Colored photosensitive resin composition for red pixel, color filter and image display device

Abstract

The present invention relates to a colored photosensitive resin composition for red pixels, and a color filter and an image display device manufactured using the same, the colored photosensitive resin composition for red pixels comprising a colorant, an alkali-soluble resin, a photopolymerizable compound, a photopolymerization initiator, and a solvent, the colorant comprising a red pigment and an orange pigment, the orange pigment contains C.I. Pigment orange 72. The colored photosensitive resin composition for red pixels according to the present invention has excellent sensitivity, suppressed development stains, and excellent tinting strength, solvent resistance, straightness, and storage stability.

Description

Technical Field

[0001] The present invention relates to a colored photosensitive resin composition for red pixels, a color filter, and an image display device. More specifically, the present invention relates to a colored photosensitive resin composition for red pixels having excellent sensitivity, suppressed development stains, and excellent coloring power, solvent resistance, straightness, and storage stability, a color filter formed using the same, and an image display device including the above color filter. Background Art

[0002] Color filters are widely used in imaging elements, liquid crystal display devices (LCDs), etc., and their application range is expanding. A color filter is generally manufactured as follows: After a colored photosensitive resin composition containing colorants corresponding to each of red, green, and blue colors is uniformly coated on a substrate on which a black matrix pattern is formed, it is dried by heating to form a coating film, and the coating film is exposed and developed, and further heat-cured as needed. Such operations are repeated for each color to form pixels of each color.

[0003] Korean Patent Publication No. 10-2012-0112188 discloses a colored photosensitive resin composition for red pixels that uses a benzimidazolone pigment having high brightness and contrast as a colorant for red pixels.

[0004] However, in order to provide a high-quality color filter with high color reproducibility, it is necessary to develop a colored photosensitive resin composition for red pixels having a low pigment weight concentration (PWC), excellent sensitivity and pattern characteristics during exposure, and suppressed generation of development stains. Summary of the Invention

[0005] Problems to be Solved

[0006] An object of the present invention is to provide a colored photosensitive resin composition for red pixels having excellent sensitivity, suppressed development stains, and excellent coloring power, solvent resistance, straightness, and storage stability.

[0007] Another object of the present invention is to provide a color filter formed using the above colored photosensitive resin composition for red pixels.

[0008] Still another object of the present invention is to provide an image display device including the above color filter.

[0009] Means for Solving the Problems

[0010] On the one hand, the present invention provides a colored photosensitive resin composition for red pixels, which comprises a colorant, an alkali-soluble resin, a photopolymerizable compound, a photoinitiator, and a solvent. The colorant comprises a red pigment and an orange pigment, and the orange pigment comprises C.I. Pigment Orange 72.

[0011] In one embodiment of the present invention, the colorant may further comprise a yellow pigment.

[0012] In one embodiment of the present invention, the red pigment may be one or more selected from C.I. Pigment Red 177, 242, and 291.

[0013] In one embodiment of the present invention, the yellow pigment may be one or more selected from C.I. Pigment Yellow 138, 139, 150, and 231.

[0014] In one embodiment of the present invention, the alkali-soluble resin may comprise one or more of the repeating units represented by the following Chemical Formulas 1 to 4.

[0015] [Chemical Formula 1]

[0016]

[0017] [Chemical Formula 2]

[0018]

[0019] [Chemical Formula 3]

[0020]

[0021] [Chemical Formula 4]

[0022]

[0023] In the above formulas,

[0024] R 1 and R 2 are each independently hydrogen or methyl,

[0025] R 3 is a hydrogen atom or a residue of a carboxylic acid containing an acid anhydride-derived carboxylic acid,

[0026] R 4 is a hydrogen atom or methyl,

[0027] R 5 represents a hydrogen atom, an aliphatic hydrocarbon group having 1 to 20 carbon atoms which may have substituents, an aromatic hydrocarbon group which may have substituents, an aliphatic hydrocarbon group having 1 to 20 carbon atoms containing at least one heteroatom which may have substituents, or an aromatic hydrocarbon group containing at least one heteroatom which may have substituents.

[0028] R 6 represents an alicyclic hydrocarbon group having 3 to 10 carbon atoms which may have substituents or an aromatic hydrocarbon group which may have substituents.

[0029] n is 0 or 1.

[0030] In one embodiment of the present invention, the above-mentioned red pixel coloring photosensitive resin composition may further contain a thiol compound.

[0031] In one embodiment of the present invention, the above-mentioned thiol compound may contain a compound represented by the following Chemical Formula 5.

[0032] [Chemical Formula 5]

[0033]

[0034] In the above formula,

[0035] X represents an m-valent aliphatic or aromatic residue having 1 to 20 carbon atoms which may have substituents.

[0036] R 7 and R 8 each independently represent a hydrogen atom or an alkyl group having 1 to 10 carbon atoms.

[0037] R 9 represents a hydrogen atom.

[0038] R 10 represents an alkyl group having 1 to 10 carbon atoms.

[0039] n is an integer from 0 to 4.

[0040] m is an integer from 2 to 8.

[0041] On the other hand, the present invention provides a color filter formed using the above-mentioned red pixel coloring photosensitive resin composition.

[0042] In yet another aspect, the present invention provides an image display device characterized by including the above-mentioned color filter.

[0043] Advantages of the Invention

[0044] The red pixel coloring photosensitive resin composition of the present invention contains C.I. Pigment Orange 72 together with a red pigment, so that it has low PWC, excellent sensitivity, suppressed development stains, and excellent coloring power, solvent resistance, straightness, and storage stability. Detailed Description of the Invention

[0045] Hereinafter, the present invention will be described in more detail.

[0046] One embodiment of the present invention relates to a colored photosensitive resin composition for a red pixel, which comprises a colorant (A), an alkali-soluble resin (B), a photopolymerizable compound (C), a photopolymerization initiator (D), and a solvent (F). The colorant comprises a red pigment and an orange pigment, and the orange pigment comprises C.I. Pigment Orange 72.

[0047] Hereinafter, each component in the colored photosensitive resin composition for a red pixel according to one embodiment of the present invention will be described in detail.

[0048] Colorant (A)

[0049] In one embodiment of the present invention, the colorant (A) comprises a red pigment and an orange pigment, and the orange pigment comprises C.I. Pigment Orange 72.

[0050] The colored photosensitive resin composition for a red pixel according to one embodiment of the present invention can reduce PWC, suppress development stains, and improve pattern characteristics by containing C.I. Pigment Orange 72 together with a red pigment.

[0051] In one embodiment of the present invention, as the red pigment, red organic pigments and / or inorganic pigments generally used in the art can be cited.

[0052] As the red organic pigments and inorganic pigments, specifically, compounds classified as pigments in the Color Index (published by The Society of Dyers and Colourists) can be cited. More specifically, pigments with the following Color Index (C.I.) numbers can be cited, but are not necessarily limited thereto, and they can be used alone or in combination of two or more.

[0053] C.I. Pigment Red 9, 97, 105, 122, 123, 144, 149, 166, 168, 176, 177, 180, 192, 208, 215, 216, 224, 241, 242, 254, 255, 264, and 291.

[0054] Among the above-exemplified red pigments, from the viewpoints of improving coloring power and achieving high color reproducibility, one or more pigments selected from C.I. Pigment Red 177, 242, and 291 are preferably used.

[0055] In one embodiment of the present invention, in addition to C.I. Pigment Orange 72, the orange pigment may further comprise one or more selected from C.I. Pigment Orange 13, 31, 36, 38, 40, 42, 43, 51, 55, 59, 61, 64, 65, and 71.

[0056] In the red pixel - forming colored photosensitive resin composition according to an embodiment of the present invention, based on 100% by weight of the total coloring agent, the content of the above - mentioned red pigment can be 60 to 99.5% by weight, preferably 60 to 80% by weight, and the content of the above - mentioned C.I. Pigment Orange 72 can be 0.5 to 40% by weight, preferably 0.5 to 20% by weight. When each content is within the above - mentioned range, the PWC is low, development stains can be suppressed, and the pattern characteristics are excellent.

[0057] In one embodiment of the present invention, in addition to the red pigment and the orange pigment, the above - mentioned coloring agent may further contain a yellow pigment. Specifically, pigments with the following Color Index (C.I.) numbers can be used, but are not necessarily limited thereto, and they can be used alone or in combination of two or more.

[0058] C.I. Pigment Yellow 13, 20, 24, 31, 53, 83, 86, 93, 94, 109, 110, 117, 125, 129, 137, 138, 139, 147, 148, 150, 153, 154, 166, 173, 180, 185 and 231.

[0059] Among the above - exemplified yellow pigments, one or more pigments selected from C.I. Pigment Yellow 138, 139, 150 and 231 are preferably used.

[0060] In the red pixel - forming colored photosensitive resin composition of the present invention, based on 100% by weight of the total coloring agent, the content of the above - mentioned yellow pigment can be 40% by weight or less, preferably 5 to 30% by weight.

[0061] Within the scope not impairing the object of the present invention, the above - mentioned coloring agent may further contain organic pigments and / or inorganic pigments commonly used in the art.

