camera, etc. The present invention relates to a coloring composition, and further relates to a method for improving the photosensitivity of an existing composition by using the photosensitive coloring composition. More specifically, the present invention relates to a photosensitive coloring composition for a color filter suitable for producing a black matrix having high light-shielding properties, high sensitivity and excellent developability.

[0002]

2. Description of the Related Art Generally, a color filter forms a black matrix (black matrix) on the surface of a transparent substrate such as a glass or plastic sheet, and then forms red (R), green (G), and blue (B). And three or more different hues are sequentially formed in a color pattern such as a stripe shape or a mosaic shape. The pattern size varies depending on the use of the color filter and each color, but is 5-7
It is about 00 μm. The position accuracy of the superposition is several μm to several tens μm, and it is manufactured by a fine processing technique with high dimensional accuracy.

[0003] Typical production methods of color filters include a dyeing method, a printing method, a pigment dispersion method, and an electrodeposition method.
Among these, a pigment dispersion method of forming a color filter image by coating a photosensitive composition containing a color material on a transparent substrate and repeating image exposure, development, and curing as necessary is based on the position of a color filter pixel. It is widely used because it has high accuracy such as film thickness, excellent durability such as light resistance and heat resistance, and has few defects such as pinholes.

The black matrix is generally arranged in a lattice, stripe, or mosaic pattern between the R, G, and B color patterns, thereby improving the contrast by suppressing the color mixture between the colors or malfunctioning the TFT due to light leakage. Plays a role in preventing. For this reason, a high light-shielding property is required for the black matrix. Conventionally, a method of forming a black matrix with a metal film such as chromium has been generally used. In this method, a metal such as chromium is vapor-deposited on a transparent substrate and the chromium layer is etched through a photolithography process. Therefore, a high light-shielding property with a small thickness can be obtained with high accuracy. On the other hand, the method has a long manufacturing process and a low productivity, and has problems such as high cost and environmental problems due to waste liquid of the etching process.

For this reason, a method of forming a low-cost, pollution-free black matrix (resin black matrix) using a photosensitive resin in which a light-shielding pigment or dye is dispersed has been energetically studied. However, at present, the resin black matrix has not been put to practical use yet because of the problems described below. In order to achieve the same light-shielding property (optical density) as that of a black matrix made of a metal film such as chromium in the resin black matrix, it is necessary to increase the content of the light-shielding pigment or dye or increase the film thickness. is there.

[0006] In the method of increasing the film thickness, the flatness of the RGB colored pixels formed thereon is affected by the unevenness of the black matrix. For this reason, the liquid crystal cell gap becomes non-uniform, or the alignment of the liquid crystal is disturbed, thereby deteriorating the display capability. In addition, a problem such as disconnection of the transparent electrode ITO film provided on the color filter occurs.

Further, the method of increasing the content of the light-shielding pigment or dye has a problem that the sensitivity, developability, resolution, adhesion and the like of the photosensitive resin (black resist) are deteriorated, and the productivity is reduced. In addition to the reduction, the accuracy and reliability required for the color filter cannot be obtained. That is, a thin film,
Since a photosensitive material that can exhibit sensitivity, developability, resolution, and adhesion under high light-shielding conditions has not been realized, the practical use of a resin black matrix has been prevented.

Conventionally, in the case of a general photosensitive resin or a photosensitive resin having a constant light transmission such as a photosensitive coloring composition for a color filter, the performance such as sensitivity, developability, resolution and adhesion is improved. Various methods are known.
For example, Japanese Patent Application Laid-Open Nos. 1-152449 and 1-2
JP-A-54918, JP-A-2-153353 and JP-A-2-804 disclose a composition comprising a binder resin as a color filter coloring composition in which a pigment is dispersed, a polyfunctional acrylic monomer, and a triazine compound as an initiator. And JP-A-6-75372, 6-7
No. 5373 discloses an example in which the initiator is biimidazole in a similar composition.However, in the case of the compositions disclosed in these publications, polymerization is inhibited by oxygen when exposed to air, so that practical use is not possible. In order to obtain a high sensitivity, it is necessary to provide an oxygen barrier film such as polyvinyl alcohol,
There is a disadvantage that the manufacturing process is complicated.

As a method for reducing the above-mentioned disadvantage of inhibition of polymerization by oxygen, Japanese Patent Application Laid-Open No. 4-340965 proposes a photosensitive coloring composition containing a large amount of a polymerizable compound. However, the amount of the polymerizable compound is as large as 60% or more, and the amount of the coloring component is limited, so that it is difficult to apply the composition to a composition requiring a large amount of a coloring agent such as a resin black matrix. JP-A-6-27662, JP-B-3-27
Japanese Patent No. 36212 proposes a method for reducing polymerization inhibition by adding an amino acid derivative or a phosphorus compound, but this method is not practical because of insufficient improvement effects and problems such as odor and stability.

Methods for improving the resolution and developability include, for example, a binder resin having a side chain double bond exemplified in JP-A-5-19467, and JP-A-6-175.
No. 362, there is a binder resin having a controlled molecular weight distribution, blending of a polyfunctional thiol exemplified in JP-A-5-281734, addition of an organic carboxylic acid exemplified in JP-A-4-369533, and the like. These are all compositions intended to form RGB color pixel portions of a color filter, and the sensitivity, resolution, and developability when a light-shielding pigment such as carbon black is blended are unknown.

On the other hand, as a method for increasing the photosensitivity of a resin black matrix having a high light-shielding degree recently, Japanese Patent Application Laid-Open No. H11-84126 discloses a reactive binder resin having a carboxyl group-containing novolak epoxy acrylate as a binder resin. Although a photopolymerizable composition using a biimidazole compound and a polyfunctional thiol as a photopolymerization initiator has been proposed, the photocured coating has insufficient strength and is not practically usable.

Because of the seemingly contradictory problem of providing a highly sensitive photocuring property to a resin composition having a light-shielding property, which is essentially a performance inconsistent with photoreactivity, the realization of a practical resin black matrix is difficult. It was difficult.

[0013]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems and can easily form a thin film and a pattern having a high light-shielding property by a photolithography method.
It is an object to provide a resist material (photosensitive coloring composition) for a color filter having developability and durability.
Another object of the present invention is to provide a resist material for a color filter containing a black colorant, in particular, to enable a resin black matrix of the color filter to be manufactured with high precision and at low cost. Another object of the present invention is to improve the quality of a color filter and eliminate pollution by converting a black matrix into a resin.

Further, by using the resin composition of the present invention, a color filter having a practically usable resin black matrix is provided, and for that purpose, the dispersibility of the pigment in the coloring composition is improved. An object of the present invention is to provide a method for improving the photosensitivity of a photosensitive coloring composition for a filter.

[0015]

Means for Solving the Problems As a result of intensive studies, the present inventors have found that, as a binder resin (A) having an amide group and a carboxyl group, a) an amide group-containing ethylenically unsaturated monomer; The use of a group-containing ethylenically unsaturated monomer and c) an acrylic copolymer obtained by copolymerizing an ethylenically unsaturated monomer other than the above-mentioned a) and b) enables color sensitivity and high sensitivity. It has been found that a filter black matrix can be obtained. In addition, since the acrylic copolymer has excellent compatibility with an epoxy acrylate resin, (A ') an epoxy acrylate resin can be further added to the composition, and as a result, the film strength can be further reduced without decreasing the film strength. Was found. Further, the acrylic copolymer is excellent in dispersibility of carbon black as a coloring material, so that it has to be added to a coloring composition and has a feature that the amount of a dispersing agent that adversely affects the physical properties of a resist can be reduced.

The present invention is as follows.

[1] A coloring composition comprising (A) a binder resin having an amide group and a carboxyl group, and (B) a coloring material.

[2] The colored composition according to [1], which comprises (C) an organic solvent.

[3] The binder resin (A) having an amide group and a carboxyl group is an acrylic copolymer obtained by copolymerizing the following three components: [1] or [2] ] The coloring composition as described in [1]. a) 2 to 40% by weight of an ethylenically unsaturated monomer containing an amide group b) 2 to 40% by weight of an ethylenically unsaturated monomer containing a carboxyl group c) Ethylenically unsaturated monomer other than the above a) and b) Body 20-96% by weight

[4] The amide group-containing ethylenically unsaturated monomer a) is one or more compounds selected from N- (meth) acryloylmorpholine, N-vinylpyrrolidone and N-vinylcaprolactam. The colored composition according to any one of [1] to [3].

[5] The colored composition according to any one of [1] to [4], which comprises (A ') an epoxy (meth) acrylate resin as a second component of the binder resin.

[6] The colored composition according to [5], wherein the epoxy (meth) acrylate resin is a novolak type epoxy (meth) acrylate resin having a carboxyl group.

[7] The colored composition according to [6], wherein the epoxy (meth) acrylate resin is a cresol novolak type epoxy (meth) acrylate resin having a carboxyl group.

[8] The compounding ratio of the (A) binder resin having an amide group and a carboxyl group to the (A ′) epoxy (meth) acrylate resin is 30: 7 by weight.
0 to 90:10 [5] to [7]
The coloring composition according to any one of the above.

[9] The colored composition according to any one of [1] to [8], wherein the coloring material (B) is a black pigment.

[10] The colored composition according to [9], wherein the black pigment is carbon black.

[11] A photosensitive coloring composition for a color filter, comprising the coloring composition according to any one of [1] to [10].

[12] A photosensitive coloring composition for a color filter, comprising a component of the coloring composition according to any one of [1] to [10].

