JP2015206935A - Coloring photosensitive resin composition and color filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coloring photosensitive resin composition capable of preventing a residue and forming an excellent coloring pattern, as a coloring photosensitive resin composition for forming a light-shielding film 2 and a transparent coloring pixel 3, in a color filter including the light-shielding film (BM, or black matrix) 2 and the transparent coloring pixel 3 composed of a red pixel R, a green pixel G, a blue pixel B formed on a transparent substrate 1.SOLUTION: A coloring photosensitive resin composition includes: (A) colorant; (B) binder resin; (C) polyfunctional monomer; (D) photoinitiator; (E) dispersant; and (F) solvent. If a K value is a value obtained by dividing a weight average molecular weight by an acid value, a value obtained by dividing the K value of the (B) binder resin by the K value of the (E) dispersant is 0.0050-80.

Description

  The present invention relates to a colored photosensitive resin composition, and more particularly to a colored photosensitive resin composition used for forming a color pixel of a color filter having no quality defect.

  In a liquid crystal display, a liquid crystal is sandwiched between two substrates and a voltage is applied to the liquid crystal for each pixel to control light transmission and non-transmission (blocking). It is a display that performs display. A color display is made possible by providing a transparent colored film for each pixel on one of the two substrates and coloring the transmitted light. The substrate provided with the transparent colored pixels is generally called a color filter. The color filter has, for example, a structure shown in a cross-sectional explanatory view of FIG.

  That is, the color filter includes a transparent substrate 1, a light-shielding film 2 (BM, black matrix) that partitions the surface of the transparent substrate into a large number of pixel regions, and transparent colored pixels 3 provided in the pixel regions. It is configured. The transparent colored pixels have different colors for each pixel region, and typically, transparent colored pixels of three colors of red (R), green (G), and blue (B) are used.

  These three colors are the three primary colors of light, and almost all of the colors can be displayed by these three primary colors and their mixture. The BM prevents mixing of light transmitted through a specific pixel region and light transmitted through an adjacent pixel region. For example, when there is a green (G) pixel adjacent to a red (R) pixel, it is possible to display a clear color screen by preventing mixing of light transmitted through both.

  A manufacturing method of such a color filter is a photolithography method in which a light-shielding film (BM, black matrix) and each layer of three colored patterns are respectively applied on a transparent substrate, and a pigment dispersion resist coating, exposure, and development steps are repeated. (Also called the pigment dispersion method) is the center of the production method.

  The conventional colored photosensitive resin composition has a problem that a residue is likely to be generated after development. When the residue is generated, it becomes a foreign substance of the color filter, for example, a color image or color displayed on a color liquid crystal display device. The quality of the color image etc. image | photographed with a solid-state image sensor is reduced.

  In order to improve the residue, the hydroxyl value is stipulated, but since the developing speed of the dispersant and the resin is different, the residue is inevitably generated (Patent Document 1).

Japanese Patent No. 5294698

  The objective of this invention is providing the colored photosensitive resin composition which can form the outstanding coloring pattern, without producing a residue.

As means for solving the above-mentioned problems, the invention described in claim 1 includes (A) a colorant, (B) a binder resin, (C) a polyfunctional monomer, (D) a photopolymerization initiator, (E A colored photosensitive resin composition comprising a) a dispersant, and (F) a solvent,
A value obtained by dividing the weight average molecular weight by the acid value is defined as a K value,
The colored photosensitive resin composition, wherein a value obtained by dividing the K value of the (B) binder resin by the K value of the (E) dispersant is 0.0050 or more and less than 80.

  Moreover, the invention described in claim 2 is the colored photosensitive resin according to claim 1, wherein the dispersant (E) has a weight average molecular weight of 2000 to 60000 and an acid value of 3 to 200 mgKOH. It is a composition.

  In addition, the invention according to claim 3 is characterized in that the weight average molecular weight of the (B) binder resin is 5000 to 50000, and the acid value is 10 to 150 mgKOH. It is a photosensitive resin composition.

The invention described in claim 4 is a color filter using the colored photosensitive resin composition according to any one of claims 1 to 3.

  A colored photosensitive resin composition that can form an excellent colored pattern without producing a residue can be provided.

It is a cross-sectional schematic diagram which shows the color filter of embodiment. It is a cross-sectional schematic diagram which shows the color filter of another embodiment.

  Hereinafter, the colored photosensitive resin composition and the color filter according to the present invention will be described in detail.

  FIG. 1 shows a cross-sectional shape of a color filter according to an embodiment of the present invention. As shown in FIG. 1, the color filter of the present invention is composed of a light-shielding film (BM, black matrix) 2 and transparent colored pixels 3 comprising red pixels R, green pixels G, and blue pixels B on a transparent substrate 1. ing. As shown in FIG. 2, the overcoat 4 may be laminated. Each of the transparent colored pixels 3 is made of a colored photosensitive resin composition, and includes (A) a colorant, (B) a binder resin, (C) a polyfunctional monomer, (D) a photopolymerization initiator, and (E) a dispersant. Contains. Hereinafter, in this specification, the transparent substrate, the light shielding film, and the transparent colored pixels are combined to form a color filter.

  Hereinafter, the colored photosensitive resin composition used for the color filter according to the present invention will be described.

<Pigment>
As the pigment according to the present invention, generally available organic pigments can be used, and dyes, natural pigments, and inorganic pigments can be used in combination according to the hue of the transparent colored film to be formed. As the organic pigment, those having high color developability and high heat resistance, particularly high heat decomposition resistance are preferably used. An organic pigment can be used individually by 1 type or in mixture of 2 or more types. In addition, the organic pigment may be refined by salt milling, acid pasting, or the like. Below, the specific example of the organic pigment which can be used for the photosensitive resin composition which concerns on this embodiment is shown by a color index (CI) number.

  In the case of forming a red pixel, C.I. I. Pigment Red 7, 9, 14, 41, 48: 1, 48: 2, 48: 3, 48: 4, 81: 1, 81: 2, 81: 3, 122, 123, 146, 149, 168, 177, Red pigments such as 178, 179, 184, 185, 187, 192, 200, 202, 208, 210, 216, 220, 223, 224, 226, 240, 254, 255, 264, 272 can be used. A yellow pigment and an orange pigment can be used in combination with the red photosensitive resin composition.

  In the case of forming a green pixel, C.I. I. Green pigments such as Pigment Green 7, 10, 36, 37, and 58 can be used. A yellow pigment can be used in combination with the green photosensitive resin composition.