[0062] Specific examples of the above - mentioned organic pigments include water - soluble azo pigments, insoluble azo pigments, phthalocyanine pigments, quinacridone pigments, isoindolinone pigments, isoindoline pigments, perylene pigments, pyrenone pigments, dioxazine pigments, anthraquinone pigments, dianthraquinonyl pigments, anthrapyrimidine pigments, anthanthrone pigments, indanthrone pigments, flavanthrone pigments, pyranthrone pigments, diketopyrrolopyrrole pigments, etc.

[0063] As the above - mentioned inorganic pigments, metal compounds such as metal oxides or metal complex salts can be cited. Specifically, metal oxides or composite metal oxides of metals such as iron, cobalt, aluminum, cadmium, lead, copper, titanium, magnesium, chromium, zinc, and antimony can be cited.

[0064] In particular, as the above pigments, pigments with the following Color Index (C.I.) numbers can be specifically used, but are not necessarily limited thereto.

[0065] C.I. Pigment Violet 14, 19, 23, 29, 32, 33, 36, 37 and 38;

[0066] C.I. Pigment Blue 15 (15:3, 15:4, 15:6, etc.), 21, 28, 60, 64 and 76;

[0067] C.I. Pigment Green 7, 10, 15, 25, 36, 47, 58, 59, 62 and 63;

[0068] C.I. Pigment Brown 28;

[0069] C.I. Pigment Black 1 and 7, etc.

[0070] The above pigments can be used individually or in combination of two or more.

[0071] Preferably, the above pigments are used as a pigment dispersion in which the particle sizes of the pigments are uniformly dispersed. As an example of a method for uniformly dispersing the particle sizes of the pigments, a method of performing dispersion treatment by adding a pigment dispersant can be cited, and a pigment dispersion in a state where the pigments are uniformly dispersed in a solution can be obtained according to the above method.

[0072] The above pigment dispersant is added for deflocculation and maintaining stability of the pigments. As specific examples of the pigment dispersant, surfactants such as cationic, anionic, nonionic, amphoteric, polyester-based, and polyamine-based surfactants can be cited, and they can be used individually or in combination of two or more.

[0073] In addition, it is preferable to contain an acrylate-based dispersant containing butyl methacrylate (BMA) or N,N-dimethylaminoethyl methacrylate (DMAEMA) (hereinafter, referred to as acrylate-based dispersant). As commercially available products of the above acrylate-based dispersants, DISPER BYK-2000, DISPER BYK-2001, DISPER BYK-2070 or DISPER BYK-2150, etc. can be cited, and the above acrylate-based dispersants can be used individually or mixed in combination of two or more.

[0074] The above-mentioned pigment dispersant may also be other resin-type pigment dispersants other than the above-mentioned acrylate-based dispersant. As the above-mentioned other resin-type pigment dispersants, known resin-type pigment dispersants can be cited, especially polyurethane, polycarboxylate represented by polyacrylate, unsaturated polyamide, polycarboxylic acid, (partial) amine salts of polycarboxylic acid, ammonium salts of polycarboxylic acid, alkylamine salts of polycarboxylic acid, polysiloxane, long-chain polyaminoamide phosphate, esters of polycarboxylic acid containing hydroxyl groups and their modified products, or oil-based dispersants such as amides or their salts formed by the reaction of polyester with free carboxyl groups and poly(lower alkyleneimine); water-soluble resins or water-soluble polymer compounds such as (meth)acrylic acid-styrene copolymer, (meth)acrylic acid-(meth)acrylate copolymer, styrene-maleic acid copolymer, polyvinyl alcohol or polyvinylpyrrolidone; polyester; modified polyacrylate; addition products of ethylene oxide / propylene oxide and phosphate esters, etc.

[0075] As commercial products of the above resin-type dispersants, for cationic resin dispersants, for example, products with the trade names of DISPER BYK-160, DISPER BYK-161, DISPER BYK-162, DISPER BYK-163, DISPER BYK-164, DISPER BYK-166, DISPER BYK-171, DISPER BYK-182, DISPER BYK-184 from BYK Chemie GmbH; products with the trade names of EFKA-44, EFKA-46, EFKA-47, EFKA-48, EFKA-4010, EFKA-4050, EFKA-4055, EFKA-4020, EFKA-4015, EFKA-4060, EFKA-4300, EFKA-4330, EFKA-4400, EFKA-4406, EFKA-4510, EFKA-4800 from BASF SE; products with the trade names of SOLSPERS-24000, SOLSPERS-32550, NBZ-4204 / 10 from Lubrizol Corporation; products with the trade names of HINOACT T-6000, HINOACT T-7000, HINOACT T-8000 from Kawaken Fine Chemicals Co., Ltd.; products with the trade names of AJISPUR PB-821, AJISPUR PB-822, AJISPUR PB-823 from Ajinomoto Co., Inc.; products with the trade names of FLORENE DOPA-17HF, FLORENE DOPA-15BHF, FLORENE DOPA-33, FLORENE DOPA-44 from Kyoeisha Chemical Co., Ltd., etc.

[0076] Other resin-based pigment dispersants other than the above acrylic dispersants can be used alone or in combination of two or more, or can be used in combination with acrylic dispersants.

[0077] With respect to 100 parts by weight of the pigment, the content of the above pigment dispersant is 5 to 60 parts by weight, preferably 15 to 50 parts by weight. If the content of the pigment dispersant is greater than 60 parts by weight, the viscosity may increase, and when it is less than 5 parts by weight, problems such as difficulty in micronizing the pigment or gelation after dispersion may occur.

[0078] In one embodiment of the present invention, the above colorant (A) may further contain dyes generally used in the art.

[0079] The above dyes can be used without limitation as long as they are soluble in organic solvents. Dyes that are both soluble in organic solvents and can ensure solubility in alkaline developer, solvent resistance, stability over time and other reliability are preferably used.

[0080] As the above dyes, they can be selected from acidic dyes having acidic groups such as sulfonic acid or carboxylic acid, salts of acidic dyes and nitrogen-containing compounds, sulfonamide bodies of acidic dyes, etc. and their derivatives. In addition, azo-based, xanthene-based, phthalocyanine-based acidic dyes and their derivatives can also be selected.

[0081] Preferably, the above dyes include compounds classified as dyes in the Color Index (published by the Society of Dyers and Colourists), or well-known dyes described in dyeing manuals (Color Dyeing Society).

[0082] With respect to 100% by weight of all solid components in the red pixel coloring photosensitive resin composition, the content of the above colorant (A) can be 10 to 75% by weight, preferably 15 to 70% by weight. When the colorant is included in the above range, there is a tendency that even when a thin film is formed, the color density of the pixel is sufficient, and the peeling property of the non-pixel part during development does not decrease and it is not easy to generate residues, so it is preferred.

[0083] In the present invention, the so-called solid components refer to the remaining components other than the solvent.

[0084] Alkali-soluble resin (B)

[0085] In one embodiment of the present invention, the above alkali-soluble resin (B) has reactivity and alkali solubility based on the action of light or heat, and any resin well-known in the art can be selected and used without particular limitation as long as it serves as a dispersion medium for solid components represented by the colorant and functions as a binder resin.

[0086] Specifically, the above alkali-soluble resin preferably contains one or more of the repeating units represented by the following Chemical Formulas 1 to 4.

[0087] [Chemical Formula 1]

[0088]

[0089] [Chemical Formula 2]

[0090]

[0091] [Chemical Formula 3]

[0092]

[0093] [Chemical Formula 4]

[0094]

[0095] In the above formulas,

[0096] R 1 and R 2 are each independently hydrogen or methyl,

[0097] R 3 is a hydrogen atom or a residue of a carboxylic acid containing an acid anhydride-derived carboxylic acid,

[0098] R 4 is a hydrogen atom or methyl,

[0099] R 5 represents a hydrogen atom, an aliphatic hydrocarbon group having 1 to 20 carbon atoms which may have a substituent, an aromatic hydrocarbon group which may have a substituent, an aliphatic hydrocarbon group having 1 to 20 carbon atoms containing at least one hetero atom which may have a substituent, or an aromatic hydrocarbon group containing at least one hetero atom which may have a substituent,

[0100] R 6 represents an alicyclic hydrocarbon group having 3 to 10 carbon atoms which may have a substituent or an aromatic hydrocarbon group which may have a substituent,

[0101] n is 0 or 1.

[0102] The acid anhydrides used in this specification include succinic anhydride, methylsuccinic anhydride, (2-dodecen-1-yl)succinic anhydride, phenylsuccinic anhydride, phthalic anhydride, maleic anhydride, citraconic anhydride, glutaric anhydride, 3,3-dimethylglutaric anhydride, itaconic anhydride, 3,4,5,6-tetrahydrophthalic anhydride, trimellitic anhydride, hexahydrophthalic anhydride, carbic anhydride, etc., but are not limited thereto. From the perspective of ease of reaction, as the above acid anhydrides, maleic anhydride, phthalic anhydride, trimellitic anhydride, succinic anhydride, hexahydrophthalic anhydride, and / or carbic anhydride are preferably used, and trimellitic anhydride, succinic anhydride, and / or hexahydrophthalic anhydride are particularly more preferred.