[13] The photosensitive coloring composition for a color filter according to [11] or [12], which further comprises (D) a photopolymerization initiator.

[14] The photosensitive coloring composition for a color filter according to [13], which comprises (E) an ethylenically unsaturated monomer.

[15] (D) the photopolymerization initiator is (a) a hexaarylbiimidazole compound, (b) a triazine compound, (c) an aminoacetophenone compound,
(D) a photopolymerization initiator containing at least one selected from the combination of a sensitizer and an organic boron salt-based compound represented by the following general formula (1) [13] or [ [14] The photosensitive coloring composition for a color filter according to [14].

Embedded image (Wherein, R ₁ , R ₂ , R ₃ , and R ₄ each independently represent an optionally substituted alkyl, aryl, aralkyl, alkenyl, alkynyl, silyl, heterocyclic group, or a halogen atom. , Z ⁺ represents any cation.)

[16] [13] to [1] characterized by containing (F) a polyfunctional thiol as a chain transfer agent.
5] The photosensitive coloring composition for a color filter according to any one of [1] to [5].

[17] The photosensitive coloring for a color filter according to [16], wherein the ratio of (F) the polyfunctional thiol to (D) the photopolymerization initiator is from 10: 1 to 1:10. Composition.

[18] The content of each component other than the organic solvent is as follows: [11] to [15]
The photosensitive coloring composition for a color filter according to any one of the above. Binder resin (A) alone or combination of (A) and (A ') 10 to 40% by weight Ethylenically unsaturated monomer (E) 5 to 20% by weight Coloring material (B) 25 to 60% by weight Photopolymerization Initiator (D) 2 to 25% by weight

[19] The content of each component other than the organic solvent is as follows: [16] or [1]
7] The photosensitive coloring composition for a color filter according to [1]. Binder resin (A) alone or combination of (A) and (A ') 10 to 40% by weight Ethylenically unsaturated monomer (E) 5 to 20% by weight Coloring material (B) 25 to 60% by weight Photopolymerization Initiator (D) 2 to 20% by weight Polyfunctional thiol (F) 2 to 20% by weight

[20] Exposure required for curing is 200 mJ
/ Cm ² or less, [11] to [1]
9] The photosensitive coloring composition for a color filter according to any one of [1] to [9].

[21] A color filter using the photosensitive coloring composition for a color filter according to any one of [11] to [20].

[22] [11] to [2] containing a black pigment
A color filter, wherein a black matrix is formed by using the photosensitive coloring composition for a color filter according to any one of 1) to 1).

[23] The color filter according to [22], wherein the black pigment is carbon black.

[24] A method for producing a color filter, comprising using the photosensitive coloring composition for a color filter according to any one of [11] to [20].

[25] [11] to [2] containing a black pigment
A method for forming a black matrix for a color filter, comprising using the photosensitive coloring composition for a color filter according to any one of [1] to [10].

[26] The method for forming a black matrix for a color filter according to [25], wherein the black pigment is carbon black.

[27] The binder resin having an amide group and a carboxyl group (A) according to any one of [1], [3] and [4] is used.
The method for improving the dispersibility of a coloring material in a coloring composition according to any one of [10].

[28] The method for improving dispersibility according to [27], wherein the coloring material is a black pigment.

[29] The method for improving dispersibility according to [28], wherein the black pigment is carbon black.

[30] The binder resin described in [1], [3] to [8] is used, [11] to [11].
The method for improving the photosensitivity of the photosensitive coloring composition for a color filter according to any one of [20].

[31] The method for improving the photosensitivity of a photosensitive coloring composition for a color filter according to [30], wherein the photosensitive coloring composition contains a black pigment.

[32] The method for improving the photosensitivity of a photosensitive coloring composition for a color filter according to [31], wherein the black pigment is carbon black.

[33] A method for producing a colored composition according to any one of [1] to [10].

[34] The method for producing a photosensitive coloring composition for a color filter according to any one of [11] to [20].

[0051]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. "Parts" and "%" representing quantitative ratios in the following description
Is based on weight unless otherwise specified.

(Definition of terms) In this specification, the term "(meth) acrylic acid" is used to mean both acrylic acid and methacrylic acid, and the term "(meth) acryloyl" is used for both acryloyl and methacryloyl. Used to mean

The coloring composition of the present invention is a composition in which a coloring material is dispersed at least in a binder resin, and may contain an organic solvent or a dispersant. Photosensitive coloring composition for color filter, the polymerization initiator and the concentration in the coloring composition,
It contains an organic solvent for viscosity adjustment and the like, and may contain an ethylenically unsaturated monomer.

The binder resin used in the present invention is required to have solubility in an aqueous alkali solution (alkali developability), and is therefore preferably a binder resin having a carboxyl group. Particularly, the film strength of the resist, heat resistance, and substrate adhesion A) an amide group-containing ethylenically unsaturated monomer, and b) a carboxyl group-containing ethylenically unsaturated monomer from the viewpoint that an excellent coating film having properties and the like can be obtained and the photosensitivity and carbon black dispersibility are excellent. And c) an acrylic copolymer obtained by copolymerizing an ethylenically unsaturated monomer other than a) and b) above.

The acrylic copolymer has high film strength,
Heat resistance is also obtained. Therefore, an acrylic copolymer obtained by copolymerizing a carboxyl group-containing ethylenically unsaturated monomer such as (meth) acrylic acid with an alkyl (meth) acrylate or the like is preferably used for a color filter resist. Was. The present inventors have further found that, by copolymerizing the amide group-containing ethylenically unsaturated monomer a), the dispersibility of a coloring material such as carbon black is improved, and at the same time the photosensitivity is increased. Specific examples of the amide group-containing ethylenically unsaturated monomer a) include (meth) acrylamide, N, N-dimethyl (meth) acrylamide,
N, N-diethyl (meth) acrylamide, N, N-di-n-butyl (meth) acrylamide, N, N-dimethylaminopropyl (meth) acrylamide, N-methyl (meth) acrylamide, N-ethyl (meth) Acrylamide, N-isopropyl (meth) acrylamide, N
-N-butyl (meth) acrylamide, N-tert-
Butyl (meth) acrylamide, N- (1,1′-dimethyl-2-phenyl) ethyl (meth) acrylamide,
N-methylol (meth) acrylamide, N-diphenylmethyl (meth) acrylamide, N-cyclohexyl (meth) acrylamide, N- (1-methylbutyl)
Examples thereof include (meth) acrylamide, diacetone (meth) acrylamide, N-vinylpyrrolidone, N-vinylcaprolactam, and N- (meth) acryloylmorpholine. The sensitivity to light irradiation or the coloring material (particularly black pigment, carbon black N-vinylpyrrolidone, N-vinylcaprolactam and N- (meth) acryloylmorpholine are particularly preferred in the photosensitive coloring composition of the present invention from the viewpoint of the dispersibility of (1).

The carboxyl group-containing ethylenically unsaturated monomer b) is used for imparting alkali developability to the acrylic copolymer. Specific examples of the carboxyl group-containing ethylenically unsaturated monomer include (meth) acrylic acid, 2
-(Meth) acryloyloxyethyl succinic acid, 2-
(Meth) acryloyloxyethyl phthalic acid, (meth)
Acryloyloxyethyl hexahydrophthalic acid, (meth) acrylic acid dimer, maleic acid, crotonic acid, itaconic acid, fumaric acid and the like are exemplified.

The ethylenically unsaturated monomers c) other than a) and b) are used for controlling the strength of the film and the dispersibility of the pigment. Specific examples thereof include styrene, α-
Methyl styrene, (o, m, p-) hydroxystyrene, vinyl compounds such as vinyl acetate, methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (Meth) acrylate, tert-butyl (meth) acrylate, n-hexyl (meth) acrylate, cyclohexyl (meth) acrylate, benzyl (meth) acrylate, phenoxyethyl (meth)
Acrylate, isobornyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, (meth)
Acrylonitrile, glycidyl (meth) acrylate,
Allyl glycidyl ether, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, N, N-dimethylaminoethyl (meth) acrylate, trifluoroethyl acrylate, 2,
(Meth) acrylates such as 2,3,3-tetrafluoropropyl (meth) acrylate and perfluorooctylethyl (meth) acrylate are exemplified.

The acrylic copolymer (A) having an amide group and a carboxyl group used in the coloring composition of the present invention can be prepared by subjecting the above a), b) and c) to radical copolymerization in an organic solvent by a known method. It can be obtained by polymerization,
These copolymer composition ratios are a) 2 to 40% by weight, b) 2 to
40% by weight, c) 20 to 96% by weight, preferably a) 4 to 30% by weight, b) 4 to 30% by weight, c) 40
-92% by weight, more preferably a) 6-25% by weight,
b) 6 to 25% by weight, c) 50 to 88% by weight.

Amide group-containing ethylenically unsaturated monomer a)
When the copolymerization ratio of the copolymer is less than 2% by weight, the photosensitivity and the dispersibility of the coloring material (especially black pigments and carbon black) are not improved. Can not do it. If the copolymerization ratio of the carboxyl group-containing ethylenically unsaturated monomer b) is less than 2% by weight, alkali developability is significantly reduced,
If it exceeds 40% by weight, the alkali developing rate is too high, and it cannot be practically used.

The preferred molecular weight of the acrylic copolymer described above is determined by gel permeation chromatography (GP).
The weight average molecular weight in terms of polystyrene according to C) is 1,0.
In the range of 0.00 to 500,000, preferably 3,0
00 to 200,000. If it is less than 1,000, the film strength will be significantly reduced. On the other hand, when it exceeds 500,000, the alkali developability is significantly reduced.