  In the case of forming a blue pixel, C.I. I. Blue pigments such as Pigment Blue 15, 15: 1, 15: 2, 15: 3, 15: 4, 15: 6, 16, 64, and 80 can be used. A purple pigment can be used in combination with the blue photosensitive resin composition in order to improve color reproducibility. Examples of purple pigments include C.I. I. Pigment Violet 1, 19, 23, 27, 29, 30, 32, 37, 40, 42, 50 can be exemplified.

  Since the blue pixel has a durability problem such as deterioration in heat resistance, it is desirable to use a yellow pigment in combination.

  Examples of yellow pigments include C.I. I. Pigment Yellow 1, 2, 3, 4, 5, 6, 10, 12, 13, 14, 15, 16, 17, 18, 24, 31, 32, 34, 35, 35: 1, 36, 36: 1, 37, 37: 1, 40, 42, 43, 53, 55, 60, 61, 62, 63, 65, 73, 74, 77, 81, 83, 93, 94, 95, 97, 98, 100, 101, 104, 106, 108, 109, 110, 113, 114, 115, 116, 117, 118, 119, 120, 123, 126, 127, 128, 129, 138, 139, 147, 150, 151, 152, 153, 154, 155, 156, 161, 162, 164, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 179, 180 181, 182, 185, 187, 188, 193, 194, 198, 199, 213, 214 and the like. I. Pigment Yellow 150 is effective in improving heat resistance.

  The color filter according to the present invention includes pixels of red, green, blue, and other colors (for example, cyan, magenta, orange) as necessary. There is no restriction | limiting in particular in the coloring material used for these pixels, A well-known pigment can be used.

  When forming a cyan pixel, C.I. I. Pigment Blue 15: 1, 15: 2, 15: 3, 15: 4, 15: 6, 16, 80, and the like can be used.

  When forming magenta pixels, C.I. I. Pigment Red 7, 14, 41, 48: 1, 48: 2, 48: 3, 48: 4, 81: 1, 81: 2, 81: 3, 146, 177, 178, 184, 185, 187, 200, Pigments such as 202, 208, 210, 246, 254, 255, 264, 270, and 272 can be used. A yellow pigment can be used in combination with the magenta photosensitive resin composition.

  In the case of forming an orange pixel, C.I. I. Pigment Orange 36, 43, 51, 55, 59, 61, 71, 73 or the like can be used.

When a light shielding film (BM, black matrix) is formed, carbon black, aniline black, anthraquinone black pigment, perylene black pigment, specifically C.I. I. Pigment Black 1, 6, 7, 12, 20, 31, etc. can be used. A mixture of a red pigment, a blue pigment, and a green pigment can also be used for the black photosensitive resin composition. As the black pigment, carbon black is preferable from the viewpoint of price and light shielding properties, and the carbon black may be surface-treated with a resin or the like. Moreover, in order to adjust a color tone, a blue pigment and a purple pigment can be used together in a black photosensitive resin composition.

  In addition, the photosensitive resin composition according to the present embodiment can contain a dye within a range in which heat resistance is not lowered for color matching. The dye can be used in an amount of 0.1 to 50% by weight based on the total weight of the pigment (100% by weight).

  Examples of the dye include a carbonium dye, an azo dye, a coumarin dye, and a naphthalimide dye. Specific examples of the carbonium dye include diphenylmethane dye, triphenylmethane dye, xanthene dye, and acridine dye. Among these, a carbonium dye is preferable, and a triphenylmethane dye and a xanthene dye are more preferable.

Examples of the dye include compounds classified as dyes in the color index (published by The Society of Dyers and Colorists) and known dyes described in dyeing notes (color dyeing company). Below, the specific example of the dye which can be used for the photosensitive resin composition which concerns on this embodiment is shown by a color index (CI) number. Specific examples of such compounds include C.I. I. Acid Yellow 3, 7, 250, C.I. I. Acid Red 77, C.I. I. Acid Blue 9, C.I. I. Basic Yellow 1, 35, 40, 95. C. I. Basic Red 1-1, 13, C.I. I. Basic Violet 7, 11: 1, C.I. I. Basic Orange 22, C.I. I. Basic Blue 7, C.I. I. Basic Green
1, C.I. I. Disperse Yellow 121, 82, C.I. I. Disperse Orange 11, C.I. I. Disperse Red 58, C.I. I. Disperse Blue 7, C.I. I. Direct Yellow 11, 24, 26, 85, 100, 147, C.I. I. Direct Orange 8, 13, 26, 29: 1, 46, C.I. I. Direct Red 1, 9, 17, 239, 240, 242, 254, C.I. I. Direct Blue 22, C.I. I. Direct Green 6, C.I. I. Solvent Yellow 7, 44, C.I. I. Solvent Red 49, C.I. I. Solvent Blue 5, C.I. I. Solvent Green 7 etc. are mentioned.

  Commercially available products of such compounds include Fluorescent series (Arimoto Chemical Co., Ltd.), rhodamine B, rhodamine 6 GCP (Taoka Chemical Co., Ltd.), quinoline yellow SS-5G, quinoline yellow GC (Chuo Synthetic Chemical Co., Ltd.), Azosol brilliant yellow 4GF, azosol fast blue GLA, seriton pink 3B, fast yellow YL, Victoria blue FN, brilliant sulfoflavin FF, thioflavine, basic yellow HG, fluorescein, eosin and the like.

  Examples of xanthene dyes include C.I. I. Acid Red 51, 52, 87, 92, 94, 289, 388, C.I. I. Acid Violet 9, 30, 102, C.I. I. Basic Red 1, 8, C.I. I. Basic Violet 10, C.I. I. Solvent Red 218, C.I. I. Modern Red 27, C.I. I. Examples include Reactive Red 36, xanthene dyes described in JP 2010-32999 A, and xanthene dyes described in Japanese Patent No. 4492760.

  The photosensitive resin composition described above can contain an inorganic pigment in order to ensure good coatability, sensitivity, developability, and the like while balancing saturation and lightness. Inorganic pigments include titanium oxide, barium sulfate, zinc white, lead sulfate, yellow lead, zinc yellow, red rose (red iron oxide (III)), cadmium red, ultramarine blue, bitumen, chromium oxide green, cobalt green, amber, titanium Examples thereof include black, synthetic iron black, and carbon black.