[0103] The aliphatic hydrocarbon group having 1 to 20 carbon atoms used in this specification may have a straight-chain (1 to 20 carbon atoms), branched-chain (3 to 20 carbon atoms), or alicyclic (3 to 20 carbon atoms) structure. For example, it may be an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, a cycloalkenyl group having 3 to 20 carbon atoms, or a cycloalkynyl group having 3 to 20 carbon atoms.

[0104] The aromatic hydrocarbon group used in this specification may be an aryl group having 6 to 20 carbon atoms, an arylalkyl group having 7 to 20 carbon atoms, or an alkylaryl group having 7 to 20 carbon atoms.

[0105] The aliphatic hydrocarbon group or aromatic hydrocarbon group used in this specification may contain at least one heteroatom.

[0106] The term "heteroatom" used in this specification may refer to an atom other than hydrogen and carbon. For example, it may include an oxygen atom, a nitrogen atom, and / or a sulfur atom.

[0107] For example, at least one carbon atom of the above aliphatic hydrocarbon group or aromatic hydrocarbon group may be substituted with a heteroatom or may further contain more than one heteroatom in addition to carbon atoms. For example, the above aliphatic hydrocarbon group or aromatic hydrocarbon group may contain at least one ester group, ether group, amine group, and / or thioether group.

[0108] As substituents of the above aliphatic hydrocarbon group and aromatic hydrocarbon group, alkoxy groups having 1 to 6 carbon atoms, hydroxyl groups, halogens, mercapto groups, etc. can be exemplified.

[0109] The above alicyclic hydrocarbon group having 3 to 10 carbon atoms may be, for example, a cycloalkyl group having 3 to 10 carbon atoms, a cycloalkenyl group having 3 to 10 carbon atoms, or a cycloalkynyl group having 3 to 10 carbon atoms.

[0110] As substituents of the above alicyclic hydrocarbon group having 3 to 10 carbon atoms, alkyl groups having 1 to 6 carbon atoms, alkoxy groups having 1 to 6 carbon atoms, hydroxyl groups, halogens, mercapto groups, etc. can be exemplified.

[0111] In one embodiment of the present invention, the repeating unit represented by the above Chemical Formula 1 may be replaced by the repeating unit represented by the following Chemical Formula 1a or may further include the repeating unit represented by the following Chemical Formula 1a.

[0112] [Chemical Formula 1a]

[0113]

[0114] The repeating unit represented by the above Chemical Formula 1 can be introduced, for example, using one or more selected from 3,4-epoxytricyclo[5.2.1.0 2,6 decane-8-yl acrylate, 3,4-epoxytricyclo[5.2.1.0 2,6 decane-8-yl methacrylate, 3,4-epoxytricyclo[5.2.1.0 2,6 decane-9-yl acrylate, and 3,4-epoxytricyclo[5.2.1.0 2,6 decane-9-yl methacrylate.

[0115] In one embodiment of the present invention, when R 3 is a hydrogen atom, the repeating unit represented by the above Chemical Formula 2 can be introduced by copolymerizing an ethylenically unsaturated monomer having a carboxyl group with other monomers having an unsaturated double bond and then reacting the copolymer thus produced with glycidyl (meth)acrylate.

[0116] When R 3 is a residue containing a carboxylic acid derived from an acid anhydride, it can be introduced by copolymerizing glycidyl (meth)acrylate with other monomers having an unsaturated double bond, reacting the copolymer thus produced with an ethylenically unsaturated monomer having a carboxyl group, and then reacting with an acid anhydride.

[0117] Examples of the ethylenically unsaturated monomer having a carboxyl group as described above include: monocarboxylic acids such as acrylic acid, methacrylic acid, and crotonic acid; dicarboxylic acids such as fumaric acid, mesaconic acid, and itaconic acid, and acid anhydrides of the above dicarboxylic acids; mono(meth)acrylates of polymers having a carboxyl group and a hydroxyl group at both ends such as ω-carboxypolycaprolactone mono(meth)acrylate, etc.

[0118] Examples of the other monomer having an unsaturated double bond as described above include: (meth)acrylic acid hydroxyalkyl ester compounds such as 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, 2-hydroxy-3-phenoxypropyl (meth)acrylate, etc.;

[0119] aromatic vinyl compounds such as styrene, vinyltoluene, α-methylstyrene, p-chlorostyrene, o-methoxystyrene, m-methoxystyrene, p-methoxystyrene, o-vinylbenzyl methyl ether, m-vinylbenzyl methyl ether, p-vinylbenzyl methyl ether, o-vinylbenzyl glycidyl ether, m-vinylbenzyl glycidyl ether, p-vinylbenzyl glycidyl ether, etc.;

[0120] (meth)acrylic acid alkyl ester compounds such as methyl (meth)acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, isopropyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, sec-butyl (meth)acrylate, tert-butyl (meth)acrylate, etc.;

[0121] alicyclic (meth)acrylate compounds such as cyclopentyl (meth)acrylate, cyclohexyl (meth)acrylate, 2-methylcyclohexyl (meth)acrylate, 2-dicyclopentyloxyethyl (meth)acrylate, isobornyl (meth)acrylate, etc.;

[0122] (meth)acrylic acid aryl esters such as phenyl (meth)acrylate, benzyl (meth)acrylate, etc.;

[0123] unsaturated oxetane compounds such as 3-(methacryloxymethyl)oxetane, 3-(methacryloxymethyl)-3-ethyloxetane, 3-(methacryloxymethyl)-2-trifluoromethyloxetane, 3-(methacryloxymethyl)-2-phenyloxetane, 2-(methacryloxymethyl)oxetane, 2-(methacryloxymethyl)-4-trifluoromethyloxetane, etc.;

[0124] carboxylic acid vinyl ester compounds such as vinyl acetate, vinyl propionate, etc.;

[0125] (meth)acrylonitrile, vinyl cyanide compounds such as α-chloroacrylonitrile, etc. They can be used alone or in combination of two or more.

[0126] In one embodiment of the present invention, the repeating unit represented by the above Chemical Formula 3 can be introduced using the compound represented by the following Chemical Formula 3a.

[0127] [Chemical Formula 3a]

[0128]

[0129] In the above formula,

[0130] R 5 is the same as defined in Chemical Formula 3.

[0131] In one embodiment of the present invention, the repeating unit represented by the above Chemical Formula 4 can be introduced using N-substituted maleimide compounds such as N-cyclohexyl maleimide, N-benzyl maleimide, N-phenyl maleimide, N-o-hydroxyphenyl maleimide, N-m-hydroxyphenyl maleimide, N-p-hydroxyphenyl maleimide, N-o-methylphenyl maleimide, N-m-methylphenyl maleimide, N-p-methylphenyl maleimide, N-o-methoxyphenyl maleimide, N-m-methoxyphenyl maleimide, and N-p-methoxyphenyl maleimide.

[0132] The alkali-soluble resin (B) according to one embodiment of the present invention can inhibit development stains and improve solvent resistance and pattern straightness by containing one or more of the repeating units represented by the above Chemical Formulas 1 to 4.

[0133] Relative to 100 mol% of the total repeating units constituting the alkali-soluble resin, the content of each of the repeating units represented by the above Chemical Formulas 1 to 4 can be 10 to 80 mol%, preferably 20 to 70 mol%.

[0134] The alkali-soluble resin (B) according to one embodiment of the present invention may further contain repeating units derived from an ethylenically unsaturated monomer having a carboxyl group to ensure developability.

[0135] In addition, the alkali-soluble resin according to one embodiment of the present invention may further contain repeating units derived from other unsaturated double bond-containing monomers other than the above monomers.

[0136] The method for producing the above copolymer is not particularly limited, and a conventionally known polymerization method can be used. Among the conventionally known polymerization methods, solution polymerization is preferred. In addition, the polymerization temperature or polymerization time varies depending on the type or ratio of the monomers introduced, the desired molecular weight and acid value of the alkali-soluble resin. For example, it can be polymerized at 60 to 130 °C for 1 to 10 hours.

[0137] If a solvent is used during the above polymerization, solvents commonly used in radical polymerization reactions can be employed. Specifically, tetrahydrofuran, dioxane, ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, ethyl acetate, butyl acetate, propylene glycol monomethyl ether acetate, 3-methoxybutyl acetate, methanol, ethanol, propanol, n-butanol, ethylene glycol monomethyl ether, propylene glycol monomethyl ether, toluene, xylene, ethylbenzene, chloroform, dimethyl sulfoxide, etc. can be used. These solvents can be used alone or in combination of two or more.

[0138] As the polymerization initiator used during the above polymerization, commonly used polymerization initiators can be added without particular limitation. Specifically, organic peroxides such as dicumyl peroxide, di-tert-butyl peroxide, benzoyl peroxide, tert-butyl peroxyisopropyl carbonate, tert-amyl peroxy-2-ethylhexanoate, tert-butyl peroxy-2-ethylhexanoate; and azo compounds such as 2,2'-azobis(isobutyronitrile), 2,2'-azobis(2,4-dimethylvaleronitrile), dimethyl 2,2'-azobis(2-methylpropionate) can be cited. They can be used alone or in combination of two or more.

