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EP0548870A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Color filter

Assignee: Oji Kako Co Ltd
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Filing: 1992-12-21
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Granted: —
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Expires: 2012-12-21
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Abstract

Abstract A color filter comprising a substrate and, provided thereon, a pattern having a plurality of colors produced by conducting photocrosslinking of a photosensitive resin composition comprising: an aqueous resin emulsion containing an internally added pigment, the aqueous resin emulsion being produced by subjecting a compound having an ethylenically unsaturated group to emulsion polymerization or suspension polymerization in water in the presence of a pigment; and a photocrosslinking agent. According to the present invention, a process for producing a color filter can be simplified because it is unnecessary to form a resin film for protection against dyeing for each step of dyeing in each color, and a pigment can be stably dispersed in a high concentration, so that it is possible to provide a color filter having a homogeneous transparent, colored image excellent in the heat resistance and light fastness.

Inventors

  • 👤 Hiroshi C/O Oji Kako Co. Ltd. Itoh
  • 👤 Shuichi c/o Oji Kako Co. Ltd. Nakazato
  • 👤 Takahisa c/o Oji Kako Co. Ltd. Matsumura
  • 👤 Kyoichi c/o Oji Kako Co. Ltd. Sato

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-05 22:57
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/0005; G03F7/0007; G03F7/004; G03F7/027