  An inorganic pigment can be used individually by 1 type or in mixture of 2 or more types. The inorganic pigment can be used in an amount of 0.1 to 10% by weight based on the total weight of the pigment (100% by weight).

<Dispersant>
When dispersing the pigment, a dispersant such as a surfactant, a resin-type pigment dispersant, and a dye derivative can be appropriately used. Since the dispersant is excellent in dispersing the pigment and has a large effect of preventing reaggregation of the pigment after dispersion, a photosensitive resin composition obtained by dispersing the pigment in a transparent resin and an organic solvent using the dispersant is used. If so, a color filter excellent in transparency can be obtained. The pigment dispersant can be used in an amount of 0.1 to 40 parts by weight, preferably 0.1 to 30 parts by weight, with respect to 100 parts by weight of the pigment in the photosensitive resin composition.

  A resin-type pigment dispersant is a resin having a pigment-affinity part that has the property of adsorbing to a pigment, and a part that is compatible with a monomer having an ethylenically unsaturated double bond or a transparent resin. This serves to stabilize the dispersion of the pigment into the monomer having an ethylenically unsaturated double bond. Specific examples of resin-type pigment dispersants include polycarboxylic acid esters such as polyurethane and polyacrylate, unsaturated polyamides, polycarboxylic acids, polycarboxylic acid (partial) amine salts, polycarboxylic acid ammonium salts, and polycarboxylic acid alkylamines. Salts, polysiloxanes, long-chain polyaminoamide phosphates, hydroxyl group-containing polycarboxylic acid esters, their modified products, amides formed by the reaction of poly (lower alkyleneimines) with polyesters having free carboxyl groups, and the like Water-based dispersants such as oily dispersants such as salts, (meth) acrylic acid-styrene copolymers, (meth) acrylic acid- (meth) acrylic acid ester copolymers, styrene-maleic acid copolymers, polyvinyl alcohol, polyvinylpyrrolidone Resin, water-soluble polymer, polyester Modified polyacrylate, ethylene oxide / propylene oxide addition compound, phosphate ester-based and the like are used, they can be used alone or in admixture of two or more.

  Examples of the surfactant include polyoxyethylene alkyl ether sulfate, sodium dodecylbenzenesulfonate, alkali salt of styrene-acrylic acid copolymer, sodium alkylnaphthalenesulfonate, sodium alkyldiphenyletherdisulfonate, monoethanolamine lauryl sulfate. , Anionic surface activity such as triethanolamine lauryl sulfate, ammonium lauryl sulfate, monoethanolamine stearate, sodium stearate, sodium lauryl sulfate, monoethanolamine of styrene-acrylic acid copolymer, polyoxyethylene alkyl ether phosphate Agents: polyoxyethylene oleyl ether, polyoxyethylene lauryl ether, polyoxyethylene nonylphenyl ether, polyoxy Nonionic surfactants such as ethylene alkyl ether phosphates, polyoxyethylene sorbitan monostearate, and polyethylene glycol monolaurate; chaotic surfactants such as alkyl quaternary ammonium salts and their ethylene oxide adducts; alkyldimethyl Examples include amphoteric surfactants such as alkylbetaines such as aminoacetic acid betaine and alkylimidazolines, and fluorine-based and silicone-based surfactants.

A pigment derivative is a compound in which a substituent is introduced into an organic pigment. Such organic dyes also include light yellow aromatic polycyclic compounds such as naphthalene and anthraquinone which are not generally called dyes. Examples of the dye derivatives are described in JP-A-63-305173, JP-B-57-15620, JP-B-59-40172, JP-B-63-17102, JP-B-5-9469, and the like. These can be used alone or in combination of two or more.

<Binder resin>
The binder resin according to the present invention may have a transmittance of preferably 80% or more, more preferably 95% or more in the entire wavelength region of 400 to 700 nm in the visible light region. A non-photosensitive transparent resin and a photosensitive transparent resin can be used for the binder resin. They may be used alone or in combination.

  The non-photosensitive transparent resin is a resin that does not have an ethylenically unsaturated double bond, and includes a thermoplastic resin and a thermosetting resin. Examples of the thermoplastic resin include butyral resin, styrene-maleic acid copolymer, chlorinated polyethylene, chlorinated polypropylene, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, polyvinyl acetate, polyurethane resin, and polyester resin. And acrylic resins, alkyd resins, polystyrene resins, polyamide resins, rubber resins, cyclized rubber resins, celluloses, polybutadiene, polyethylene, polypropylene, polyimide resins, and the like. Examples of the thermosetting resin include an epoxy resin, a benzoguanamine resin, a rosin-modified maleic acid resin, a rosin-modified fumaric acid resin, a phenol resin, a melamine resin, and a urea resin.

  The photosensitive transparent resin is a resin having an ethylenically unsaturated double bond, for example, a polymer having a reactive substituent such as a hydroxyl group, a carboxyl group, an amino group, an isocyanate group, an aldehyde group, an epoxy group, A functional group having an ethylenically unsaturated double bond such as a (meth) acryloyl group or a styryl group is introduced into the polymer by reacting a (meth) acrylic compound having a reactive substituent such as a carboxyl group or cinnamic acid. Resin.

  Specifically, a functional group capable of reacting with a hydroxyl group and an ethylenically unsaturated double bond are added to a copolymer obtained by copolymerizing an ethylenically unsaturated monomer having a hydroxyl group and another ethylenically unsaturated monomer. Some of them are obtained by reacting the compounds they have. Examples of the functional group capable of reacting with a hydroxyl group include an isocyanate group and a carboxyl group, but an isocyanate group is particularly preferred in terms of reactivity, and specifically, a compound having an isocyanate group and an ethylenically unsaturated double bond. , 2-acryloyl ethyl isocyanate, 2-methacryloyl ethyl isocyanate and the like. In addition, a polymer containing an acid anhydride such as a styrene-maleic anhydride copolymer or an α-olefin-maleic anhydride copolymer is half-esterified with a (meth) acrylic compound having a hydroxyl group such as hydroxyalkyl (meth) acrylate. A modified version is also used.

  The content of the binder resin is preferably 10 to 300 parts by weight, more preferably 10 to 200 parts by weight with respect to 100 parts by weight of the pigment.