[0139] A chain transfer agent can be used during the above polymerization to control the molecular weight or molecular weight distribution of the copolymer. As the above chain transfer agent, mercapto compounds such as n-dodecyl mercaptan, mercaptoacetic acid, methyl mercaptoacetate; and α-methylstyrene dimer, etc. can be used.

[0140] The acid value of the above alkali-soluble resin (B) is preferably 30 to 200 mgKOH / g. Here, the acid value is the amount (mg) of potassium hydroxide required to polymerize 1 g of the polymer, and is usually determined by titration with an aqueous potassium hydroxide solution. When the acid value of the alkali-soluble resin (B) is less than 30 mgKOH / g, it is difficult for the colored photosensitive resin composition to ensure sufficient development speed. When it is greater than 200 mgKOH / g, the adhesion to the substrate decreases and pattern short circuits are likely to occur.

[0141] In addition, an alkali-soluble resin having a polystyrene-converted weight average molecular weight (hereinafter, simply referred to as "weight average molecular weight") of 3,000 to 30,000 measured by gel permeation chromatography (GPC; using tetrahydrofuran as the eluent solvent) is preferred. If the weight average molecular weight of the alkali-soluble resin (B) is less than 3,000, the degree of curing is low and it is difficult to form a pattern, and the reliability such as heat resistance and solvent resistance may decrease. When it is greater than 30,000, the heat resistance decreases, the storage stability of the colored curable resin composition decreases, or the developability decreases and residues may be generated.

[0142] The molecular weight distribution [weight average molecular weight (Mw) / number average molecular weight (Mn)] of the alkali-soluble resin (B) is preferably from 1.5 to 6.0, more preferably from 1.8 to 4.0. If the molecular weight distribution [weight average molecular weight (Mw) / number average molecular weight (Mn)] is from 1.5 to 6.0, the developability is excellent, and thus it is preferred.

[0143] Based on 100% by weight of all the solid components in the colored photosensitive resin composition, the content of the above alkali-soluble resin (B) can be from 10 to 80% by weight, preferably from 10 to 70% by weight. When the alkali-soluble resin (B) is included within the above range, the solubility in the developer is sufficient and it is easy to form a pattern, and it prevents the film of the pixel portion in the exposed portion from decreasing during development and improves the peelability of the non-pixel portion, and thus it is preferred.

[0144] Photopolymerizable compound (C)

[0145] In one embodiment of the present invention, the above photopolymerizable compound (C) is a compound that can be polymerized by the action of the following photopolymerization initiator (D), and a monofunctional monomer, a difunctional monomer or a polyfunctional monomer can be used, and preferably a polyfunctional monomer having two or more functional groups can be used.

[0146] Specific examples of the above monofunctional monomer include nonylphenyl carbitol acrylate, 2-hydroxy-3-phenoxypropyl acrylate, 2-ethylhexyl carbitol acrylate, 2-hydroxyethyl acrylate or N-vinylpyrrolidone, etc., but are not limited thereto.

[0147] Specific examples of the above difunctional monomer include 1,6-hexanediol di(meth)acrylate, ethylene glycol di(meth)acrylate, neopentyl glycol di(meth)acrylate, triethylene glycol di(meth)acrylate, bis(acryloyloxyethyl) ether of bisphenol A or 3-methylpentanediol di(meth)acrylate, etc., but are not limited thereto.

[0148] Specific examples of the above polyfunctional monomer include trimethylolpropane tri(meth)acrylate, ethoxylated trimethylolpropane tri(meth)acrylate, propoxylated trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, ethoxylated dipentaerythritol hexa(meth)acrylate, propoxylated dipentaerythritol hexa(meth)acrylate or dipentaerythritol hexa(meth)acrylate, etc., but are not limited thereto.

[0149] Based on 100% by weight of all solid components in the colored photosensitive resin composition relative to the red pixels, the content of the photopolymerizable compound (C) can be 1 to 45% by weight, particularly 3 to 25% by weight. When the photopolymerizable compound (C) is included within the above range, the strength or smoothness of the pixel portion can be improved.

[0150] Photopolymerization initiator (D)

[0151] In one embodiment of the present invention, the photopolymerization initiator is a compound that can initiate the polymerization of the photopolymerizable compound (C) by exposure to radiation such as visible light, ultraviolet light, far ultraviolet light, electron beams, X-rays, etc. Representative examples of such photopolymerization initiators include acetophenone-based compounds, benzophenone-based compounds, imidazole-based compounds, triazine-based compounds, oxime-based compounds, and thioxanthone-based compounds. In the present invention, the photopolymerization initiator can be used alone or in combination of two or more, and preferably one or more oxime-based compounds are used.

[0152] Specific examples of the acetophenone-based compounds include diethoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, benzil dimethyl ketal, 2-hydroxy-1-[4-(2-hydroxyethoxy)phenyl]-2-methylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1-(4-methylphenylthio)-2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)butan-1-one, 2-hydroxy-2-methyl-1-[4-(1-methylethenyl)phenyl]propan-1-one, 2-(4-methylbenzyl)-2-(dimethylamino)-1-(4-morpholinophenyl)butan-1-one, etc.

[0153] Examples of the benzophenone-based compounds include benzophenone, methyl o-benzoylbenzoate, 4-phenylbenzophenone, 4-benzoyl-4'-methyldiphenyl sulfide, 3,3',4,4'-tetra(tert-butylperoxycarbonyl)benzophenone, 2,4,6-trimethylbenzophenone, etc.

[0154] As specific examples of the above-mentioned benzimidazole compounds, 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetraphenylbenzimidazole, 2,2'-bis(2,3-dichlorophenyl)-4,4',5,5'-tetraphenylbenzimidazole, 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetra(alkoxyphenyl)benzimidazole, 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetra(trialkoxyphenyl)benzimidazole, 2,2-bis(2,6-dichlorophenyl)-4,4',5,5'-tetraphenyl-1,2'-benzimidazole, or benzimidazole compounds in which the phenyl groups at the 4,4',5,5' positions are substituted with alkoxycarbonyl groups, etc. can be cited. Among them, 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetraphenylbenzimidazole, 2,2'-bis(2,3-dichlorophenyl)-4,4',5,5'-tetraphenylbenzimidazole, and 2,2-bis(2,6-dichlorophenyl)-4,4',5,5'-tetraphenyl-1,2'-benzimidazole are preferably used.

[0155] As specific examples of the above-mentioned triazine compounds, 2,4-bis(trichloromethyl)-6-(4-methoxyphenyl)-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-(4-methoxynaphthyl)-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-piperonyl-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-(4-methoxystyryl)-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-[2-(5-methylfuran-2-yl)ethylidene]-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-[2-(furan-2-yl)ethylidene]-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-[2-(4-diethylamino-2-methylphenyl)ethylidene]-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-[2-(3,4-dimethoxyphenyl)ethylidene]-1,3,5-triazine, etc. can be cited.

[0156] As the above-mentioned oxime compounds, 1-[4-(phenylthio)phenyl]-1,2-octanedione-2-(O-benzoyl oxime), 1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]-ethanone-1-(O-acetyl oxime), etc.

[0157] As the above-mentioned thioxanthone compounds, for example, 2-isopropylthioxanthone, 2,4-diethylthioxanthone, 2,4-dichlorothioxanthone, 1-chloro-4-propoxythioxanthone, etc.

[0158] In addition, the above-mentioned photopolymerization initiator (D) can be used in combination with a photopolymerization auxiliary agent (d1) to improve the sensitivity of the colored photosensitive resin composition for red pixels of the present invention. By containing the photopolymerization auxiliary agent (d1), the colored photosensitive resin composition for red pixels of the present invention can further improve the sensitivity and thus improve the productivity.

[0159] As the above-mentioned photopolymerization auxiliary agent (d1), it is preferable to use one or more compounds selected from the group consisting of, for example, amine compounds, carboxylic acid compounds, and organic sulfur compounds having a mercapto group.

[0160] As the above-mentioned amine compounds, specifically, aliphatic amine compounds such as triethanolamine, methyldiethanolamine, and triisopropanolamine can be used; aromatic amine compounds such as methyl 4-dimethylaminobenzoate, ethyl 4-dimethylaminobenzoate, isopentyl 4-dimethylaminobenzoate, 2-ethylhexyl 4-dimethylaminobenzoate, 2-dimethylaminoethyl benzoate, N,N-dimethyl-p-toluidine, 4,4'-bis(dimethylamino)benzophenone (commonly known as: Michler's ketone), and 4,4'-bis(diethylamino)benzophenone can be used. Aromatic amine compounds are particularly preferably used.

[0161] As the above-mentioned carboxylic acid compounds, aromatic heteroaetic acids are preferred, and specifically, phenylthioacetic acid, methylphenylthioacetic acid, ethylphenylthioacetic acid, methylethylphenylthioacetic acid, dimethylphenylthioacetic acid, methoxyphenylthioacetic acid, dimethoxyphenylthioacetic acid, chlorophenylthioacetic acid, dichlorophenylthioacetic acid, N-phenylglycine, phenoxyacetic acid, naphthylthioacetic acid, N-naphthylglycine, naphthoxyacetic acid, etc. can be cited.