In the coloring composition of the present invention, an epoxy (meth) acrylate resin (A ') having a carboxyl group may be used in order to further increase the photosensitivity of the photosensitive coloring composition for a color filter using the same. it can. The epoxy (meth) acrylate resin having a carboxyl group can be obtained by adding an unsaturated monocarboxylic acid to the epoxy group of the epoxy resin and further reacting with a polybasic acid anhydride.

Examples of usable epoxy resins include bisphenol A epoxy resin, bisphenol F epoxy resin, bisphenol S epoxy resin, novolak epoxy resin, (o, m, p-) cresol novolak epoxy resin, phenol novolak epoxy resin, and naphthol. Modified novolak epoxy resin, halogenated phenol novolak epoxy resin, etc. are mentioned. From the viewpoint of photosensitivity, novolak epoxy resin, (o, m, p-) cresol novolak epoxy resin, phenol novolak epoxy resin, naphthol-modified novolak epoxy resin, An epoxy (meth) acrylate resin having a carboxylic acid group using a novolak type epoxy resin such as a halogenated phenol novolak epoxy resin as a raw material is preferable. Use is in particular in terms of compatibility with the acrylic copolymer (o, m, p-) cresol novolac epoxy resin is preferred. The preferred molecular weight of these epoxy resins is in the range of 300 to 100,000 as a weight average molecular weight measured by GPC. Molecular weight 300
If it is less than 100, the film strength is reduced, and if the resin exceeds 100,000, gelation is likely to occur during the addition reaction of the unsaturated monocarboxylic acid, and the production may be difficult.

The unsaturated monocarboxylic acids used in the synthesis of the epoxy (meth) acrylate resin include (meth) acrylic acid, 2- (meth) acryloyloxyethylsuccinic acid, 2- (meth) acryloyloxyethylphthalic acid, ( Examples thereof include (meth) acryloyloxyethyl hexahydrophthalic acid, (meth) acrylic acid dimer, itaconic acid, crotonic acid, and cinnamic acid. Of these, acrylic acid is particularly preferred because of its high reactivity.

The addition reaction of the unsaturated monocarboxylic acid to the epoxy resin can be carried out by a known method. For example, the reaction can be carried out at a temperature of 50 to 150 ° C. in the presence of an esterification catalyst. As the esterification catalyst, tertiary amines such as triethylamine, trimethylamine, benzyldimethylamine and benzyldiethylamine, and quaternary ammonium salts such as tetramethylammonium chloride, tetraethylammonium chloride and dodecyltrimethylammonium chloride can be used.

The addition amount of the unsaturated monocarboxylic acid is preferably in the range of 0.5 to 1.2 equivalents, more preferably 0.7 to 1.1 equivalents, per equivalent of the epoxy group of the epoxy resin. When the amount of the unsaturated monocarboxylic acid added deviates from the above range, the curing properties tend to be deteriorated.

Examples of the polybasic anhydride to be added to the epoxy resin to which the unsaturated carboxylic acid is added include maleic anhydride, succinic anhydride, itaconic anhydride, phthalic anhydride, tetrahydrophthalic anhydride, hexahydrophthalic anhydride,
Examples include pyromellitic anhydride, trimellitic anhydride, and benzophenonetetracarboxylic dianhydride. A known method can be used for the addition reaction of the polybasic acid anhydride, and it can be obtained by continuing the reaction under the same conditions as the addition reaction of the unsaturated monocarboxylic acid. The addition amount of the polybasic acid anhydride is such that the resin acid value is 10 to 150 mgKOH /
g, preferably 20 to 140 mgK.
OH / g is particularly preferred. If the acid value is less than 10 mgKOH / g, alkali developability will be poor.
If it exceeds mgKOH / g, the developing speed becomes too high,
Poor practicality.

The mixing ratio of the acrylic copolymer (A) having an amide group and a carboxyl group to the epoxy (meth) acrylate resin (A ') is determined by the weight ratio in view of the balance between film strength and photosensitivity. 30: 70-90: 1
0 is preferred. More preferably, 40:60 to 85: 1.
5 When the ratio of the acrylic copolymer is smaller than 30:70, the film strength decreases. On the other hand, if the compounding ratio of the epoxy (meth) acrylate resin is smaller than 90:10, the light sensitivity becomes insufficient.

The ethylenically unsaturated monomer (E) in the photosensitive color composition for a color filter of the present invention is a compound which is polymerized by a radical generated from a photopolymerization initiator upon irradiation with actinic rays. If the boiling point is low, the solvent volatilizes at the time of drying the solvent before exposure, the ratio of each component of the composition changes, and desired characteristics cannot be exhibited. Therefore, a compound having a boiling point of 150 ° C. or higher is preferable. Specific examples of such a compound include 4-tert-butylcyclohexyl (meth) acrylate, dicyclopentanyl (meth) acrylate, dicyclopentenyl (meth) acrylate, dicyclopentanyloxyethyl (meth) acrylate, and dicyclopentane. Pentenyloxyethyl (meth) acrylate, isobornyl (meth) acrylate, ethoxydiethylene glycol (meth) acrylate, methoxytriethylene glycol (meth) acrylate, methoxydipropylene glycol (meth) acrylate, phenoxyethyl (meth) acrylate, phenoxydiethylene glycol (meth) ) Acrylate, tetrahydrofurfuryl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) Acrylate, 2-hydroxy-3-phenoxypropyl (meth)
Acrylate, N, N-dimethylaminoethyl (meth)
Acrylate, N, N-dimethylaminopropyl (meth) acrylamide, N- (meth) acryloylmorpholine, 2- (meth) acryloyloxyethylsuccinic acid, 2- (meth) acryloyloxyethylphthalic acid,
Compounds having one ethylenically unsaturated group in one molecule such as 2- (meth) acryloyloxyethyl acid phosphate, N-vinylpyrrolidone, N-vinylcaprolactam, etc., ethylene glycol di (meth) acrylate, triethylene glycol Di (meth) acrylate,
Neopentyl glycol di (meth) acrylate, 1,
6-hexanediol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, trimethylolethane tri (meth) acrylate, trimethylolpropane ethylene oxide modified tri (meth) acrylate, trimethylolpropane propylene oxide modified tri (meth) Acrylate, pentaerythritol di (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meta) ) Compounds having two or more ethylenically unsaturated groups in one molecule such as acrylate and glycerol di (meth) acrylate It is. These ethylenically unsaturated monomers may be used alone or in combination of two or more.

In the present invention, an organic or inorganic pigment or dye such as yellow, red, blue and green can be optionally used as the coloring material (B). In particular, since the photosensitive coloring composition of the present invention has a very high sensitivity, a black pigment, which has the highest light-shielding property and therefore usually has the lowest photosensitivity, can be suitably used. Therefore, the photosensitive coloring composition for a color filter of the present invention can be particularly suitably used for a black matrix resist of a color filter.

Specific examples of the black pigment include carbon black, acetylene black, lamp black, carbon nanotube, graphite, iron black, iron oxide black pigment, aniline black, cyanine black, titanium black and the like. Further, organic pigments of three colors of red, green and blue can be mixed and used as a black pigment. Among them, carbon black is particularly preferable from the viewpoint of light blocking ratio and image characteristics.

The carbon black used in the present invention is
Any commercially available one can be used. Here, the carbon black is a black or grayish black powder generated by incomplete combustion or thermal decomposition of an organic substance, and its main component is carbon. The microscopic state of the carbon black surface varies depending on the production method. Examples of the production method include a channel method, a furnace method, a thermal method, a lamp black method, an acetylene method, and the like. But it can be used without any problems.

The preferable particle size of the carbon black is in the range of 5 to 200 nm in consideration of dispersibility and resolution. If it is less than 5 nm, uniform dispersion becomes difficult, and if it exceeds 200 nm, the resolution decreases. More preferably, it is in the range of 10 to 100 nm.

Examples of the carbon black include the following carbon blacks.

Made by Degussa: Printex 95, Pri
ntex90, Printex85, Printex7
5, Printex55, Printex45, Pri
ntex40, Printex30, Printex
3. PrintexA, PrintexG, Speci
al Black550, Special Black
350, Special Black250, Spec
ial Black100, Special Black
k4, manufactured by Mitsubishi Chemical Corporation: MA7, MA8, MA11, MA
100, MA220, MA230, # 52, # 50, #
47, # 45, # 2700, # 2650, # 2200,
# 1000, # 990, # 900, manufactured by Cabot Corporation: M
onarch 460, Monarch 430, Mona
rch280, Monarch120, Monarch
800, Monarch4630, REGAL99, R
EGAL99R, REGAL415, REGAL415
R, REGAL250, REGAL250R, REGA
L330, BLACK PEARLS480, manufactured by Colombian Carbon: RAVE11, RAVEN1
5, RAVEN30, RAVEN35, RAVEN4
0, RAVEN410, RAVEN420, RAVEN
450, RAVEN500, RAVEN780, RAV
EN850, RAVE890H, RAVE100
0, RAVEN1020, RAVEN1040.

The above carbon black and black pigment may be used in combination with other black or colored inorganic or organic pigments. Other pigments have a lower light-shielding property or lower image characteristics than carbon black, so the mixing ratio is naturally limited. The black pigment of the present application refers to a black pigment alone or a mixture of a black pigment and another black or colored inorganic or organic pigment.