<Multifunctional monomer>
Examples of the polyfunctional monomer having an ethylenically unsaturated double bond include pentaerythritol tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, ethylene oxide-modified trimethylolpropane tri (meth) acrylate, and propylene oxide-modified trimethylol. Representative examples include various acrylic esters and methacrylic esters such as propane tri (meth) acrylate. The polyfunctional monomer preferably has 4 to 12 ethylenically unsaturated double bonds from the viewpoint of increasing the sensitivity of the photosensitive resin composition. In the photosensitive resin composition containing the polyfunctional monomer which has 3 or less ethylenically unsaturated double bonds, desired sensitivity cannot be obtained.

  The polyfunctional monomer which has an ethylenically unsaturated double bond can be used individually or in mixture of 2 or more types.

  The content of the polyfunctional monomer having an ethylenically unsaturated double bond is preferably 10 to 300 parts by weight, more preferably 10 to 200 parts by weight with respect to 100 parts by weight of the pigment.

  In order to control the shape of the colored pixel according to the present invention, the ratio of the monomer having an ethylenically unsaturated double bond contained in the colored pixel and the transparent resin is preferably 0.5 to 0.7. If it is 0.7 or more, the shape of the colored pixel changes from vertical to an overhang shape, and vignetting occurs when the overcoat is applied after the colored pixel is formed. On the other hand, when it is 0.5 or less, the shape becomes a forward taper shape that is extremely gentle. In recent panel designs in which BM thinning progresses, white spots at the time of colored pixels become a problem. Furthermore, the increase in the ratio of the transparent resin results in poor developability and lowers production efficiency.

<Photopolymerization initiator>
Examples of the photopolymerization initiator according to the present invention include an oxime ester photopolymerization initiator, an α-aminoalkylphenone photopolymerization initiator, a carbazole photopolymerization initiator, and an acyl phosphine oxide photopolymerization initiator. Can be mentioned.

  Particularly preferred oxime ester photoinitiators include ethanone, 1- [9-ethyl-6- (2-methylbenzoyl) -9H-carbazol-3-yl]-, 1- (0-acetyloxime), 1 , 2-octadion-1- [4- (phenylthio)-, 2- (0-benzoyloxime)].

  Particularly preferred acylphosphine oxide photopolymerization initiators include 2,4,6-trimethylbenzoyl-diphenylphosphine oxide.

  Particularly preferable α-aminoalkylacetophenone photopolymerization initiators include 2-methyl-1- (4-methylthiophenyl) -2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1- ( 4-morpholinophenyl) -butane-1,2- (dimethylamino) -2-[(4-methylthiophenyl) methyl] -1- [4- (4-morpholinyl) phenyl] -1-butanone.

  Particularly preferable carbazole-based photopolymerization initiators include 3,6-bis (2-methyl-2-morpholinopropionyl) -9-methylcarbazole and 3,6-bis (2-methyl-2-morpholinopropionyl) -9-. Benzoylcarbazole, 3,6-bis (2-methyl-2-morpholinopropionyl) -9-n-butylcarbazole, 3,6-bis (2-methyl-2-morpholinopropionyl) -9-n-octylcarbazole, 3 , 6-bis (2-methyl-2-morpholinopropionyl) -9-n-dodecylcarbazole.

These photoinitiators can be used individually by 1 type or in mixture of 2 or more types. The content of the photopolymerization initiator can be used in an amount of 5 to 200 parts by weight, preferably 10 to 150 parts by weight with respect to 100 parts by weight of the pigment.
The photosensitive resin composition according to the present invention basically does not require a sensitizer, but may be used in combination with a photopolymerization initiator. These sensitizers can be used individually by 1 type or in mixture of 2 or more types. The content of the sensitizer is preferably 0.1 to 60 parts by weight with respect to 100 parts by weight of the photopolymerization initiator.

  Moreover, the photosensitive resin composition of this invention can contain the polyfunctional thiol which functions as a chain transfer agent further. A polyfunctional thiol can be used individually by 1 type or in mixture of 2 or more types. The content of the polyfunctional thiol is preferably 0.05 to 100 parts by weight, more preferably 0.1 to 60 parts by weight with respect to 100 parts by weight of the pigment.

  The photosensitive resin composition of the present invention can contain a storage stabilizer in order to stabilize the viscosity with time of the composition. Moreover, in order to improve adhesiveness with a transparent substrate, adhesion improving agents, such as a silane coupling agent, can also be contained. The storage stabilizer can be used in an amount of 0.1 to 10 parts by weight with respect to 100 parts by weight of the pigment in the photosensitive resin composition.

  In the photosensitive resin composition of the present invention, the pigment is sufficiently dispersed in the composition, and applied to a transparent substrate such as a glass substrate so that the dry film thickness is 0.2 to 5 μm. In order to facilitate the formation of a film (BM, black matrix), a solvent can be contained. Solvents may be used alone or in combination.

  Examples of the solvent include 1,2,3-trichloropropane, 1,3-butanediol, 1,3-butylene glycol, 1,3-butylene glycol diacetate, 1,4-dioxane, 2-heptanone, 2- Methyl-1,3-propanediol, 3,5,5-trimethyl-2-cyclohexen-1-one, 3,5,5-trimethylcyclohexanone, ethyl 3-ethoxypropionate, 3-methyl-1,3-butane Diol, 3-methoxy-3-methyl-1-butanol, 3-methoxy-3-methylbutyl acetate, 3-methoxybutanol, 3-methoxybutyl acetate, 4-heptanone, m-xylene, m-diethylbenzene, m-di Chlorobenzene, N, N-dimethylacetamide, N, N-dimethylformamide, n-butyl Lucol, n-butylbenzene, n-propyl acetate, N-methylpyrrolidone, o-xylene, o-chlorotoluene, o-diethylbenzene, o-dichlorobenzene, p-chlorotoluene, p-diethylbenzene, sec-butylbenzene, tert -Butylbenzene, γ-butyrolactone, isobutyl alcohol, isophorone, ethylene glycol diethyl ether, ethylene glycol dibutyl ether, ethylene glycol monoisopropyl ether, ethylene glycol monoethyl ether, ethylene glycol monoethyl ether acetate, ethylene glycol monotertiary butyl ether, ethylene Glycol monobutyl ether, ethylene glycol monobutyl ether acetate, ethylene glycol monopropylene Ether, ethylene glycol monohexyl ether, ethylene glycol monomethyl ether, ethylene glycol monomethyl ether acetate, diisobutyl ketone, diethylene glycol diethyl ether, diethylene glycol dimethyl ether, diethylene glycol monoisopropyl ether, diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether, diethylene glycol monobutyl ether acetate, diethylene glycol Monomethyl ether, cyclohexanol, cyclohexanol acetate, cyclohexanone, dipropylene glycol dimethyl ether, dipropylene glycol methyl ether acetate, dipropylene glycol monoethyl ether, dipropylene Glycol monobutyl ether, dipropylene glycol monopropyl ether, dipropylene glycol monomethyl ether, diacetone alcohol, triacetin, tripropylene glycol monobutyl ether, tripropylene glycol monomethyl ether, propylene glycol diacetate, propylene glycol phenyl ether, propylene glycol monoethyl Ether, propylene glycol monoethyl ether acetate, propylene glycol monobutyl ether, propylene glycol monopropyl ether, propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, propylene glycol monomethyl ether propionate, benzyl alcohol, methyl isobutyl Ketone, methyl cyclohexanol, acetic acid n- amyl acetate n- butyl, isoamyl acetate, isobutyl acetate, propyl acetate, dibasic esters, and the like, used these alone or in mixtures.