[0162] Specific examples of the above-mentioned organic sulfur compounds having a mercapto group include 2-mercaptobenzothiazole, 1,4-bis(3-mercaptobutyryloxy)butane, 1,3,5-tris(3-mercaptobutoxyethyl)-1,3,5-triazine-2,4,6(1H,3H,5H)-trione, trimethylolpropane tris(3-mercaptopropionate), pentaerythritol tetra(3-mercaptobutyrate), pentaerythritol tetra(3-mercaptopropionate), dipentaerythritol hexa(3-mercaptopropionate), tetraethylene glycol bis(3-mercaptopropionate), etc.

[0163] Based on 100 parts by weight of the total amount of the above alkali-soluble resin (B) and the above photopolymerizable compound (C), the content of the above photopolymerization initiator (D) can be 0.1 to 40 parts by weight, preferably 1 to 30 parts by weight. When the photopolymerization initiator (D) is included within the above range, the red pixel-colored photosensitive resin composition of the present invention has high sensitivity and the exposure time is shortened, so the productivity is improved, and high resolution can be maintained, so it is preferred. In addition, the strength of the pixel portion formed using the composition under the above conditions and the smoothness of the surface of the pixel portion can be improved.

[0164] Based on 100 parts by weight of the total amount of the above photopolymerization initiator (D), the content of the above photopolymerization auxiliary agent (d1) can be 10 to 100 parts by weight, preferably 20 to 100 parts by weight. When the amount of the above photopolymerization auxiliary agent (d1) is less than 10 parts by weight, the sensitivity reduction caused by the dye cannot be overcome, and short circuits of the pattern are likely to occur in the development process.

[0165] In addition, when the above photopolymerization auxiliary agent (d1) is further used, based on 100 parts by weight of the total amount of the above alkali-soluble resin (B) and the above photopolymerizable compound (C), the content of the above photopolymerization auxiliary agent (d1) can be 0.1 to 40 parts by weight, preferably 1 to 30 parts by weight. When the above photopolymerization auxiliary agent (d1) is included within the above range, the sensitivity of the red pixel-colored photosensitive resin composition can be further improved, and the productivity of the color filter formed using the above composition can be improved.

[0166] Thiol compound (E)

[0167] In one embodiment of the present invention, the above thiol compound (E) is a component that plays a role in improving the degree of thermal curing, and is a compound having one or more secondary thiol groups in the molecule.

[0168] The red pixel-colored photosensitive resin composition according to one embodiment of the present invention can improve the sensitivity and solve the problem of reduced storage stability that occurs when using a compound having a primary thiol group by using a compound having a secondary thiol group as a thermal curing agent.

[0169] The secondary thiol group used in this specification refers to a thiol group having a structure in which two of the hydrogens bonded to the carbon atom bonded to the thiol group are substituted.

[0170] Specifically, the above thiol compound can be a compound represented by the following Chemical Formula 5.

[0171] [Chemical Formula 5]

[0172]

[0173] In the above formula,

[0174] X represents an m-valent aliphatic or aromatic residue having 1 to 20 carbon atoms which may have substituents,

[0175] R 7 and R 8 each independently represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms,

[0176] R 9 represents a hydrogen atom,

[0177] R 10 represents an alkyl group having 1 to 10 carbon atoms,

[0178] n is an integer from 0 to 4,

[0179] m is an integer from 2 to 8.

[0180] The m-valent aliphatic residue used in this specification may have a straight-chain (1 to 20 carbon atoms), branched-chain (3 to 20 carbon atoms) or alicyclic (3 to 20 carbon atoms) structure and may contain heteroatoms.

[0181] For example, the above m-valent aliphatic residues include a 4-valent residue derived from pentaerythritol, a 3-valent residue derived from trimethylolpropane, a 2-valent butylene group or a substituent represented by the following Chemical Formula 6, etc., but are not limited thereto.

[0182] [Chemical Formula 6]

[0183]

[0184] The alkyl group having 1 to 10 carbon atoms used in this specification refers to a monovalent hydrocarbon group having a straight-chain or branched-chain structure composed of 1 to 10 carbon atoms. For example, it includes methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, n-hexyl, etc., but is not limited thereto.

[0185] For example, the above thiol compound (E) includes pentaerythritol tetra(3-mercaptobutyrate), trimethylolpropane tri(3-mercaptobutyrate), 1,4-bis(3-mercaptobutyryloxy)butane, 1,3,5-tris[2-(3-mercaptobutyryloxy)ethyl]-1,3,5-triazine-2,4,6(1H,3H,5H)-trione, etc., but is not limited thereto.

[0186] In one embodiment of the present invention, relative to 100% by weight of all solid components in the colored photosensitive resin composition for red pixels, the content of the thiol compound may be 0.1 to 3% by weight, preferably 0.5 to 2.5% by weight. When the thiol compound is included within the above range, the thermal reaction temperature can be reduced and the sensitivity can be improved during exposure.

[0187] Solvent (F)

[0188] In one embodiment of the present invention, as long as the solvent (F) is effective in dissolving other components contained in the colored photosensitive resin composition for red pixels, solvents commonly used in ordinary colored photosensitive resin compositions for red pixels can be used without particular limitation. Particularly preferred are ethers, aromatic hydrocarbons, ketones, alcohols, esters, amides, etc.

[0189] Specific examples of the solvent (F) include: ethylene glycol monoalkyl ethers such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, and ethylene glycol monobutyl ether; diethylene glycol dialkyl ethers such as diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol dipropyl ether, and diethylene glycol dibutyl ether; ethylene glycol alkyl ether acetates such as methyl cellosolve acetate and ethyl cellosolve acetate; alkylene glycol alkyl ether acetates such as propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, propylene glycol monopropyl ether acetate, methoxybutyl acetate, and methoxypentyl acetate; aromatic hydrocarbons such as benzene, toluene, xylene, and mesitylene; ketones such as methyl ethyl ketone, acetone, methyl amyl ketone, methyl isobutyl ketone, and cyclohexanone; alcohols such as ethanol, propanol, butanol, hexanol, cyclohexanol, ethylene glycol, and glycerol; esters such as ethyl lactate, butyl lactate, ethyl 3-ethoxypropionate, and methyl 3-methoxypropionate; cyclic esters such as γ-butyrolactone, etc.

[0190] From the aspects of coatability and drying property, the solvent (F) is preferably an organic solvent with a boiling point of 100°C to 200°C, and more preferably propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, cyclohexanone, ethyl lactate, butyl lactate, ethyl 3-ethoxypropionate, methyl 3-methoxypropionate, etc. can be used.

[0191] The solvents (F) exemplified above can be used alone or in combination of two or more.

[0192] Based on the total weight of the colored photosensitive resin composition for red pixels, the content of the solvent (F) may be 20 to 90% by weight, preferably 20 to 70% by weight. When the solvent (F) is included within the above range, the coatability can be improved when coating is performed using coating devices such as a roll coater, a spin coater, a slit spin coater, a slit coater (sometimes also called a die coater), an inkjet printer, etc.

[0193] Additive (G)

[0194] The red pixel color photosensitive resin composition of the present invention may optionally be used in combination with additives such as other polymer compounds, curing agents, surfactants, adhesion promoters, antioxidants, ultraviolet absorbers, and anti-caking agents as needed.

[0195] Specific examples of the above other polymer compounds include curable resins such as epoxy resins and maleimide resins, and thermoplastic resins such as polyvinyl alcohol, polyacrylic acid, polyethylene glycol monoalkyl ether, polyfluoroalkyl acrylate, polyester, and polyurethane.

[0196] The above curing agent is used to achieve deep curing and improve mechanical strength. Specific examples of the curing agent include epoxy compounds, polyfunctional isocyanate compounds, melamine compounds, and oxetane compounds.

[0197] Specific examples of the epoxy compound among the above curing agents include bisphenol A epoxy resin, hydrogenated bisphenol A epoxy resin, bisphenol F epoxy resin, hydrogenated bisphenol F epoxy resin, novolak type epoxy resin, other aromatic epoxy resins, alicyclic epoxy resins, glycidyl ester resins, glycidyl amine resins, or brominated derivatives of these epoxy resins, aliphatic, alicyclic or aromatic epoxy compounds other than epoxy resins and their brominated derivatives, butadiene (co)polymer epoxides, isoprene (co)polymer epoxides, (meth)acrylic acid glycidyl ester (co)polymers, and tris glycidyl isocyanurate.

[0198] Specific examples of the oxetane compound among the above curing agents include carbonate bisoxetane, xylene bisoxetane, adipate bisoxetane, terephthalate bisoxetane, and cyclohexanedicarboxylate bisoxetane.

[0199] The above-exemplified curing agents may be used alone or in combination of two or more.

[0200] The above curing agent may be used in combination with a co-curing compound that can cause ring-opening polymerization of the epoxy group of the epoxy compound and the oxetane skeleton of the oxetane compound together with the curing agent. Examples of the co-curing compound include polycarboxylic acids, polycarboxylic anhydrides, and acid generators. The above polycarboxylic anhydrides can use commercially available epoxy resin curing agents. Specific examples of the above epoxy resin curing agents include ADEKA HARDENER EH-700 (trade name, manufactured by ADEKA Corporation), RIKACID HH (trade name, manufactured by Shin Nippon Rika Co., Ltd.), and MH-700 (trade name, manufactured by Shin Nippon Rika Co., Ltd.).