Further, the coloring composition of the present invention and the photosensitive coloring composition for a color filter can be used for RGB resists other than the black matrix without any problem. In this case, the pigments usable are C.I. I. The number is, for example, C.I. I. Pigment Yellow 2
0, 24, 86, 93, 109, 110, 117, 12
5,137,138,147,148,153,15
4,166, C.I. I. Pigment Orange 36,4
3, 51, 55, 59, 61, C.I. I. Pigment Red 9,97,122,123,149,168,17
7,180,192,215,216,217,22
0,223,224,226,227,228,24
0, C.I. I. Pigment Violet 19, 23, 2
9, 30, 37, 40, 50, C.I. I. Pigment Blue 15,15: 1,15: 4,22,60,64,
C. I. Pigment Green 7, C.I. I. Pigment Brown 23, 25, 26 and the like.

The photopolymerization initiator (D) in the present invention is a compound which is excited by an actinic ray to generate a radical and initiates the polymerization of an ethylenically unsaturated bond. As the photopolymerization initiator used in the photosensitive coloring composition for a color filter of the present invention, it is necessary to generate radicals under high light shielding, and therefore, those having high photosensitivity are used. Examples of such a photopolymerization initiator include (a) a hexaarylbiimidazole compound, (b) a triazine compound, (c) an aminoacetophenone compound, (d) a sensitizing dye, and an organic boron represented by the general formula (1). Combinations of salt compounds,
(E) titanocene compounds, (f) oxadiazole compounds and the like. Preferably, a combination of (a) a hexaarylbiimidazole-based compound, (b) a triazine-based compound, (c) an aminoacetophenone-based compound, (d) a sensitizing dye and an organic boron salt-based compound represented by the general formula (1) is used. is there.

Specific examples of hexaarylbiimidazole compounds include 2,2'-bis (o-chlorophenyl)
-4,4 ', 5,5'-Tetraphenyl-1,2'-biimidazole, 2,2'-bis (o-bromophenyl)
-4,4 ', 5,5'-Tetraphenyl-1,2'-biimidazole, 2,2'-bis (o-chlorophenyl)
-4,4 ', 5,5'-tetra (o, p-dichlorophenyl) -1,2'-biimidazole, 2,2'-bis (o, p-dichlorophenyl) -4,4', 5,5 '-
Tetra (o, p-dichlorophenyl) -1,2'-biimidazole, 2,2'-bis (o-chlorophenyl)-
4,4 ', 5,5'-tetra (m-methoxyphenyl)
-1,2′-biimidazole, 2,2′-bis (o-methylphenyl) -4,4 ′, 5,5′-tetraphenyl-1,2′-biimidazole and the like.

When a hexaarylbiimidazole compound is used, benzophenone, 2,4,6-trimethylbenzophenone, 4-phenylbenzophenone, 4,4'-bis (dimethylamino) benzophenone, Benzophenone-based compounds such as 4,4′-bis (diethylamino) benzophenone,
2,4-diethylthioxanthone, isopropylthioxanthone, 2,4-diisopropylthioxanthone,
-A thioxanthone-based compound such as chlorothioxanthone may be added as a sensitizer.

Specific examples of the triazine-based compound include 2,
4,6-tris (trichloromethyl) -s-triazine, 2,4,6-tris (tribromomethyl) -s-triazine, 2-propionyl-4,6-bis (trichloromethyl) -s-triazine, -Benzoyl-4,6
-Bis (trichloromethyl) -s-triazine, 2-
(4-chlorophenyl) -4,6-bis (trichloromethyl) -s-triazine, 2,4-bis (4-methoxyphenyl) -6-trichloromethyl-s-triazine,
2- (4-methoxyphenyl) -2,6-bis (trichloromethyl) -s-triazine, 2- (4-methoxystyryl) -4,6-bis (trichloromethyl) -s-triazine, 2- (4 -Chlorostyryl) -4,6-bis (trichloromethyl) -s-triazine, 2- (4-aminophenyl) -4,6-bis (trichloromethyl)-
s-triazine, 2,4-bis (3-chlorophenyl)
-6-trichloromethyl-s-triazine, 2- (4-
Aminostyryl) -4,6-bis (dichloromethyl)-
Examples include s-triazine and the like.

Specific examples of the aminoacetophenone compound include 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropan-1-one and 2-benzyl-2-dimethylamino-1- (4- Morpholinophenyl) -butanone-1 is exemplified.

In a photopolymerization initiator comprising a combination of a sensitizer and an organic boron salt compound represented by the general formula (1),
The quaternary organic boron salt compound is represented by the general formula (1).

Embedded image (Wherein, R ₁ , R ₂ , R ₃ , and R ₄ each independently represent an optionally substituted alkyl, aryl, aralkyl, alkenyl, alkynyl, silyl, heterocyclic group, or a halogen atom. , Z ⁺ represents any cation)

Although the quaternary organic boron salt compound alone can absorb ultraviolet rays and generate radicals, it can be used as a very sensitive photopolymerization initiator by combining with a sensitizer. Can be.

The quaternary organic boron salt compound of the present invention
And an arbitrary cation (Z ⁺ ). R ₁ , R ₂ , R ₃ and R ₄ in the general formula (1) each independently include an alkyl group, an aryl group, an aralkyl group, an alkenyl group, an alkynyl group, a silyl group and a heterocyclic group, and these are substituted. It may have a group. Specific examples of the substituent include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group,
sec-butyl, isobutyl, tert-butyl, n-octyl, n-dodecyl, cyclopentyl, cyclohexyl, phenyl, tolyl, xylyl, anisyl, biphenyl, naphthyl, benzyl, Phenethyl group, diphenylmethyl group, methoxy group, ethoxy group, n-propoxy group, isopropoxy group, n-butoxy group, sec-butoxy group, tert-
Butoxy, methylenedioxy, ethylenedioxy, phenoxy, naphthoxy, benzyloxy, methylthio, phenylthio, 2-furyl, 2-thienyl, 2-pyridyl, fluoro and the like. However, the present invention is not limited to these examples.

Specific examples of the quaternary organoboron anion in the general formula (1) include methyltriphenylborate,
n-butyl triphenyl borate, n-octyl triphenyl borate, n-dodecyl triphenyl borate,
sec-butyl triphenyl borate, tert-butyl triphenyl borate, benzyl triphenyl borate, n-butyl tri (p-anisyl) borate, n-octyl tri (p-anisyl) borate, n-dodecyl tri (p-anisyl) borate, n -Butyl tri (p-tolyl) borate, n-butyl tri (o-tolyl) borate, n-butyl tri (4-tert-butylphenyl)
Borate, n-butyl tri (4-fluoro-2-methylphenyl) borate, n-butyl tri (4-fluorophenyl) borate, n-butyl tri (1-naphthyl) borate, ethyl tri (1-naphthyl) borate, n-butyl tri [ 1- (4-methylnaphthyl)] borate, methyltri [1- (4-methylnaphthyl)] borate, triphenylsilyltriphenylborate, trimethylsilyltriphenylborate, tetra-n-butylborate, di-n-butyldiphenylborate , Tetrabenzyl borate, etc., and a compound having a structure in which R ₁ is an alkyl group and R ₂ , R ₃ and R ₄ are a naphthyl group has a good balance between stability and photoreactivity. Is preferred.

Specific examples of Z ⁺ in the general formula (1) include tetramethylammonium, tetraethylammonium, tetra-n-butylammonium, tetraoctylammonium, N-methylquinolinium, N-
Ethylquinolium, N-methylpyridinium, N-ethylpyridinium, tetramethylphosphonium, tetra-
Examples thereof include n-butylphosphonium, trimethylsulfonium, triphenylsulfonium, trimethylsulfoxonium, diphenyliodonium, di (4-tert-butylphenyl) iodonium, lithium cation, and sodium cation.

Any combination of an anion and Z ⁺ can be used in the present invention. However, the invention is not limited to these examples. Further, two or more quaternary boron salt compounds may be used in combination.

As the sensitizer used in combination with the quaternary organic boron compound, any sensitizer can be used as long as it can absorb light to decompose the quaternary organic boron salt-based compound. A compound selected from the group consisting of a thioxanthone compound, a quinone compound, and a cationic dye represented by the general formula (2) can be suitably used.

[0089] ^{D + · A - (2)} ( wherein, D ⁺ represents a cation having a maximum absorption wavelength in the wavelength range of 300 to 500 nm, A ^- represents an anion)

Specific examples of the benzophenone compound include benzophenone, 4-methylbenzophenone,
4,6-trimethylbenzophenone, benzoylbenzoic acid, 4-phenylbenzophenone, 3,3'-dimethyl-4-methoxybenzophenone, 4-benzoyl-4 '
-Methyldiphenyl sulfide, 4,4'-bis (dimethylamino) benzophenone, 4,4'-bis (diethylamino) benzophenone, (2-acryloyloxyethyl) (4-benzoylbenzyl) dimethylammonium bromide, 4- ( Examples thereof include 3-dimethylamino-2-hydroxypropoxy) -benzophenone methochloride monohydrate, (4-benzoylbenzyl) trimethylammonium chloride and the like.

Specific examples of the thioxanthone compound include thioxanthone, 2,4-diethylthioxanthone, isopropylthioxanthone, 2,4-diisopropylthioxanthone, 2-chlorothioxanthone,
Chloro-4-propoxythioxanthone, 2- (3-dimethylamino-2-hydroxypropoxy) -3,4-
Dimethyl-9H-thioxanthen-9-one metochloride and the like are exemplified.

Further, specific examples of the quinone compound include:
2-ethylanthraquinone, 9,10-phenanthrenequinone and the like.

D ⁺ in the cationic dye of the general formula (2) is a cation of a compound having a maximum absorption wavelength in a wavelength region of 300 to 500 nm. Here, preferred examples of D ⁺ include methine, polymethine, azamethine, and diazamethine compounds.