<Production method of photosensitive resin composition>
The colored photosensitive resin composition of the present invention comprises a three-roll mill in a pigment, a dye, a monomer having an ethylenically unsaturated double bond together with the pigment dispersant as necessary, a transparent resin and an organic solvent as necessary. These can be finely dispersed using various dispersing means such as a two-roll mill, a sand mill, a kneader, and an attritor, and added with a photopolymerization initiator. Moreover, the photosensitive resin composition for color filters containing 2 or more types of pigment | dyes can also mix and manufacture what each finely disperse | distributed to the monomer etc. which have an ethylenically unsaturated double bond separately. it can.

  In addition, the photosensitive resin composition of the present invention is a coarse particle of 5 μm or more, preferably 1 μm or more, more preferably 0.5 μm or more by means of centrifugation, sintered filter, membrane filter or the like. It is preferable to remove particles and mixed dust.

In the color filter of the present invention, a protective film (overcoat) may be formed on the colored pixels. The overcoat is made of a transparent resin, and one resin composition that can be used includes an epoxy compound having two or more epoxy groups. Examples of the epoxy compound having two or more epoxy groups include bisphenol A type epoxy, bisphenol F type epoxy, dihydroxybiphenyl type epoxy, phenol novolac type epoxy and the like. It is preferable to mix an epoxy curing agent. Examples of the epoxy curing agent include carboxylic acids, phenols, and amines, but preferably polyvalent carboxylic acids, polyhydric phenols and acid anhydrides thereof, and carboxylic acids are capped. There are block acids etc., specifically, aromatic polycarboxylic acids such as trimellitic acid, pyromellitic acid, phthalic acid and naphthalenedicarboxylic acid, alicyclic polycarboxylic acids such as tetrahydrophthalic acid, adipic acid, amber Aliphatic polycarboxylic acid such as acid and butanetetracarboxylic acid Examples thereof include unsaturated aliphatic polyvalent carboxylic acids such as boric acids, maleic acid, fumaric acid and itaconic acid.

  The second resin composition that can be used for the overcoat resin composition contains 50 to 70% of an acrylic monomer having a polyunsaturated double bond based on the solid content, and a binder resin and a curing initiator. It is a resin composition containing.

  Examples of the resin include (meth) acrylic resins, styrene resins, novolac resins, maleic acid resins, rosin resins, and the like.

  As the polymerizable monomer, for example, the following monomers can be mixed or used alone. For example, a monomer containing a hydroxyl group such as 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate , Triethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, tetramethylene glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, trimethylolethane tri (meth) acrylate, pentaerythritol di ( (Meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol tetra (meth) acrylate , (Meth) acrylic esters such as dipentaerythritol hexa (meth) acrylate, glycerol (meth) acrylate, or pentaerythritol tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, tricyclodeca Nyl (meth) acrylate, hexa (meth) acrylate of a caprolactone adduct of dipentaerystol hexa (meth) acrylate, melamine (meth) acrylate, and the like.

  It is preferable that a part of the polymerizable monomer is a polymerizable monomer including a carboxyl group-containing polyfunctional monomer. For example, pentaerythritol or a derivative thereof may be used.

  In addition to thermal polymerization initiators, radical generators that generate active species that initiate the polymerization reaction of radical polymerizable monomers generate radicals by heat in what are called general photopolymerization initiators. Can be used. Specifically, tert-butylperoxy-iso-butarate, 2,5-dimethyl-2,5-bis (benzoyldioxy) hexane, 1,4-bis [α- (tert-butyldioxy) -iso- Propoxy] benzene, di-tert-butyl peroxide, 2,5-dimethyl-2,5-bis (tert-butyldioxy) hexene hydroperoxide, α- (iso-propylphenyl) -iso-propyl hydroperoxide, 2,5- Bis (hydroperoxy) -2,5-dimethylhexane, tert-butyl hydroperoxide, 1,1-bis (tert-butyldioxy) -3,3,5-trimethylcyclohexane, butyl-4,4-bis (t-butyldioxy) ) Valerate, cyclohexanone peroxide, 2,2 ', 5,5'-tetra (tert-butylperoxycarbonyl) benzophenone, 3, 3 ′, 4,4′-tetra (tert-butylperoxycarbonyl) benzophenone, 3,3 ′, 4,4′-tetra (tert-amylperoxycarbonyl) benzophenone, 3,3 ′, 4,4′-tetra ( tert-hexylperoxycarbonyl) benzophenone, 3,3′-bis (tert-butylperoxycarbonyl) -4,4′-dicarboxybenzophenone, tert-butylperoxybenzoate, t-butyldiperoxyisophthalate, etc. Organic peroxides, quinones such as 9,10-anthraquinone, 1-chloroanthraquinone, 2-chloroanthraquinone, octamethylanthraquinone, 2-benzanthraquinone, benzoin methyl, benzoin ethyl ether, α Benzoin derivatives such as -methylbenzoin and α-phenylbenzoin It can be. Furthermore, examples of radical polymerization initiators that can be used in the present invention include Irgacure 651, 184, 1173, 907, 369, and 819 manufactured by BASF, TPO manufactured by CGI124 and BASF, Kayure DTEX manufactured by Nippon Kayaku, or 4 In addition to benzophenones such as 4,4′-diethylaminobenzophenone and 4,4′-dimethylaminobenzophenone, biimidazole compounds and triazine compounds can also be mentioned.

<Manufacturing process of colored pixels>
Next, a method for manufacturing a color filter according to the present invention will be described.