[0201] The above surfactant can be used to further improve the film-forming property of the photosensitive resin composition, and preferably, a fluorine-based surfactant or a silicone-based surfactant can be used, etc.

[0202] Examples of the above silicone-based surfactants include, as commercially available products, DC3PA, DC7PA, SH11PA, SH21PA, SH8400, etc. of Dow Corning Toray Silicone Co., Ltd., and TSF-4440, TSF-4300, TSF-4445, TSF-4446, TSF-4460, TSF-4452, etc. of GE Toshiba Silicones Co., Ltd. Examples of the above fluorine-based surfactants include, as commercially available products, MEGAFACE F-470, F-471, F-475, F-482, F-489, etc. of Dainippon Ink and Chemicals, Inc. The surfactants exemplified above can be used alone or in combination of two or more.

[0203] Specific examples of the above adhesion promoter include vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris(2-methoxyethoxy)silane, N-(2-aminoethyl)-3-aminopropylmethyldimethoxysilane, N-(2-aminoethyl)-3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 3-chloropropylmethyldimethoxysilane, 3-chloropropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-mercaptopropyltrimethoxysilane, 3-isocyanatepropyltrimethoxysilane, 3-isocyanatepropyltriethoxysilane, etc. The adhesion promoters exemplified above can be used alone or in combination of two or more. Relative to 100% by weight of the total solid content of the red pixel-colored photosensitive resin composition, the content of the above adhesion promoter can usually be 0.01 to 10% by weight, preferably 0.05 to 2% by weight.

[0204] Specific examples of the above antioxidant include 2,2'-thiobis(4-methyl-6-tert-butylphenol), 2,6-di-tert-butyl-4-methylphenol, etc.

[0205] Specific examples of the above ultraviolet absorber include 2-(3-tert-butyl-2-hydroxy-5-methylphenyl)-5-chlorobenzotriazole, alkoxydibenzophenone, etc.

[0206] Specific examples of the above anticoagulant include sodium polyacrylate, etc.

[0207] The red pixel-colored photosensitive resin composition according to one embodiment of the present invention can be produced, for example, by the following method.

[0208] First, mix the pigment and the solvent in the above coloring agent, and use a bead mill or the like to disperse it until the average particle size of the pigment becomes 0.2 μm or less. At this time, a pigment dispersant, a part or all of an alkali-soluble resin, or a dye may be mixed and dissolved or dispersed together with the solvent as needed. Add the remaining alkali-soluble resin, photoinitiator, photopolymerizable compound, and additive to the above-mentioned dispersed liquid after mixing, and further add a solvent as needed to reach a predetermined concentration, whereby the colored photosensitive resin composition for red pixels of the present invention can be manufactured.

[0209] One embodiment of the present invention relates to a color filter formed using the above-mentioned colored photosensitive resin composition for red pixels. The color filter of one embodiment of the present invention is characterized by including a colored layer formed by coating the above-mentioned colored photosensitive resin composition for red pixels on a substrate and performing exposure and development in a predetermined pattern.

[0210] Hereinafter, a method for forming a pattern using the colored photosensitive resin composition for red pixels of the present invention will be described in detail.

[0211] The method for forming a pattern using the colored photosensitive resin composition for red pixels of the present invention can use methods well-known in the art, and generally includes: a coating step, an exposure step, and a removal step. The colored photosensitive resin composition for red pixels of the present invention is coated on a substrate, and a pattern is formed by performing photocuring and development, whereby it can be used as a colored pixel (colored image).

[0212] Specifically, using an appropriate method such as spin coating or slit coating, the above-mentioned colored photosensitive resin composition for red pixels is coated on a glass substrate without coating any substance or on a glass substrate coated with SiNx (protective film) with a thickness of After coating, light is irradiated to form a pattern required for the color filter. After irradiating light, if the coated layer is treated with an alkali developer, the unirradiated part of the coated layer dissolves, forming a pattern required for the color filter. Such a process is repeatedly performed according to the number of required R, G, and B colors, whereby a color filter having a desired pattern can be obtained. In addition, the image pattern obtained by development in the above process is reheated or irradiated with actinic rays to cure it, which can further improve crack resistance, solvent resistance, etc.

[0213] One embodiment of the present invention relates to an image display device including the above color filter.

[0214] The color filter of the present invention can be applied not only to a general liquid crystal display device (LCD), but also to various image display devices such as an electroluminescent display device (EL), a plasma display device (PDP), a field emission display device (FED), and an organic light-emitting element (OLED).

[0215] The image display device of the present invention includes a configuration known in the art in addition to the above color filter.

[0216] The image display device according to an embodiment of the present invention may further include a color filter including a red pattern layer containing red quantum dot particles, a green pattern layer containing green quantum dot particles, and a blue pattern layer containing blue quantum dot particles in addition to the above color filter. In this case, the light emitted from the light source applied in the image display device is not particularly limited, but from the aspect of more excellent color reproducibility, it is preferably possible to use a light source that emits blue light.

[0217] The image display device according to an embodiment of the present invention may further include a color filter including only two color pattern layers among the red pattern layer, the green pattern layer, and the blue pattern layer in addition to the above color filter. In this case, the color filter further includes a transparent pattern layer that does not contain quantum dot particles. In the case of including only two color pattern layers, it is possible to use a light source that emits light having a wavelength of the remaining color that is not included. For example, in the case of including only the red pattern layer and the green pattern layer, it is possible to use a light source that emits blue light. In such a case, the red quantum dot particles emit red light, the green quantum dot particles emit green light, and the transparent pattern layer directly transmits the blue light to present blue.

[0218] Hereinafter, the present invention will be described more specifically by way of examples, comparative examples, and experimental examples. It is obvious to those skilled in the art that these examples, comparative examples, and experimental examples are only for explaining the present invention, and the scope of the present invention is not limited by them.

[0219] Production Example 1: Production of Pigment Dispersion A-1

[0220] After mixing 12 parts by weight of C.I. Pigment Orange 72 as a colorant, 5 parts by weight of a dispersant (BYKL PN-6919, BYK) (in terms of solid content), and 83 parts by weight of propylene glycol monomethyl ether acetate, 300 parts by weight of 0.2 mm zirconia beads were added and mixed and dispersed to obtain Pigment Dispersion A-1.

[0221] Production Example 2: Production of Pigment Dispersion A-2

[0222] 16 parts by weight of C.I. Pigment Red 177 as a colorant, 5 parts by weight of a dispersant (BYKLPN-6919, BYK) (in terms of solid content), and 79 parts by weight of propylene glycol monomethyl ether acetate were mixed and then put into 300 parts by weight of 0.2 mm zirconia beads for mixing and dispersion to obtain Pigment Dispersion Liquid A-2.

[0223] Production Example 3: Production of Pigment Dispersion Liquid A-3

[0224] 14 parts by weight of C.I. Pigment Red 242 as a colorant, 5 parts by weight of a dispersant (BYKLPN-6919, BYK) (in terms of solid content), and 81 parts by weight of propylene glycol monomethyl ether acetate were mixed and then put into 300 parts by weight of 0.2 mm zirconia beads for mixing and dispersion to obtain Pigment Dispersion Liquid A-3.

[0225] Production Example 4: Production of Pigment Dispersion Liquid A-4

[0226] 14 parts by weight of C.I. Pigment Red 291 as a colorant, 5 parts by weight of a dispersant (BYKLPN-6919, BYK) (in terms of solid content), and 81 parts by weight of propylene glycol monomethyl ether acetate were mixed and then put into 300 parts by weight of 0.2 mm zirconia beads for mixing and dispersion to obtain Pigment Dispersion Liquid A-4.

[0227] Production Example 5: Production of Pigment Dispersion Liquid A-5

[0228] 12 parts by weight of C.I. Pigment Yellow 138 as a colorant, 5 parts by weight of a dispersant (BYKLPN-6919, BYK) (in terms of solid content), and 83 parts by weight of propylene glycol monomethyl ether acetate were mixed and then put into 300 parts by weight of 0.2 mm zirconia beads for mixing and dispersion to obtain Pigment Dispersion Liquid A-5.

[0229] Production Example 6: Production of Pigment Dispersion Liquid A-6

[0230] 16 parts by weight of C.I. Pigment Yellow 139 as a colorant, 5 parts by weight of a dispersant (BYKLPN-6919, BYK) (in terms of solid content), and 79 parts by weight of propylene glycol monomethyl ether acetate were mixed and then put into 300 parts by weight of 0.2 mm zirconia beads for mixing and dispersion to obtain Pigment Dispersion Liquid A-6.

[0231] Production Example 7: Production of Pigment Dispersion Liquid A-7

[0232] 12 parts by weight of C.I. Pigment Yellow 150 as a colorant, 5 parts by weight of a dispersant (BYKLPN-6919, BYK) (in terms of solid content), and 83 parts by weight of propylene glycol monomethyl ether acetate were mixed, and then 300 parts by weight of 0.2 mm zirconia beads were added for mixing and dispersion to obtain Pigment Dispersion A-7.