Specific examples of A ⁻ in the general formula (2) include halogen anions such as Cl ⁻ , Br ⁻ , and I ⁻ , benzenesulfonic acid anion, p-toluenesulfonic acid anion, methanesulfonic acid anion, and 1-naphthalene. Sulfonic acid anions such as sulfonic acid anions, borate anions such as tetraphenyl borate, tetraanisyl borate, n-butyl triphenyl borate, tetrabenzyl borate, tetrafluoro borate, ClO ₄ ⁻ , P
F ₆ ^-, SbF ₆ ^- include various anions such as ^- like BF _4. However, the invention is not limited to these examples. Here, the structure of the cationic dye is specifically shown in Table 1, but the present invention is not limited to these examples.

[0095]

[Table 1] Each of these sensitizers may be used alone, or two or more of them may be used in an optional ratio as needed.

As the titanocene-based compound, Japanese Patent Application Laid-Open No.
-152396, JP-A-61-151197, JP-A-63-10602, JP-A-63-41
484, JP-A-2-291, JP-A-3-1
JP-A-2403, JP-A-3-20293, JP-A-3-27393, JP-A-3-52050,
JP-A-4-221958, JP-A-4-21975
Titanocene compounds described in Japanese Patent Application Laid-Open Publication No. H10-15064 can be used. Specifically, dicyclopentadienyl-Ti-dichloride, dicyclopentadienyl-Ti-diphenyl, dicyclopentadienyl-Ti-bis (2,3
4,5,6-pentafluorophenyl), dicyclopentadienyl-Ti-bis (2,3,5,6-tetrafluorophenyl), dicyclopentadienyl-Ti-bis (2,4,6- Trifluorophenyl), dicyclopentadienyl-Ti-bis (2,6-difluorophenyl), dicyclopentadienyl-Ti-bis (2,4-
Difluorophenyl), bis (methylcyclopentadienyl) -Ti-bis (2,3,4,5,6-pentafluorophenyl), bis (methylcyclopentadienyl)
-Ti-bis (2,3,5,6-tetrafluorophenyl), bis (methylcyclopentadienyl) -Ti-bis (2,6-difluorophenyl) and the like.

Examples of the oxadiazole compound include:
2-phenyl-5-trichloromethyl-1,3,4, -oxadiazole having a halomethyl group, 2- (p-methylphenyl) -5-trichloromethyl-1,3,4,
-Oxadiazole, 2- (p-methoxyphenyl)-
5-trichloromethyl-1,3,4, -oxadiazole, 2-styryl-5-trichloromethyl-1,3,
4, -oxadiazole, 2- (p-methoxystyryl) -5-trichloromethyl-1,3,4-oxadiazole, 2- (p-butoxystyryl) -5-trichloromethyl-1,3, 4, -oxadiazole and the like.

Further, in the photosensitive coloring composition for a color filter of the present invention, a polyfunctional thiol as a chain transfer agent can be used as a part of the photopolymerization initiator system.
Addition of the polyfunctional thiol suppresses polymerization inhibition by oxygen, and can cause a uniform photocuring reaction even under high light shielding.

The polyfunctional thiol to be added is preferably a compound having two or more thiol groups.
For example, hexanedithiol, decanedithiol, butanediol bisthiopropionate, butanediol bisthioglycolate, ethylene glycol bisthioglycolate, ethylene glycol bisthiopropionate, trimethylolpropane tristhioglycolate,
Trimethylolpropane tristhiopropionate, pentaerythritol tetrakisthioglycolate, pentaerythritol tetrakisthiopropionate, tris (2-hydroxyethyl) isocyanurate trimercaptopropionate, 1,4-dimethylmercaptobenzene, 2,4, 6-trimercapto-s-triazine, 2- (N, N-dibutylamino) -4,6-dimercapto-s-triazine and the like can be mentioned. These polyfunctional thiols can be used alone or in combination of two or more.

A polyfunctional thiol and a photopolymerization initiator (a) a hexaarylbiimidazole compound;
The compounding ratio of a triazine compound, (c) an aminoacetophenone compound, (d) a combination of a sensitizer and an organic boron salt compound, (e) a titanocene compound, and (f) an oxadiazole compound is 10: 1 to 1: 1. 1:10 is preferred. If the compounding ratio is out of this range, sufficient light sensitivity cannot be obtained. More preferably, it is 5: 1 to 1: 5.

A photopolymerization initiator other than those described above can be optionally added to the photosensitive coloring composition of the present invention. Diethoxyacetophenone, 2
-Hydroxy-2-methyl-1-phenylpropane-1
Acetophenone compounds such as -one, 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropan-1-one, 1-hydroxycyclohexylphenylketone, 4-tert-butyl-trichloroacetophenone, benzyldimethylketal, Benzoin compounds such as benzoin ethyl ether and benzoin isopropyl ether, glyoxy ester compounds such as methylphenylglyoxylate, acylphosphine oxide compounds such as 2,4,6-trimethylbenzoyldiphenylphosphine oxide, bis (2,6 -Dimethoxybenzoyl) -2,4,4-trimethylpentylphosphine oxide, bis (2,6-dichlorobenzoyl)
Bisacylphosphine oxide compounds such as -phenylphosphine oxide, bis (2,6-dichlorobenzoyl) -2,5-dimethylphenylphosphine oxide and bis (2,4,6-trimethylbenzoyl) phenylphosphine oxide; be able to.

The photosensitive coloring composition for a color filter of the present invention may contain a hydrogen-donating compound. A hydrogen donor is a compound capable of donating hydrogen to an initiator excited by light and a radical generated from the initiator. Examples of the hydrogen donor include an aliphatic amine such as triethanolamine and methyldiethanolamine, and 2-dimethylaminoethylbenzoic acid. , Ethyl 4-dimethylaminobenzoate, 4
Aromatic amines such as isobutyl-dimethylaminobenzoate and 4,4-dimethylaminobenzophenone; and thiol compounds such as 2-mercaptobenzothiazole, 2-mercaptobenzoxazole and 2-mercaptobenzoxazole.

The preferred content of each component other than the organic solvent (C) in the photosensitive coloring composition for a color filter of the present invention is as follows. The content of the binder resin (A) having an amide group and a carboxyl group or a mixed binder resin of (A) and an epoxy (meth) acrylate resin (A ′) is preferably 10 to 40% by weight, more preferably 15 to 35% by weight. . If it is less than 10% by weight, the film strength will be reduced, and if it exceeds 40% by weight, sufficient optical density cannot be obtained. The amount of the ethylenically unsaturated monomer (E) is preferably 5 to 20% by weight, more preferably 8 to 18% by weight. If it is less than 5% by weight, sufficient light sensitivity cannot be obtained,
If it exceeds 20% by weight, sufficient optical density cannot be obtained.
The content of the coloring material (B) is preferably 25 to 60% by weight, and more preferably 30 to 55% by weight. If it is less than 25% by weight, a sufficient optical density cannot be obtained, and if it exceeds 60% by weight, the film strength decreases. Photopolymerization initiator (D) is 2
It is preferably from 25 to 25% by weight, more preferably from 5 to 20% by weight. If the amount is less than 2% by weight, sufficient light sensitivity cannot be obtained, and if the amount exceeds 25% by weight, the light sensitivity is too high, and conversely, the resolution decreases. When a polyfunctional thiol (F) is further added, the content of the photopolymerization initiator (D) is preferably 2 to 20% by weight, and more preferably 3 to 15% by weight. 2% by weight
If it is less than 20%, sufficient light sensitivity cannot be obtained, and if it exceeds 20% by weight, the light sensitivity is too high and the resolution is lowered. In that case, the preferable blending amount of the polyfunctional thiol (F) is 2 to 20% by weight, more preferably 3 to 15% by weight. 2% by weight
When the amount is less than the above, the effect of the polyfunctional thiol does not appear.

The composition of the present invention generally comprises a binder resin (A) having an amide group and a carboxyl group, or (A)
And a binder resin (A ') of an epoxy (meth) acrylate resin, an ethylenically unsaturated monomer (E), a photopolymerization initiator (D), a coloring material (B), and if necessary, a polyfunctional thiol (F ) Is used in a state of being dissolved in an organic solvent (C). Although there is no particular limitation on the solvent, for example, diisopropyl ether, ethyl isobutyl ether, ethers such as butyl ether, ethyl acetate, isopropyl acetate, butyl acetate (n, sec, tert), amyl acetate, ethyl 3-ethoxypropionate, Esters such as methyl 3-methoxypropionate, ethyl 3-methoxypropionate, propyl 3-methoxypropionate, butyl 3-methoxypropionate, methyl ethyl ketone, isobutyl ketone, diisopropyl ketone, ethyl amyl ketone, methyl butyl ketone, methyl hexyl Ketones such as ketone, methyl isoamyl ketone, methyl isobutyl ketone, cyclohexanone, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol Ethyl ether, ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, diethylene glycol monoethyl ether acetate, propylene glycol mono-t-butyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monomethyl ether acetate, propylene glycol mono Glycols such as ethyl ether acetate, dipropylene glycol monoethyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monomethyl ether acetate, dipropylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether, and tripropylene glycol methyl ether Kind, and the like.

The organic solvent is capable of dissolving or dispersing each component, and it is preferable to select an organic solvent having a boiling point in the range of 100 to 200 ° C. More preferably from 120 to
It has a boiling point of 170 ° C. These solvents can be used alone or as a mixture. The photosensitive coloring composition for a color filter of the present invention has a solid content of 5 to 50% by weight, preferably 10 to 50% by weight using these solvents.
It is desirable to prepare the solution so as to be in the range of 30% by weight.