<Application process>
As the transparent substrate of the color filter, known transparent substrate materials such as a glass substrate, a quartz substrate, and a plastic substrate can be used, and among them, a glass substrate that is excellent in transparency, strength, heat resistance, and weather resistance is preferable. In the coating process of the photosensitive resin composition, a known coating apparatus such as a slit die coater or a spin coater can be used. Then, in order to remove a solvent component, a reduced pressure drying process and a prebaking process can be performed as needed.

<Exposure process>
In the pattern exposure step, a colored pixel or a light shielding film (BM, black matrix) can be formed by a conventionally known exposure method. In the pattern exposure step, the pattern is cured by irradiating with ultraviolet rays or electron beams from the upper surface of the transparent substrate. The light or radiation to be irradiated is not particularly limited as long as it has an absorption wavelength at which the photosensitive resin composition is cured, but ultraviolet rays or electron beams are particularly preferable. In particular, an ultraviolet irradiation treatment with an ultrahigh pressure mercury lamp, a high pressure mercury lamp, a metal halide lamp or the like is preferable. Further, it is desirable that unnecessary wavelengths are cut through a corresponding filter.

<Development process>
In the development step, unexposed portions of the photosensitive resin composition are removed by a conventionally known development method to form a colored pixel or a light shielding film (BM, black matrix). In removing the unexposed portion, an aqueous solution such as sodium carbonate or sodium hydroxide is used as an alkali developer, and an organic alkali such as dimethylbenzylamine or triethanolamine can also be used. Moreover, an antifoamer and surfactant can also be added to a developing solution. As a development processing method, a shower development method, a spray development method, a dip (immersion) development method, a paddle (liquid accumulation) development method, or the like can be applied.

<Baking process>
In the present embodiment, after the colored pixels and the light shielding film are formed, a step of performing heat treatment and thermosetting can be provided. As a heating method, a convection oven, a hot plate, a halogen heater, heating by an IR oven, or the like can be used, and is not particularly limited. Here, it is preferable that baking conditions are 200-250 degreeC, and are heated for 10 minutes-60 minutes.

<Overcoat manufacturing process>
Next, the manufacturing process of the overcoat formed on the colored pixels will be described.

  When the overcoat resin composition is a photosensitive resin composition, an overcoat can be produced by the same method as the colored pixel production process, and the resin composition has two or more epoxy groups. When the compound is contained, an overcoat can be produced by the same method as the colored pixel production process except that the exposure step and the development step are omitted.

  EXAMPLES Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited to these Examples. In the examples and comparative examples, “parts” and “%” mean “parts by weight” and “% by weight”, respectively.

  Here, the weight average molecular weight (Mw) is a molecular weight in terms of polystyrene in gel permeation chromatography (GPC) measurement.

  The molecular weight of the dispersant and the binder resin is a polystyrene-equivalent weight average molecular weight measured by GPC (gel permeation chromatography). Tetrahydrofuran is used as the eluent by GPC-8020 manufactured by Tosoh Corporation, and the column is TSKgel SuperHM-. Three M (manufactured by Tosoh Corporation) were used, and measurement was performed at a flow rate of 0.6 ml / min, an injection volume of 10 μl, and a column temperature of 40 ° C.

<Acid value>
Here, the acid value is a value obtained by converting the measured acid value (mgKOH / g) into a solid content according to the potentiometric titration method of JIS K 0070.

  The acid value was measured as follows. About 1 g of a dispersant solution or a resin solution for measuring the acid value was weighed, 30 g of methyl ethyl ketone and 1 g of water were added and stirred for 10 minutes, and potentiometric titration was performed with a 0.1 N potassium hydroxide ethanol solution. A blank test was conducted in the same manner. The solid content of the target product was measured at 200 ° C. for 10 minutes, and the number of mg of potassium hydroxide equivalent to the carboxyl group contained in 1 g of the solid content of the dispersant solution or the resin solution was determined from the obtained titration value and solid content. .

  When the acid value of the dispersant is less than 3 mgKOH / g, the pigment adsorbing ability may be lowered and there may be a problem in pigment dispersibility. When the dispersant exceeds 200 mgKOH / g, the interaction between resins becomes strong and the viscosity of the pigment dispersion composition is increased. May be higher.

  (B) It is preferable that the weight average molecular weights of binder resin are 5000-50000. When the weight average molecular weight is less than 5,000, the film forming property of the coating film of the pigment dispersion is poor, and there is a possibility that the development margin is narrow. On the other hand, if the weight average molecular weight is larger than 50000, the fluidity of the pigment dispersion may be deteriorated.

  (B) It is preferable that the acid value of binder resin is 10-150 mgKOH / g. (B) Since the binder resin is also a resin for imparting developability, if the acid value is less than 10 mgKOH / g, the developability tends to deteriorate, and if the acid value is greater than 150 mgKOH / g, the pigment dispersion Fluidity may be worse.

  (B) Binder resin constituting the colored photosensitive resin composition, (E) Dispersants having different weight average molecular weights and acid values were synthesized, and the influence on developability was observed.

<(B) Synthesis of Binder Resin A>
In a flask equipped with a stirrer, dropping funnel, condenser, thermometer, gas inlet tube,
94.5 parts of methoxypropyl acetate was charged, stirred while replacing with nitrogen, and heated to 110 ° C.
next,
monomer:
Methacrylic acid 15.0 parts
Butyl acrylate 20.0 parts
4-hydroxybutyl acrylate 15.0 parts
Benzyl methacrylate 50.0 parts Initiator: V-601 (manufactured by Wako Pure Chemical Industries, Ltd.) 1.5 parts methoxypropyl acetate 3.5 parts mixed was added dropwise over 2 hours.

After completion of dropping, the reaction was further carried out at 110 ° C. for 3 hours,
Initiator: V-601 (manufactured by Wako Pure Chemical Industries, Ltd.) 0.15 part of methoxypropyl acetate mixed with 0.35 part was added, and the reaction was continued at 110 ° C. for 1 hour, and this was diluted with methoxypropyl acetate. A 30% solids solution of binder resin A was obtained. The acid value was 98.0 mgKOH / g, and the weight average molecular weight (Mw) was 29000.