[0233] Production Example 8: Production of Pigment Dispersion A-8

[0234] 12 parts by weight of C.I. Pigment Yellow 231 as a colorant, 5 parts by weight of a dispersant (BYKLPN-6919, BYK) (in terms of solid content), and 83 parts by weight of propylene glycol monomethyl ether acetate were mixed, and then 300 parts by weight of 0.2 mm zirconia beads were added for mixing and dispersion to obtain Pigment Dispersion A-8.

[0235] Production Example 9: Production of Pigment Dispersion A-9

[0236] 12 parts by weight of C.I. Pigment Orange 38 as a colorant, 5 parts by weight of a dispersant (BYKLPN-6919, BYK) (in terms of solid content), and 83 parts by weight of propylene glycol monomethyl ether acetate were mixed, and then 300 parts by weight of 0.2 mm zirconia beads were added for mixing and dispersion to obtain Pigment Dispersion A-9.

[0237] Synthesis Example 1: Synthesis of Alkali-Soluble Resin B-1

[0238] 120 parts by weight of propylene glycol monomethyl ether acetate and 80 parts by weight of propylene glycol monomethyl ether were placed in a flask equipped with a stirrer, a thermometer, a reflux condenser, a dropping funnel, and a nitrogen inlet tube, and the inside of the flask was purged with nitrogen.

[0239] Next, 15 parts by weight of acrylic acid, a mixture of 3,4-epoxytricyclo[5.2.1.0 2.6 decane-8-yl acrylate and 3,4-epoxytricyclo[5.2.1.0 2.6 decane-9-yl acrylate (containing 50:50 in molar ratio) [trade name "E-DCPA", Daicel Corporation] 70 parts by weight and 15 parts by weight of 2,2'-azobisisobutyronitrile (Wako Pure Chemical Industries, Ltd.) were added and stirred.

[0240] Then, the temperature of the reaction solution was raised to 85 °C and reacted for 6 hours. The acid value of the thus synthesized alkali-soluble resin B-1 was 100 mg KOH / g, and the weight-average molecular weight (Mw) measured by GPC was about 8,200.

[0241] Synthesis Example 2: Synthesis of Alkali-Soluble Resin B-2

[0242] Into a flask equipped with a stirrer, a thermometer, a reflux condenser, a dropping funnel, and a nitrogen inlet tube, 180 parts by weight of propylene glycol monomethyl ether acetate and 20 parts by weight of propylene glycol monomethyl ether were placed, and the inside of the flask was purged with nitrogen.

[0243] Next, after heating the flask to 90 °C, 50 parts by weight of methacrylic acid, 50 parts by weight of benzyl methacrylate, and 5 parts by weight of 2,2'-azobisisobutyronitrile (Wako) were added and polymerized for 6 hours.

[0244] After cooling the flask to room temperature and replacing the atmosphere in the flask from nitrogen to air, 30 parts by weight of glycidyl methacrylate and 5 parts by weight of n-dodecyl mercaptan were added, and the temperature of the reaction solution was raised to 80 °C and reacted for 12 hours to obtain an alkali-soluble resin B-2.

[0245] The acid value of the alkali-soluble resin B-2 synthesized in this way was 120 mg KOH / g, and the weight-average molecular weight (Mw) measured by GPC was about 7,500.

[0246] Synthesis Example 3: Synthesis of alkali-soluble resin B-3

[0247] Into a flask equipped with a stirrer, a thermometer, a reflux condenser, a dropping funnel, and a nitrogen inlet tube, 180 parts by weight of propylene glycol monomethyl ether acetate and 20 parts by weight of propylene glycol monomethyl ether were placed, and the inside of the flask was purged with nitrogen.

[0248] Next, after heating the flask to 90 °C, 50 parts by weight of methacrylic acid, 10 parts by weight of benzyl maleimide, 40 parts by weight of cyclohexyl methacrylate, and 5 parts by weight of 2,2'-azobisisobutyronitrile (Wako) were added and polymerized for 6 hours.

[0249] After cooling the flask to room temperature and replacing the atmosphere in the flask from nitrogen to air, 30 parts by weight of glycidyl methacrylate and 5 parts by weight of n-dodecyl mercaptan were added, and the temperature of the reaction solution was raised to 80 °C and reacted for 12 hours to obtain an alkali-soluble resin B-3.

[0250] The acid value of the alkali-soluble resin B-3 synthesized in this way was 130 mg KOH / g, and the weight-average molecular weight (Mw) measured by GPC was about 8,500.

[0251] Synthesis Example 4: Synthesis of alkali-soluble resin B-4

[0252] Into a flask equipped with a stirrer, a thermometer, a reflux condenser, a dropping funnel, and a nitrogen inlet tube, 200 parts by weight of propylene glycol monomethyl ether acetate were placed, and the inside of the flask was purged with nitrogen.

[0253] Next, after heating the flask to 90°C, 10 parts by weight of methyl 2-((allyloxy)methyl)acrylate, 40 parts by weight of methacrylic acid, 10 parts by weight of methyl methacrylate, 40 parts by weight of cyclohexyl methacrylate, and 5 parts by weight of 2,2'-azobisisobutyronitrile (manufactured by Wako) were added. The temperature of the reaction vessel was adjusted to 90°C and allowed to stand for 1 hour, and then the temperature was raised to 110°C. The reaction was carried out at 110°C for 3 hours to obtain an alkali-soluble resin B-4.

[0254] The acid value of the alkali-soluble resin B-4 synthesized in this way was 80 mgKOH / g, and the weight-average molecular weight (Mw) measured by GPC was approximately 7,000.

[0255] Synthesis Example 5: Synthesis of alkali-soluble resin B-5

[0256] 200 parts by weight of propylene glycol monomethyl ether acetate was placed in a flask equipped with a stirrer, a thermometer, a reflux condenser, a dropping funnel, and a nitrogen inlet tube, and the inside of the flask was purged with nitrogen.

[0257] Next, after heating the flask to 90°C, 20 parts by weight of methyl 2-((allyloxy)methyl)acrylate, 15 parts by weight of methacrylic acid, 25 parts by weight of methyl methacrylate, 40 parts by weight of cyclohexyl maleimide, and 5 parts by weight of 2,2'-azobisisobutyronitrile (manufactured by Wako) were added. The temperature of the reaction vessel was adjusted to 90°C and allowed to stand for 1 hour, and then the temperature was raised to 110°C. The reaction was carried out at 110°C for 3 hours to obtain an alkali-soluble resin B-5.

[0258] The acid value of the alkali-soluble resin B-5 synthesized in this way was 100 mgKOH / g, and the weight-average molecular weight (Mw) measured by GPC was approximately 8,000.

[0259] Synthesis Example 6: Synthesis of alkali-soluble resin B-6

[0260] 200 parts by weight of propylene glycol monomethyl ether acetate was placed in a flask equipped with a stirrer, a thermometer, a reflux condenser, a dropping funnel, and a nitrogen inlet tube, and the inside of the flask was purged with nitrogen.

[0261] Next, after heating the flask to 90°C, 15 parts by weight of methyl 2-((allyloxy)methyl)acrylate, 40 parts by weight of methacrylic acid, 20 parts by weight of methyl methacrylate, 25 parts by weight of cyclohexyl maleimide, 48 parts by weight of glycidyl methacrylate, and 5 parts by weight of 2,2'-azobisisobutyronitrile (manufactured by Wako) were added. The temperature of the reaction vessel was adjusted to 90°C and allowed to stand for 1 hour, and then the temperature was raised to 110°C. The reaction was carried out at 110°C for 3 hours to obtain an alkali-soluble resin B-6.

[0262] The acid value of the alkali-soluble resin B-6 synthesized in this way is 80 mgKOH / g, and the weight-average molecular weight (Mw) measured by GPC is about 9,500.

[0263] Examples 1 to 21 and Comparative Examples 1 to 2: Production of a colored photosensitive resin composition for red pixels

[0264] The respective components were mixed according to the compositions in Tables 1 to 4 below (unit: wt%) to produce a colored photosensitive resin composition for red pixels.

[0265] Experimental Example 1:

[0266] Using the colored photosensitive resin compositions for red pixels produced in the above Examples and Comparative Examples, color filters were produced as follows, and the coloring power, sensitivity, development stains, solvent resistance, straightness, and storage stability at this time were measured by the following methods. The results are shown in Tables 1 to 4 below.

[0267] <Production of color filter>

[0268] The produced colored photosensitive resin composition for red pixels was applied onto a glass substrate (#1737, manufactured by Corning Inc.) by spin coating, and then placed on a hot plate and held at a temperature of 100°C for 3 minutes to form a film. Next, a test photomask having a pattern with a transmittance varying stepwise in the range of 1 to 100% was placed on the above film, and the interval between the film and the test photomask was set to 1000 μm. Using an ultra-high pressure mercury lamp USH-250D (manufactured by Ushio Inc.), light irradiation was performed in an atmospheric atmosphere at an exposure dose of 40 mJ / cm 2 (365 nm). The film after the above ultraviolet irradiation was developed for 70 seconds using a spray developer in a KOH aqueous solution developer with a pH of 12.5. After washing the glass substrate coated with the film with distilled water, it was dried by blowing nitrogen, and then heated in a heating oven at 230°C for 20 minutes to produce a color filter. The pattern shape (film) thickness of the produced color filter was 2.0 to 2.5 μm.