In the present invention, in addition to these essential components, a pigment dispersant, an adhesion improver, a leveling agent, a development improver, an antioxidant, a thermal polymerization inhibitor and the like can be suitably added. In particular, in the present coloring composition, the coloring material is finely dispersed, and
Since stabilizing the dispersion state is important for quality stability, it is desirable to add a pigment dispersant in some cases.

The pigment dispersant has an affinity for both the pigment and the binder resin, and includes a surfactant such as nonionic, cationic or anionic, and a polymeric dispersant. Preferably, a polymer dispersant having a basic functional group such as a primary, secondary, or tertiary amino group, a nitrogen-containing heterocycle such as pyridine, pyrimidine, or pyrazine, or a functional group such as an amide group or a urethane group is advantageous. used. Next, a method for producing the coloring composition of the present invention will be described. In the present invention, the coloring material is preferably subjected to dispersion treatment in advance using a paint conditioner, a sand grinder, a ball mill, a three-roll mill, a stone mill, a jet mill, a homogenizer, or the like. Since the coloring material is finely divided by the dispersion treatment, the light shielding ability and the coating characteristics are improved in the case of a black matrix resist, and in the case of an RGB resist,
Clear color characteristics and improved applicability are achieved.

In the dispersion treatment, it is preferable to use a system in which a coloring material, a solvent and a pigment dispersant, or the above-mentioned binder resin (A) or a combination of (A) and (A ') are used in combination. In particular, it is preferable to use a polymer dispersant since the dispersion stability over time is excellent.

In the case of dispersing with a sand grinder, glass beads or zirconia beads having a diameter of 0.1 to several millimeters are preferably used. The dispersing conditions are usually such that the temperature is from 0 ° C. to 100 ° C., preferably from room temperature to 80 ° C. The dispersion time is appropriately adjusted because the appropriate time varies depending on the composition of the coloring composition (coloring material, solvent, dispersant, binder resin), the size of the sand grinder, and the like.

When the dispersion is carried out by a three-roll mill, the temperature is generally in the range of 0 ° C. to 60 ° C. When the frictional heat of the roll is large and exceeds 60 ° C., the inside of the roll is cooled with circulating water. The number of passes of the ink through a three-roll mill depends on conditions such as the linear velocity of the rolls, the pressure between the rolls, the viscosity of the material, and the like.

To produce the photosensitive color composition for a color filter of the present invention, the coloring composition obtained by the above dispersion treatment and, in addition, the above-mentioned components necessary as components of the photosensitive color composition for a color filter are added. And mix to form a uniform solution. In the manufacturing process, fine dust is often mixed with the photosensitive liquid, and thus the obtained photosensitive coloring composition for a color filter is desirably subjected to filtration treatment with a filter or the like. The photosensitive coloring composition for a color filter only needs to finally obtain the required composition, but the dispersion treatment with a liquid in which all the components to be mixed are mixed is highly reactive due to the heat generated at the time of dispersion. There is a possibility that the component may be denatured, and it is desirable to prepare the coloring composition as described above and then mix other necessary components.

Next, a method for producing a color filter using the photosensitive coloring composition for a color filter of the present invention will be described.

First, a color filter for a liquid crystal display element in which a resin black matrix, pixels, and a protective film are laminated in this order will be described as an example.

A photosensitive coloring composition for a black color filter is applied on a transparent substrate. Next, the solvent is dried in an oven or the like, and is exposed and developed to form a black matrix pattern, and then post-baked to complete the black matrix.

Here, the transparent substrate is not particularly limited, and inorganic glass such as quartz glass, borosilicate glass, lime soda glass having a silica-coated surface, polyester such as polyethylene terephthalate, polypropylene, polyethylene and the like. Polyolefin, etc.
A film or sheet of a thermosetting plastic such as a polycarbonate, a polymethyl methacrylate, a polysulfone thermoplastic, an epoxy resin, or a polyester resin is preferably used. Such a transparent substrate may be subjected in advance to corona discharge treatment, ozone treatment, thin film treatment of various polymers such as a silane coupling agent or a urethane polymer, etc., in order to improve physical properties such as surface adhesiveness. .

[0116] As a coating method, in addition to dip coating, a roll coater, a wire bar, a flow coater, a die coater, and spray coating, a spin coating method such as a spinner is suitably used.

For drying the solvent, the solvent is dried with a drying device such as a hot plate, an IR oven, or a convection oven. Preferred drying conditions are 40 to 150 ° C., and the drying time is 10 seconds to 60 minutes. Alternatively, the solvent may be dried in a vacuum state.

In the exposure method, a photomask is placed on the sample, and image exposure is performed through the photomask. Light sources used for exposure include, for example, lamp light sources such as xenon lamps, high-pressure mercury lamps, ultra-high-pressure mercury lamps, metal halide lamps, medium-pressure mercury lamps, low-pressure mercury lamps, and laser light sources such as argon ion lasers, YAG lasers, excimer lasers, and nitrogen lasers. Can be When only the wavelength of the specific irradiation light is used, an optical filter can be used.

The photosensitive coloring composition for a black color filter of the present invention has high sensitivity even at a high optical density.
It can be cured by irradiation with light energy of 00 mJ / cm ² or less. Here, the irradiation energy amount of the light is, for example, an ultraviolet integrated light meter UIT-15 manufactured by Ushio Inc.
0 (light receiving unit UVD-S365).

In the developing treatment, the resist is developed by a dip, shower, paddle method or the like using a developing solution. The developer is
There is no particular limitation on the solvent as long as it is a solvent capable of dissolving the unexposed resist film. For example, organic solvents such as acetone, methylene chloride, trichlene, and cyclohexanone can be used. However, many organic solvents have environmental pollution, harm to the human body, and danger of fire. Therefore, it is preferable to use an alkali developing solution having no such danger. Examples of such an alkaline developer include inorganic alkali agents such as sodium carbonate, potassium carbonate, sodium silicate, potassium silicate, sodium hydroxide, and potassium hydroxide, or diethanolamine, triethanolamine, and tetraalkylammonium hydroxide salts. And an aqueous solution containing an organic alkaline agent. If necessary, the alkali developer may contain a surfactant, a water-soluble organic solvent, a low-molecular compound having a hydroxyl group or a carboxyl group, or the like. In particular,
It is preferable to add a surfactant because many surfactants have an effect of improving developability, resolution, background contamination and the like.

For example, as a surfactant for a developing solution,
Examples thereof include an anionic surfactant having a sodium naphthalene sulfonate group and a sodium benzene sulfonate group, a nonionic surfactant having a polyalkyleneoxy group, and a cationic surfactant having a tetraalkylammonium group. The developing method is not particularly limited, but is usually 10 to 50 ° C., preferably 15 to 50 ° C.
It is carried out at a development temperature of up to 45 ° C. by a method such as immersion development, spray development, brush development, or ultrasonic development.

The post-baking is carried out using the same apparatus as for the solvent drying at a temperature of 150 to 300 ° C. for 1 to 120 minutes. The thickness of the black matrix thus obtained is 0.1 to 2 μm. , Preferably 0.1 to 1.5
μ, more preferably in the range of 0.1 to 1 μ. Further, in order to function as a black matrix, it is preferable that the optical density is 3 or more in the film thickness.

The black matrix pattern formed in this step has a gap of 20 to 200 μm between the black matrices.
An opening of about m is provided. Pixels are formed in this space in a later step.

Next, pixels of a plurality of colors are formed in the black matrix opening. Usually, the colors of each pixel are three colors of RGB, and the photosensitive composition is colored with the above-mentioned pigment or dye. First, the photosensitive coloring composition is applied on a transparent substrate on which a black matrix pattern is placed. Next, by drying the solvent in an oven or the like, a colored layer of the first color is formed on the entire surface of the black matrix. Normally, a color filter consists of pixels of multiple colors, so unnecessary parts are removed by photolithography,
A desired first color pixel pattern is formed. The pixel film thickness is about 0.5 to 3 μm. This is repeated for pixels of a required color to form pixels of a plurality of colors, and a color filter is manufactured. The apparatus and chemicals used in the process of forming each pixel are preferably the same as in the case of forming the black matrix, but of course they can be different.

Thereafter, a protective film is laminated if necessary.
Examples of the protective film include an acrylic resin, an epoxy resin, a silicone resin, and a polyimide resin, and are not particularly limited.

In addition, after a patterned pixel is formed on a transparent substrate in advance, a photosensitive coloring composition for a black color filter is applied, and exposure is performed from the transparent substrate side, and the pixel is used as a mask. There is a method of forming a black matrix between pixels, such as a so-called backside exposure method.

Finally, if necessary, lamination and patterning of the ITO transparent electrode can be performed by a general method.

By using the photosensitive coloring composition for a color filter of the present invention, it is possible to form a resin black matrix by making the film thickness, the content of the black pigment, the strength of the resin and the like practical. it can.

As a binder resin, an acrylic copolymer having an amide group and a carboxyl group, preferably N- (meth) acryloylmorpholine, N-vinylpyrrolidone or N-vinylcaprolactam as a monomer for introducing an amide group. By using the acrylic copolymer used, the dispersibility of the coloring material, particularly the black pigment such as carbon black, during the production of the coloring composition can be improved. That is, by using such an acrylic copolymer, the amount of the dispersant can be reduced to half or less as compared with the case of a binder resin that has been generally used until now.