<(E) Synthesis of Dispersant A>
In a reaction vessel equipped with a gas inlet tube, thermometer, condenser, and stirrer,
Acetoacetoxyethyl methacrylate 300 parts ethyl acrylate 300 parts t-butyl acrylate 200 parts methyl methacrylate 150 parts methacrylic acid 50 parts were charged and replaced with nitrogen gas. Heat the reaction vessel to 80 ° C.,
60 parts of 3-mercapto-1,2-propanediol was added and reacted for 12 hours, and it was confirmed that 95% had reacted by solid content measurement (first step).

Next, the compound methoxypropyl acetate solution obtained in the first step (solid content 50%) 500 parts pyromellitic anhydride 21 parts Catalyst: 1,8-diazabicyclo- [5.4.0] -7-undecene 1 40 parts were charged and reacted at 120 ° C. for 7 hours. It was made to react until the acid anhydride of 98% or more was half-esterified by the measurement of an acid value (2nd process).

  The reaction solution was cooled and the solid content was adjusted with methoxypropyl acetate to obtain a 50% solid solution of Dispersant A. The obtained dispersant had an acid value of 72 KOH mg / g and a weight average molecular weight (Mw) of 6,500.

<Synthesis of basic derivatives>
After 50 parts of copper phthalocyanine as a pigment component was chlorosulfonated, it was reacted with 14 parts of N, N-dimethylaminopropylamine as an amine component to obtain 62 parts of a basic derivative.

<Dispersion of blue pigment>
Binder resin A (solid content 30%) 74 parts ε type copper phthalocyanine pigment: 12 parts of heliogen blue L-6700 F
Manufactured by BASF (CI Pigment Blue 15: 6)
Dispersant A 6 parts Basic derivative A mixture of 2 parts was stirred and mixed uniformly, then dispersed in a sand mill for 5 hours using a glass bead having a diameter of 1 mm, and then filtered through a 5 μm filter to obtain a blue pigment dispersion. Produced.

after that,
Pigment dispersion: previously prepared pigment dispersion 10 parts Photopolymerization initiator Initiator: Irgacure OXE-02 (manufactured by BASF) 2 parts
Oxime ester photoinitiator: ethanone, 1- [9-ethyl-6- (2-methylbenzoyl) -9H-carbazol-3-yl]-, 1- (0-acetyloxime))
Monomer: Aronix M-402 (manufactured by Toagosei) 18 parts
Dipentaerythritol hexaacrylate organic solvent: cyclohexanone 42 parts of a mixture was stirred and mixed uniformly, and then filtered through a 5 μm filter to obtain a blue colored composition 1 of Example 1.

<Colored pixel pattern formation>
The photosensitive resin composition is coated on a 10 cm × 10 cm glass substrate with a die coater so as to have a thickness of about 2.5 μm, and is left in an oven at 70 ° C. for 15 minutes to remove excess solvent. Dried and removed. A photomask having a stripe pattern of 20 μm was set at a distance of 150 μm from the coating film, and was irradiated with light at an exposure amount (based on 365 nm) of 50 mJ / cm ² , and then a 0.2% sodium carbonate aqueous solution. After developing at 27 ° C. using an alkali developer consisting of the above, the unexposed portion was removed, and then the substrate was heated at 230 ° C. for 30 minutes to form a colored layer.

  Instead of the binder resin A used in Example 1, the binder resin B shown below was synthesized. Further, instead of the dispersant A used in Example 1, a dispersant B shown below was synthesized.

<(B) Synthesis of Binder Resin B>
67 parts of propylene glycol monomethyl ether acetate, 33 parts of propylene glycol monomethyl ether were placed in a flask equipped with a stirrer, a dropping funnel, a condenser, a thermometer, and a gas introduction tube. next,
monomer:
11 parts of tricyclodecanyl methacrylate
Benzyl methacrylate 31 parts
1 part of perbutyl O (manufactured by NOF Corporation, t-butylperoxy 2-ethylhexanate) was added to 100 parts of a monomer mixture of 23 parts of methacrylic acid. This was dropped into the flask over 2 hours from the dropping funnel, and further stirred at 120 ° C. for 2 hours to obtain a copolymer. Next, replace the flask with air,
Glycidyl methacrylate 10 parts Triphenylphosphine 0.46 parts Methylhydroquinone 0.08 part was added to the above copolymer solution and the reaction was continued at 120 ° C. When the solid content acid value reached 150 KOHmg / g, the reaction was terminated. Then, 75 parts of propylene glycol monomethyl ether acetate and 5 parts of propylene glycol monomethyl ether were added to obtain a 30% solid solution of binder resin B. The weight average molecular weight (Mw) was 30000.

<Synthesis of (E) Dispersant B>
In a reaction vessel equipped with a gas inlet tube, thermometer, condenser, and stirrer,
Acetoacetoxyethyl methacrylate 200 parts ethyl acrylate 300 parts t-butyl acrylate 150 parts methyl methacrylate 100 parts methacrylic acid 2- (0- [1'-methylpropylideneamino] carboxyamino) ethyl
200 parts benzyl methacrylate 50 parts were charged and replaced with nitrogen gas. Heat the reaction vessel to 80 ° C.,
8 parts of 3-mercapto-1,2-propanediol was added and reacted for 12 hours. It was confirmed that 95% had reacted by the solid content measurement (first step).

Next, the compound obtained in the first step (50% solid content methoxypropyl acetate solution) 500 parts pyromellitic anhydride 21 parts catalyst: 1,8-diazabicyclo- [5.4.0] -7-undecene 1.40 parts were charged and reacted at 120 ° C. for 7 hours. It was made to react until the acid anhydride of 98% or more was half-esterified by the measurement of an acid value (2nd process). The reaction solution was cooled and the solid content was adjusted with methoxypropyl acetate to obtain a 50% solid solution of Dispersant B. The obtained dispersant had an acid value of 9 KOH mg / g and a weight average molecular weight (Mw) of 50,000.

  A blue colored composition 2 of Example 2 was obtained under the same conditions as in Example 1 except that the binder resin B and the dispersant B were used. Similarly, a colored pixel pattern was formed to form a colored layer.

Instead of the binder resin A used in Example 1, the binder resin C shown below was synthesized.