[0269] (1) Coloring power

[0270] The coloring power was based on the coloring agent concentration of the colored photosensitive resin composition for red pixels in Comparative Example 1 as the standard (100%), and the coloring agent concentrations of the colored photosensitive resin compositions for red pixels in the remaining Examples and Comparative Examples were calculated as relative values (%) after comparison. The lower the value of this relative value, the better the physical properties.

[0271] (2) Sensitivity evaluation

[0272] The minimum exposure (mJ / cm2) required to form a thin film without pattern peeling after development in the color filter manufacturing process was determined. 2 ) to evaluate the sensitivity.

[0273] <Evaluation Criteria>

[0274] ◎:10mJ / cm 2 the following

[0275] ○: greater than 10mJ / cm 2 And 20mJ / cm 2 the following

[0276] △: greater than 20mJ / cm 2 and 50mJ / cm 2 the following

[0277] ×: greater than 50 mJ / cm 2

[0278] (3) Evaluation of development stains

[0279] The prepared colored photosensitive resin composition was applied on a glass substrate (#1737, manufactured by Corning Incorporated) by spin coating, and then placed on a hot plate and kept at 100°C for 3 minutes to form a thin film. Next, an ultra-high pressure mercury lamp (USH-250D, manufactured by Ushio Electric Co., Ltd.) was used to irradiate the glass substrate at 40 mJ / cm 2 The film was irradiated with an exposure amount (365nm). The film irradiated with ultraviolet light was developed in a KOH aqueous solution developer solution of pH 12.5 for 80 seconds using a spray developer. The glass substrate covered with the film was cleaned with distilled water and then dried by blowing nitrogen. A small amount of distilled water was dripped on the dried film to keep it in a circular shape. After leaving it at room temperature for 2 minutes, it was blown with nitrogen to dry it. Next, for the pixel portion obtained on the substrate after the development process, the surface state of the coating was observed under a Na lamp, and whether circular stains were generated was judged by naked eyes, and evaluated according to the following evaluation criteria.

[0280] <Development Stain Evaluation Criteria>

[0281] ○: No circular water stains are seen on the coating surface

[0282] △: Slightly visible circular water stains on the coating surface

[0283] ×: Circular water stains are clearly visible on the coating surface

[0284] (4) Evaluation of solvent resistance

[0285] After cutting the fabricated color filter into 3×3 cm, it was immersed in 14.6 ml of N-methyl-2-pyrrolidone (NMP) solution at 80 °C for 40 minutes. Then, the absorbance of the above NMP solution was measured using a UV-Vis spectrometer, and the solvent resistance was evaluated according to the following evaluation criteria.

[0286] <Evaluation Criteria>

[0287] ○: Absorbance is 1 or less

[0288] △: Absorbance is greater than 1 and 3 or less

[0289] ×: Absorbance is greater than 3

[0290] (5) Linearity Evaluation

[0291] The shape of the colored pattern of the fabricated color filter was observed using a scanning electron microscope S-4000 (Hitachi High-Technologies Corporation). At this time, the degree of unevenness and curvature on the pattern was measured, and the linearity was evaluated according to the following evaluation criteria.

[0292] <Evaluation Criteria>

[0293] ○: The line width deviation at the pattern edge is 0.5 μm or less

[0294] △: The line width deviation at the pattern edge is greater than 0.5 μm and 1 μm or less

[0295] ×: The line width deviation at the pattern edge is greater than 1 μm

[0296] (6) Storage Stability Evaluation

[0297] After storing the fabricated red pixels with the color-curable resin composition in an oven at 40 °C for 7 days, the viscosity was measured using a viscometer, and the storage stability was evaluated according to the following evaluation criteria.

[0298] <Evaluation Criteria>

[0299] ○: Viscosity change is less than 2%

[0300] △: Viscosity change is 2% or more and less than 5%

[0301] ×: Viscosity change is 5% or more [Table 1]

[0302]

[0303]

[0304] [Table 2]

[0305]

[0306]

[0307] [Table 3]

[0308]

[0309]

[0310] [Table 4]

[0311]

[0312]

[0313] A-1: Pigment dispersion of Production Example 1 A-2: Pigment dispersion of Production Example 2 A-3: Pigment dispersion of Production Example 3 A-4: Pigment dispersion of Production Example 4 A-5: Pigment dispersion of Production Example 5 A-6: Pigment dispersion of Production Example 6 A-7: Pigment dispersion of Production Example 7 A-8: Pigment dispersion of Production Example 8 A-9: Pigment dispersion of Production Example 9 B-1: Alkali-soluble resin of Synthesis Example 1

[0314] B-2: Alkali-soluble resin of Synthesis Example 2

[0315] B-3: Alkali-soluble resin of Synthesis Example 3

[0316] B-4: Alkali-soluble resin of Synthesis Example 4

[0317] B-5: Alkali-soluble resin of Synthesis Example 5

[0318] B-6: Alkali-soluble resin of Synthesis Example 6

[0319] C: Photopolymerizable compound A9570 (Shin-Nakamura Co., Ltd.)

[0320] D: Irgacure OXE-02 (BASF Korea Ltd.)

[0321] E-1: Pentaerythritol tetra(3-mercaptobutyrate)

[0322] F: Propylene glycol methyl ether acetate (PGMEA, KHNEOCHEM Co., Ltd.)

[0323] G-1: Silicone surfactant SH-8400 (Dow Corning Korea Ltd.)

[0324] G-2: 3-Methacryloxypropyltrimethoxysilane

[0325] As shown in Tables 1 to 3 above, it was confirmed that the colored photosensitive resin compositions for red pixels of Examples 1 to 21 containing C.I. Pigment Orange 72 as a colorant together with a red pigment were excellent in coloring power when forming a pattern, excellent in storage stability and sensitivity during exposure, and excellent in development stain, solvent resistance, and straightness.

[0326] On the other hand, as shown in Table 4, the colored photosensitive resin compositions for red pixels of Comparative Examples 1 and 2 that did not contain Pigment Orange 72 showed poor coloring power, poor sensitivity during exposure, or poor development stain, solvent resistance, or straightness when forming a pattern.

[0327] The specific parts of the present invention have been described in detail above. For those of ordinary skill in the technical field to which the present invention pertains, it is obvious that such specific techniques are merely preferred embodiments, and the scope of the present invention is not limited thereto. As long as one is an ordinary technical person in the technical field to which the present invention pertains, various applications and modifications should be possible within the scope of the present invention based on the above content.

[0328] Therefore, the actual scope of the present invention is determined by the scope of the appended claims and their equivalents.

Claims

1. A colored photosensitive resin composition for red pixels, which comprises a colorant, an alkali-soluble resin, a photopolymerizable compound, a photopolymerization initiator, and a solvent. The colorant comprises a red pigment and an orange pigment. The orange pigment comprises C.I. Pigment Orange 72.

2. The colored photosensitive resin composition for red pixels according to claim 1, wherein the colorant further comprises a yellow pigment.

3. The colored photosensitive resin composition for red pixels according to claim 1, wherein the red pigment is one or more selected from C.I. Pigment Red 177, 242, and 291.

4. The colored photosensitive resin composition for red pixels according to claim 2, wherein the yellow pigment is one or more selected from C.I. Pigment Yellow 138, 139, 150, and 231.

5. The colored photosensitive resin composition for red pixels according to claim 1, wherein the alkali-soluble resin comprises one or more of the repeating units represented by the following Chemical Formulas 1 to 4: Chemical Formula 1 Chemical Formula 2 Chemical Formula 3 Chemical Formula 4 In the chemical formulas, R 1 and R 2 each independently is hydrogen or methyl, R 3 is a hydrogen atom or a residue containing a carboxylic acid derived from an acid anhydride, R 4 is a hydrogen atom or a methyl group, R 5 represents a hydrogen atom, an aliphatic hydrocarbon group having 1 to 20 carbon atoms which may have a substituent, an aromatic hydrocarbon group which may have a substituent, an aliphatic hydrocarbon group having 1 to 20 carbon atoms containing at least one heteroatom which may have a substituent, or an aromatic hydrocarbon group containing at least one heteroatom which may have a substituent R 6 represents an alicyclic hydrocarbon group having 3 to 10 carbon atoms which may have substituents or an aromatic hydrocarbon group which may have substituents, n is 0 or 1.

6. The colored photosensitive resin composition for red pixels according to claim 1, which further comprises a thiol compound.

7. The colored photosensitive resin composition for red pixels according to claim 6, wherein the thiol compound comprises a compound represented by the following Chemical Formula 5. Chemical Formula 5 In the chemical formula, X represents an m-valent aliphatic or aromatic residue having 1 to 20 carbon atoms which may have a substituent. R 7 and R 8 each independently represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, R 9 represents a hydrogen atom, R 10 represents an alkyl group having 1 to 10 carbon atoms n is an integer from 0 to 4. m is an integer from 2 to 8.

8. A color filter formed by using the colored photosensitive resin composition for red pixels according to any one of claims 1 to 7.

9. An image display device, characterized in that, A color filter as claimed in claim 8 is provided.

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