As the binder resin, an acrylic copolymer having an amide group and a carboxyl group and an epoxy (meth) acrylate resin, preferably a novolak type epoxy (meth) acrylate resin having a carboxyl group, particularly preferably a cresol novolak type resin having a carboxyl group By using a binder resin in combination with an epoxy (meth) acrylate resin, the light of the photosensitive coloring composition for a color filter of the present invention, in particular, the photosensitive coloring composition for a color filter containing a black pigment such as carbon black as a coloring agent. It is possible to improve the sensitivity.
The light sensitivity can be improved several times to several tens times as compared with the case where the light sensitivity is used alone without being combined.

[0131]

EXAMPLES The present invention will be described below with reference to examples.
Of course, the present invention is not limited at all by these examples.

Synthesis of acrylic copolymer

(Synthesis Example 1) Dropping funnel, thermometer, cooling pipe,
Methacrylic acid (MA) in a four-necked flask equipped with a stirrer
12.0 parts by weight, methyl methacrylate (MMA)
5 parts by weight, n-butyl methacrylate (BMA)
0 parts by weight, N-acryloylmorpholine (ACMO)
7.5 parts by weight, 225.0 parts by weight of propylene glycol monomethyl ether acetate (PMA) were charged and 1
For four hours, the inside of the four-necked flask was replaced with nitrogen. After further heating to 90 ° C. in an oil bath, 12.0 parts by weight of MA, M
MA 13.5 parts by weight, BMA 42.0 parts by weight g, AC
MO 7.5 parts by weight, PMA 225.0 parts by weight, 2,
2'-azobisisobutyronitrile (AIBN) 3.2
A part by weight of the mixture was added dropwise over 1 hour. After polymerization for 3 hours, a mixed solution of 1.0 parts by weight of AIBN and 15.0 parts by weight of PMA was added, the temperature was further raised to 100 ° C., polymerization was performed for 1.5 hours, and the mixture was allowed to cool. The acrylic copolymer thus obtained was designated as AP-1. The solid content concentration of AP-1 was 23.3%, the acid value was 93 mgKOH / g, and the weight average molecular weight in terms of polystyrene measured by GPC was 25,
000.

(Synthesis Example 2) Dropping funnel, thermometer, cooling tube,
In a four-necked flask equipped with a stirrer, MA 12. 0 parts by weight, 14.0 parts by weight of MMA, 43.0 parts by weight of BMA, 6.0 parts by weight of N-vinylcaprolactam (VC),
225.0 parts by weight of PMA was charged and the inside of the four-necked flask was replaced with nitrogen for 1 hour. Further, after heating to 90 ° C. in an oil bath, 12.0 parts by weight of MA and 14.0 parts of MMA were added.
Parts by weight, 43.0 parts by weight of BMA, 6.0 parts by weight of VC,
A mixed solution of 225.0 parts by weight of PMA and 3.2 parts by weight of AIBN was added dropwise over 1 hour. After polymerization for 3 hours, a mixed solution of 1.0 parts by weight of AIBN and 15 parts by weight of PMA was added, the temperature was further raised to 100 ° C., polymerization was performed for 1.5 hours, and then the mixture was allowed to cool. The acrylic copolymer thus obtained was named AP-2. The solid concentration of AP-2 is 22.5.
%, The acid value was 92 mgKOH / g, and the weight average molecular weight in terms of polystyrene measured by GPC was 22,000.

(Comparative Synthesis Example 1) 12.0 parts by weight of MA, 14.0 parts by weight of MMA, 43.0 parts by weight of BMA, 4 parts by weight of BMA were placed in a four-necked flask equipped with a dropping funnel, a thermometer, a condenser, and a stirrer. -Hydroxyethyl acrylate (HEMA)
6.0 parts by weight and 225.0 parts by weight of PMA
For four hours, the inside of the four-necked flask was replaced with nitrogen. After further heating to 90 ° C. in an oil bath, 12.0 parts by weight of MA, M
MA 14.0 parts by weight, BMA 43.0 parts by weight, HEM
A 6.0 parts by weight, PMA 225.0 parts by weight, AIBN
3.2 parts by weight of the mixture was added dropwise over 1 hour. After polymerization for 3 hours, 1.0 parts by weight of AIBN and 1 part of PMA
5.0 parts by weight of the mixture was added, the temperature was further raised to 100 ° C., polymerization was carried out for 1.5 hours, and then the mixture was allowed to cool. The acrylic copolymer thus obtained was designated as Comparative AP-1. Comparative AP
-1 has a solid concentration of 22.1% and an acid value of 92 mg KOH
/ G, the weight average molecular weight in terms of polystyrene measured by GPC was 23,000.

Synthesis of epoxy acrylate resin

(Synthesis Example 3) Cresol novolak type epoxy resin (Epototo YDCN-704, manufactured by Toto Kasei Co., Ltd., epoxy equivalent 210, softening point 90 ° C.) 21
0 parts by weight, acrylic acid 72 parts by weight, hydroquinone 0.1 part by weight.
28 parts by weight and 232.6 parts by weight of diethylene glycol monoethyl ether acetate were charged and heated to 95 ° C. After confirming that the above mixture was uniformly dissolved, 1.4 parts by weight of triphenylphosphine was charged and heated to 100 ° C. And react for about 30 hours, acid value 0.5mgKOH / g
Reaction product was obtained. In addition, tetrahydrophthalic anhydride 6
6.9 parts by weight were charged, heated to 90 ° C., and reacted for about 6 hours. The disappearance of acid anhydride absorption was confirmed by IR, and an epoxy having a solid content of 70 mg KOH / g and a solid content of 60.0% was used. An acrylic acid resin EP-1 was obtained.

(Synthesis Example 4) Cresol novolak type epoxy resin (Epototo YDCN-704, manufactured by Toto Kasei Co., Ltd., epoxy equivalent 210, softening point 90 ° C.) 21
0 parts by weight, acrylic acid 72 parts by weight, hydroquinone 0.1 part by weight.
28 parts by weight and 232.6 parts by weight of diethylene glycol monoethyl ether acetate were charged and heated to 95 ° C. After confirming that the above mixture was uniformly dissolved, 1.4 parts by weight of triphenylphosphine was charged and heated to 100 ° C. And react for about 30 hours, acid value 0.5mgKOH / g
Reaction product was obtained. To this, 44 parts by weight of succinic anhydride was charged, heated to 90 ° C. and reacted for about 6 hours, and the disappearance of acid anhydride absorption was confirmed by IR. The solid content acid value was 70 mg KOH /
g, an epoxy acrylate resin EP-2 having a solid content of 58.5%.

Preparation of coloring composition

<Example 1> (Black coloring composition-1) AP-1 30.0 parts by weight (solid content: 7.0 parts by weight)
3.5 parts by weight of PMA, Floren DOPA-33 (Dispersant solid concentration: 30%, manufactured by Kyoeisha Chemical Co., Ltd.) 3.5
After mixing 7.0 parts by weight of Special Black 4 (Carbon Black, Degussa Co.), the mixture was allowed to stand overnight.
After stirring for an additional hour, a three-roll mill
It was passed through Kodaira Seisakusho's model RIII-1RM-2) four times. By adding cyclohexanone to the obtained black ink and adjusting the concentration, a black coloring composition-1 having a solid content concentration of 18.0% was obtained.

<Examples 2 to 9> Black, blue and red coloring compositions were prepared in the same manner with the composition shown in Table 2.

<Comparative Examples 1 to 3> Comparative black coloring compositions were prepared in the same manner with the composition shown in Table 2.

Evaluation of Pigment Dispersibility Pigment dispersibility of the obtained colored paste was measured using a pore diameter of 0.1%.
It was evaluated by checking the filterability when an 8 μm filter (Kiriyama filter paper for GFP) was used. When the dispersibility of the pigment is good, the filterability is good (decision 、), and when the dispersibility is bad, the pigment particles are aggregated, so that the filter is clogged and cannot be filtered (decision ×). By this method, Examples 1 to 9 and Comparative Examples 1 to 3 were evaluated. The results are shown in Table 2.

[0144] AP- using the binder resin of the present invention
1, the filterability of the coloring composition using AP-2 is good even if the concentration of the dispersant is low (black coloring composition-2, black coloring composition-4). However, in the coloring composition using Comparative AP-1, when the concentration of the dispersant was low, the filter was clogged and could not be filtered (Comparative black coloring composition-
3).

[0145]

[Table 2]

[Table 3]

Preparation of photosensitive coloring composition for color filter (for black matrix resist) A photosensitive coloring composition for a color filter having the composition shown in Examples 10 to 19 and Comparative Examples 4 and 5 in Table 3 was prepared. Pore size 0.
After filtration through an 8 μm filter (for Kiriyama filter paper for GFP), various evaluations were performed.

Evaluation of Photosensitivity The photosensitive coloring compositions for color filters of Examples 10 to 19 and Comparative Examples 4 to 5 shown in Table 3 were applied to a glass substrate (size 1).
(00 × 100 mm), dried at room temperature for 30 minutes, and prebaked at 70 ° C. for 20 minutes. Measure the thickness of the resist in advance using a film thickness meter (SU
RFCOM130A) and an exposure device (Ushio Inc.) incorporating an extra-high pressure mercury lamp.
It was photocured by changing the exposure amount with the trade name Multilight ML-251A / B). The exposure amount is a UV integrated light meter (Ushio Electric Co., Ltd., product name UIT-150, light receiving unit, UV)
DS365). Developer 9033 which is an alkaline developer containing potassium carbonate
Alkaline development was performed with a 0.1% aqueous solution (manufactured by Shipley Far East Co., Ltd.) (25 ° C.) for a predetermined period of time. Doubled). After alkali development, wash with water, dry the glass substrate by air spray,
The thickness of the remaining resist was measured. Regarding the light sensitivity, the exposure amount at which the value (residual film sensitivity) calculated by the following formula became 95% or more was defined as the light sensitivity of the photosensitive coloring composition for a color filter. The results are shown in Table 3. Residual film sensitivity (%) = 100 × (film thickness after alkali development) /
(Film thickness before alkali development)

From the results shown in Table 3, the photosensitive coloring composition for a color filter (black matrix resist composition) using an acrylic copolymer having an amide group and a carboxyl group has high photosensitivity. It was shown to be very sensitive.