<(B) Synthesis of Binder Resin C>
In a flask equipped with a stirrer, dropping funnel, condenser, thermometer, gas inlet tube,
94.5 parts of methoxypropyl acetate was charged, stirred while replacing with nitrogen, and heated to 110 ° C. next,
monomer:
1 part of methacrylic acid
20 parts methyl acrylate
4-hydroxybutyl acrylate 15 parts
50 parts of benzyl methacrylate
Methyl methacrylate 14 parts initiator: V-601 (manufactured by Wako Pure Chemical Industries, Ltd.) 1.5 parts methoxypropyl acetate 3.5 parts mixed was added dropwise over 2 hours. After completion of the dropwise addition, the mixture was further reacted at 110 ° C. for 3 hours, and then initiator: V-601 (manufactured by Wako Pure Chemical Industries) 0.15 part methoxypropyl acetate mixed with 0.35 part was added, and further reacted at 110 ° C. for 1 hour. Then, this was diluted with methoxypropyl acetate to obtain a 30% solid solution of binder resin C. The acid value was 6.7 mgKOH / g, and the weight average molecular weight (Mw) was 30000.

  A blue colored composition 3 of Example 3 was obtained under the same conditions as in Example 1 except that the binder resin C was used. Similarly, a colored pixel pattern was formed to form a colored layer.

<Comparative Example 1>
Instead of the binder resin A used in Example 1, a binder resin D shown below was synthesized.

<(B) Binder resin D>
In a flask equipped with a stirrer, dropping funnel, condenser, thermometer, gas inlet tube,
94.5 parts of methoxypropyl acetate was charged, stirred while replacing with nitrogen, and heated to 105 ° C. next,
monomer:
1 part of methacrylic acid
20 parts of butyl acrylate
4-hydroxybutyl acrylate 1 part
50 parts of benzyl methacrylate
Methyl methacrylate 14 parts initiator: V-601 (manufactured by Wako Pure Chemical Industries) 1.5 parts methoxypropyl acetate 3.5 parts mixed was added dropwise over 3 hours. After completion of the dropwise addition, the mixture was further reacted at 105 ° C for 3 hours, and then initiator: V-601 (manufactured by Wako Pure Chemical Industries) 0.15 part methoxypropyl acetate 0.35 part mixed was added, and further reacted at 105 ° C for 1 hour. Then, this was diluted with methoxypropyl acetate to obtain a 30% solid solution of binder resin D. The acid value was 6.7 mgKOH / g, and the weight average molecular weight (Mw) was 50000.

  A blue colored composition 4 of Comparative Example 1 was obtained under the same conditions as in Example 1 except that the binder resin D was used. Similarly, a colored pixel pattern was formed to form a colored layer.

<Comparative Example 2>
Instead of the binder resin A used in Example 2, a binder resin E shown below was synthesized.

<(B) Binder resin E>
67 parts of propylene glycol monomethyl ether acetate, 33 parts of propylene glycol monomethyl ether were placed in a flask equipped with a stirrer, a dropping funnel, a condenser, a thermometer, and a gas introduction tube, and the mixture was stirred while purging with nitrogen and heated to 125 ° C. next,
For 100 parts of a monomer mixture consisting of 13 parts tricyclodecanyl methacrylate, 28 parts benzyl methacrylate, 27 parts methacrylic acid,
1 part of perbutyl O (t-butylperoxy 2-ethylhexanate manufactured by NOF Corporation) was added. This was dropped into the flask over 20 minutes from the dropping funnel, and further stirred at 125 ° C. for 1 hour to obtain a copolymer. Next, replace the flask with air,
Glycidyl methacrylate 10 parts Triphenylphosphine 0.51 part Methylhydroquinone 0.08 part was added to the above copolymer solution and the reaction was continued at 125 ° C. When the solid content acid value reached 200 KOHmg / g, the reaction was terminated. By adding 75 parts of propylene glycol monomethyl ether acetate and 5 parts of propylene glycol monomethyl ether, a 30% solid solution of binder resin E was obtained. The weight average molecular weight (Mw) was 5000.

  A blue colored composition 5 of Comparative Example 2 was obtained under the same conditions as in Example 2 except that the binder resin E was used. Similarly, a colored pixel pattern was formed to form a colored layer.

<Evaluation of colored layer>
<Development evaluation>
In the formation of the colored layer, the time until the unexposed portion was dissolved and developed was measured, and evaluation was performed according to the following criteria. The end of development was judged visually.
○: Development is completed in less than 70 seconds.
X: Development is not completed within 70 seconds.

<Evaluation of residue>
The obtained colored layer was observed with SEM (HITACHI S-4800),
○: No residue.
X: Residue generated Judged according to the above criteria.

  With respect to Examples 1 to 3 and Comparative Examples 1 and 2, evaluation of developability and evaluation of residues are performed and the results are shown.

In the colored layer using the colored photosensitive resin composition of the invention, generation of residues and deterioration of developability were not observed. On the other hand, when K = weight average molecular weight / acid value in Comparative Example 1, (B) K (binder resin) / (E) Dispersant K is 82.6632 and 80 or more colored photosensitive resin compositions. The development speed was slow and the productivity was poor.

In Comparative Example 2, a residue was generated in the colored photosensitive resin composition in which (B) K of binder resin / K of (E) dispersant was less than 0.0050.

  Accordingly, the colored photosensitive resin composition contains at least (A) a colorant, (B) a binder resin, (C) a polyfunctional monomer, (D) a photopolymerization initiator, (E) a dispersant, and (F) a solvent. When K = weight average molecular weight / acid value, and (B) K of the binder resin / K of the (E) dispersant is 0.0050 or more and less than 80, It was possible to provide a colored photosensitive resin composition and a color filter in which the residue and the development speed were not deteriorated.

DESCRIPTION OF SYMBOLS 1 ... Transparent substrate 2 ... Light-shielding film 3 ... Transparent coloring pixel 4 ... Protective film (overcoat)
10 Color filter

Claims (4)

A colored photosensitive resin composition comprising (A) a colorant, (B) a binder resin, (C) a polyfunctional monomer, (D) a photopolymerization initiator, (E) a dispersant, and (F) a solvent. ,
A value obtained by dividing the weight average molecular weight by the acid value is defined as a K value,
A colored photosensitive resin composition, wherein a value obtained by dividing the K value of the (B) binder resin by the K value of the (E) dispersant is 0.0050 or more and less than 80.   2. The colored photosensitive resin composition according to claim 1, wherein the (E) dispersant has a weight average molecular weight of 2000 to 60000 and an acid value of 3 to 200 mgKOH.   The colored photosensitive resin composition according to claim 1 or 2, wherein the binder resin (B) has a weight average molecular weight of 5,000 to 50,000 and an acid value of 10 to 150 mgKOH.   The color filter using the colored photosensitive resin composition as described in any one of Claims 1-3.