Evaluation of Physical Properties of Resist The photosensitive coloring compositions for color filters (black matrix resist compositions) of Examples 10 to 19 and Comparative Examples 4 and 5 shown in Table 3 were applied to a glass substrate (size 100 × 100).
mm) and dried at room temperature for 30 minutes.
Prebaked at 20 ° C for 20 minutes. After photocuring with an ultra-high pressure mercury lamp at an exposure amount twice the photosensitivity of each composition (resist), post-baking was performed at 200 ° C for 30 minutes, and the following evaluation was performed using the obtained resist-coated glass substrate. Carried out.

(OD value) A calibration curve was prepared by measuring the transmittance at 550 nm using a standard plate having a known OD (optical density) value. Next, the OD values were calculated by measuring the transmittance at 550 nm of the resist-coated glass substrates of the respective examples and comparative examples. The results are shown in Table 3.

(Reflectance) Spectrophotometer (U, manufactured by Shimadzu Corporation)
V-3100PC), the reflectance of each resist at 550 nm was measured.

(Pencil Scratch Value) JIS K5400
The coating strength of each sample was evaluated by the method shown in “General Paint Test Method 8.4 Pencil Scratch Value”. The results are shown in Table 3. Comparative Example 5 using only the epoxy acrylate resin as the resin component was 2B and did not have the necessary strength, but other than Comparative Example 5 was 3H and showed sufficient film strength.

[0153]

[Table 4]

[Table 5]

[Table 6]

[0154]

The photosensitive coloring composition for a color filter of the present invention can be made to have extremely high sensitivity by using an acrylic copolymer having an amide group and a carboxyl group and / or an epoxy acrylate having a carboxyl group. It is possible. Further, by using an acrylic copolymer having an amide group and a carboxyl group in the coloring composition used for the photosensitive coloring composition for a color filter, the dispersibility of a coloring pigment, particularly carbon black, is excellent.
Therefore, the photosensitive coloring composition for a color filter of the present invention can be optimally used for a color filter resist, particularly for a black matrix.

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) C09D 17/00 C09D 17/00 4J100 G02B 5/20 101 G02B 5/20 101 G03F 7/004 501 G03F 7/004 501 505 505 7/027 7/027 515 515 7/028 7/028 7/029 7/029 (72) Inventor Tsuyoshi Kato 5-1, Ogimachi, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Showa Denko KK (72) Inventor Yoshio Miyajima 5-1, Ogimachi, Kawasaki-ku, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Showa Denko K.K. F-term (reference) Kawasaki Laboratory, Research Institute, Ltd. 2H025 AA01 AA04 AB13 AC01 AD01 BC32 BC42 BC74 CA01 CA27 CA28 CA41 CA50 CB14 CB43 CB47 CC03 CC12 CC13 CC20 FA03 FA17 2H048 BA48 BB42 4J011 PA45 PA69 PB25 PC08 QA03 RA01 SA06 UA02 WA10 4J026 AA45 AA50 AB05 BA27 BA32 BA40 DB06 DB26 DB36 GA08 4J037 AA02 EE28 FF03 4J100 AB02P AB03P AB07P AG04P AJ02R AJ08R AJ09R AL03P AL04P AL08P AL08R AL09P AL10P AM02P AM15Q AM17Q AM19Q AM21Q AQ08Q AQ15PBC BC04 BC03 BA03PBABC

Claims (34)

[Claims] 1. A coloring composition comprising: (A) a binder resin having an amide group and a carboxyl group; and (B) a coloring material. 2. The coloring composition according to claim 1, further comprising (C) an organic solvent. 3. The method according to claim 1, wherein the binder resin (A) having an amide group and a carboxyl group is an acrylic copolymer obtained by copolymerizing the following three components. Coloring composition. a) 2 to 40% by weight of an ethylenically unsaturated monomer containing an amide group b) 2 to 40% by weight of an ethylenically unsaturated monomer containing a carboxyl group c) Ethylenically unsaturated monomer other than the above a) and b) Body 20-96% by weight 4. The amide group-containing ethylenically unsaturated monomer a) is one or more compounds selected from N- (meth) acryloylmorpholine, N-vinylpyrrolidone or N-vinylcaprolactam. The colored composition according to any one of claims 1 to 3. 5. The coloring composition according to claim 1, further comprising (A ′) an epoxy (meth) acrylate resin as a second component of the binder resin. 6. The coloring composition according to claim 5, wherein the epoxy (meth) acrylate resin is a novolak type epoxy (meth) acrylate resin having a carboxyl group. 7. The coloring composition according to claim 6, wherein the epoxy (meth) acrylate resin is a cresol novolak type epoxy (meth) acrylate resin having a carboxyl group. 8. The compounding ratio of the contained (A) binder resin having an amide group and a carboxyl group to (A ′) epoxy (meth) acrylate resin in a weight ratio of 30:70 to
The colored composition according to any one of claims 5 to 7, wherein the ratio is 90:10. 9. The coloring composition according to claim 1, wherein the coloring material (B) is a black pigment. 10. The coloring composition according to claim 9, wherein the black pigment is carbon black. 11. A photosensitive coloring composition for a color filter, comprising the coloring composition according to claim 1. Description: 12. A photosensitive coloring composition for a color filter, comprising the components of the coloring composition according to claim 1. Description: 13. The photosensitive coloring composition for a color filter according to claim 11, further comprising (D) a photopolymerization initiator. 14. The photosensitive coloring composition for a color filter according to claim 13, which comprises (E) an ethylenically unsaturated monomer. 15. The photopolymerization initiator (D) may be (a) a hexaarylbiimidazole compound, (b) a triazine compound, (c) an aminoacetophenone compound, or (d)
15. A photopolymerization initiator containing at least one selected from a combination of a sensitizer and an organic boron salt-based compound represented by the following general formula (1).
4. The photosensitive coloring composition for a color filter according to item 1. Embedded image (Wherein, R ₁ , R ₂ , R ₃ , and R ₄ each independently represent an optionally substituted alkyl, aryl, aralkyl, alkenyl, alkynyl, silyl, heterocyclic group, or a halogen atom. , Z ⁺ represents any cation.) 16. The photosensitive coloring composition for a color filter according to claim 13, further comprising (F) a polyfunctional thiol as a chain transfer agent. 17. The photosensitive coloring composition for a color filter according to claim 16, wherein the ratio of (F) the polyfunctional thiol to (D) the photopolymerization initiator is from 10: 1 to 1:10. object. 18. The photosensitive coloring composition for a color filter according to claim 11, wherein the content of each component other than the organic solvent is as follows. Binder resin (A) alone or combination of (A) and (A ') 10 to 40% by weight Ethylenically unsaturated monomer (E) 5 to 20% by weight Coloring material (B) 25 to 60% by weight Photopolymerization Initiator (D) 2 to 25% by weight 19. The photosensitive coloring composition for a color filter according to claim 16, wherein the content of each component other than the organic solvent is as follows. Binder resin (A) alone or combination of (A) and (A ') 10 to 40% by weight Ethylenically unsaturated monomer (E) 5 to 20% by weight Coloring material (B) 25 to 60% by weight Photopolymerization Initiator (D) 2 to 20% by weight Polyfunctional thiol (F) 2 to 20% by weight 20. An exposure amount required for curing is 200 mJ / c.
for color filters photosensitive coloring composition according to any one of claims 11 to 19, characterized in that at m ² or less. 21. A color filter using the photosensitive coloring composition for a color filter according to any one of claims 11 to 20. 22. A color filter, comprising forming a black matrix using the photosensitive coloring composition for a color filter according to claim 11, which comprises a black pigment. 23. The color filter according to claim 22, wherein the black pigment is carbon black. 24. A method for producing a color filter, comprising using the photosensitive coloring composition for a color filter according to any one of claims 11 to 20. 25. A method for forming a black matrix for a color filter, comprising using the photosensitive coloring composition for a color filter according to claim 11, which comprises a black pigment. 26. The method according to claim 25, wherein the black pigment is carbon black. 27. The method according to claim 1, wherein (A) the binder resin having an amide group and a carboxyl group according to any one of claims 1, 3, and 4 is used. A method for improving the dispersibility of a coloring material in a coloring composition. 28. The method according to claim 27, wherein the coloring material is a black pigment. 29. The method according to claim 28, wherein the black pigment is carbon black. 30. The method for improving photosensitivity of a photosensitive coloring composition for a color filter according to claim 11, wherein the binder resin according to claim 1, 3 to 8 is used. 31. The method according to claim 30, wherein the photosensitive coloring composition contains a black pigment. 32. The method for improving the photosensitivity of a photosensitive coloring composition for a color filter according to claim 31, wherein the black pigment is carbon black. 33. A method for producing a coloring composition according to claim 1. 34. A method for producing a photosensitive coloring composition for a color filter according to any one of claims 11 to 20.