Claims Analysis

Total Claims: 15
Claim 1
Independent Claim 68 words
A color filter comprising a substrate and, provided thereon, a pattern having a plurality of colors produced by conducting photocrosslinking of a photosensitive resin composition comprising: an aqueous resin emulsion containing an internally added pigment, said aqueous resin emulsion being produced by subjecting a compound having an ethylenically unsaturated group to emulsion polymerization or suspension polymerization in water in the presence of a pigment; and a photocrosslinking agent.
Claim 2
Dependent Claim 82 words
A color filter as set forth in claim 1, wherein the pigment is selected from the group consisting of organic pigments of azo, phthalocyanine, benzimidazolone, quinacridone, isoindolinone, pyranthrone, dibromoansanthrone, indanthrone, anthrapyrimidine, flavanthrone, perylene, perinone, quinophthalone, phthalone, thioindigo, indigo, dioxazine, anthraquinone, xanthene, methine and azomethine pigments and other polycondensed ring pigments including metal complex polycondensed ring pigments and inorganic pigments of milori blue, iron oxide, cobalt violet, manganese violet, ultramarine blue, iron blue, cobalt blue, cerulean blue, viridian, emerald green and cobalt green.
Claim 3
Dependent Claim 21 words
A color filter as set forth in claim 1, wherein the pigment has a particle diameter of 0.7 µm or less.
Claim 4
Dependent Claim 121 words
A color filter as set forth in claim 1, wherein the compound having an ethylenically unsaturated group is selected from the group consisting of alkyl acrylates, alkyl methacrylates, epoxy acrylates, epoxy methacrylates, urethane acrylates, urethane methacrylates, polyether acrylates, polyether methacrylates, polyester acrylates, polyester methacrylates, acrylic acid, methacrylic acid, glycidyl acrylate, glycidyl methacrylate, allyl acrylate, allyl methacrylate, itaconic acid, acrylamide, methacrylamide, dimethylaminoethyl acrylate, diethylaminoethyl methacrylate, hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate, hydroxypropyl methacrylate, N-methylolacrylamide, N-methylolmethacrylamide, acrylonitrile, styrene, α-methylstyrene, vinyl acetate, vinyltoluene, vinylpyridine, 2-hydroxy-3-phenoxypropyl acrylate, p-nonylphenoxyethyl acrylate, 1,6-hexanediol diacrylate, 1,6-hexanediol dimethacrylate, neopentyl glycol diacrylate, neopentyl glycol dimethacrylate, 2-hydroxy-1-acryloxy-3-methacryloxypropane, 3-butylene glycol dimethacrylate, 2,2-bis[4(acryloxy-polyethoxy)phenyl]propane, 2,2-bis[4(methacryloxy-polyethoxy)phenyl]propane, trimethylolpropane triacrylate, tetramethylolmethane triacrylate, tetramethylolmethane tetraacrylate, dipentaerythritol hexaacrylate, butadiene, isoprene, chloroprene, vinyl chloride, vinyl bromide, vinylidene chloride and vinylidene fluoride.
Claim 5
Dependent Claim 40 words
A color filter as set forth in claim 1, wherein the ratio of the weight (A) of the pigment to the weight (B) of the compound having an ethylenically unsaturated group is in the range of from 1:99 to 80:20.
Claim 6
Dependent Claim 78 words
A color filter as set forth in claim 1, wherein the photosensitive resin composition is a mixture comprising: said aqueous resin emulsion containing an internally added pigment wherein at least one water-soluble polymer selected from the group consisting of partially saponified polyvinyl acetate, partially saponified polyvinyl acetate derivatives, gelatin, casein, collagen, starch, starch derivatives, gum arabic, cellulose derivatives, polyacrylamide, polyacrylic acid and water-soluble nylon is polymerized as a protective colloid agent; and a diazo compound or a dichromate.
Claim 7
Dependent Claim 114 words
A color filter as set forth in claim 1, wherein the photosensitive resin composition is a mixture comprising: said aqueous resin emulsion containing an internally added pigment wherein at least one water-soluble polymer selected from the group consisting of partially saponified polyvinyl acetate, partially saponified polyvinyl acetate derivatives, gelatin, casein, collagen, starch, starch derivatives, gum arabic, cellulose derivatives, polyacrylamide, polyacrylic acid and water-soluble nylon is polymerized as a protective colloid agent; at least one water-soluble polymer selected from the group consisting of partially saponified polyvinyl acetate, partially saponified polyvinyl acetate derivatives, gelatin, casein, collagen, starch, starch derivatives, gum arabic, cellulose derivatives, polyacrylamide, polyacrylic acid and water-soluble nylon; and a diazo compound or a dichromate.
Claim 8
Dependent Claim 150 words
A color filter as set forth in claim 1, wherein the photosensitive resin composition is a mixture comprising: said aqueous resin emulsion containing an internally added pigment wherein at least one water-soluble polymer selected from the group consisting of partially saponified polyvinyl acetate, partially saponified polyvinyl acetate derivatives, gelatin, casein, collagen, starch, starch derivatives, gum arabic, cellulose derivatives, polyacrylamide, polyacrylic acid and water-soluble nylon is polymerized as a protective colloid agent; an emulsified dispersion produced by emulsifying at least one compound having an ethylenically unsaturated group selected from the group consisting of acrylic esters and methacrylic esters containing a photopolymerization initiator dissolved therein through the use of at least one water-soluble polymer selected from the group consisting of partially saponified polyvinyl acetate, partially saponified polyvinyl acetate derivatives, gelatin, casein, collagen, starch, starch derivatives, gum arabic, cellulose derivatives, polyacrylamide, polyacrylic acid and water-soluble nylon; and a diazo compound or a dichromate.
Claim 9
Dependent Claim 107 words
A color filter as set forth in claim 1, wherein the photosensitive resin composition is a photosensitive emulsion comprising: said aqueous resin emulsion containing an internally added pigment wherein at least one water-soluble polymer selected from the group consisting of partially saponified polyvinyl acetate, partially saponified polyvinyl acetate derivatives, gelatin, casein, collagen, starch, starch derivatives, gum arabic, cellulose derivatives, polyacrylamide, polyacrylic acid and water-soluble nylon is polymerized as a protective colloid agent; and, addition-condensed with the water-soluble polymer serving as a protective colloid of the aqueous resin emulsion, at least one photosensitive compound selected from the group consisting of styrylpyridinium salt compounds, styrylquinolinium salt compounds and N-methylolacrylamide.
Claim 10
Dependent Claim 177 words
A color filter as set forth in claim 1, wherein the photosensitive resin composition is a mixture comprising: a photosensitive emulsion comprised of said aqueous resin emulsion containing an internally added pigment wherein at least one water-soluble polymer selected from the group consisting of partially saponified polyvinyl acetate, partially saponified polyvinyl acetate derivatives, gelatin, casein, collagen, starch, starch derivatives, gum arabic, cellulose derivatives, polyacrylamide, polyacrylic acid and water-soluble nylon is polymerized as a protective colloid agent, and, addition-condensed with the water-soluble polymer serving as a protective colloid of the aqueous resin emulsion, at least one photosensitive compound selected from the group consisting of styrylpyridinium salt compounds, styrylquinolinium salt compounds and N-methylolacrylamide; and a photosensitive polymer comprising at least one water-soluble polymer selected from the group consisting of partially saponified polyvinyl acetate, partially saponified polyvinyl acetate derivatives, gelatin, casein, collagen, starch, starch derivatives, gum arabic, cellulose derivatives, polyacrylamide, polyacrylic acid and water-soluble nylon, and, addition-condensed with the water-soluble polymer, at least one photosensitive compound selected from the group consisting of styrylpyridinium salt compounds, styrylquinolinium salt compounds and N-methylolacrylamide.
Claim 11
Dependent Claim 213 words
A color filter as set forth in claim 1, wherein the photosensitive resin composition is a mixture comprising: a photosensitive emulsion comprised of said aqueous resin emulsion containing an internally added pigment wherein at least one water-soluble polymer selected from the group consisting of partially saponified polyvinyl acetate, partially saponified polyvinyl acetate derivatives, gelatin, casein, collagen, starch, starch derivatives, gum arabic, cellulose derivatives, polyacrylamide, polyacrylic acid and water-soluble nylon is polymerized as a protective colloid agent, and, addition-condensed with the water-soluble polymer serving as a protective colloid of the aqueous resin emulsion, at least one photosensitive compound selected from the group consisting of styrylpyridinium salt compounds, styrylquinolinium salt compounds and N-methylolacrylamide; and an emulsified dispersion produced by emulsifying at least one compound having an ethylenically unsaturated group selected from the group consisting of acrylic esters and methacrylic esters containing a photopolymerization initiator dissolved therein through the use of a photosensitive polymer comprising at least one water-soluble polymer selected from the group consisting of partially saponified polyvinyl acetate, partially saponified polyvinyl acetate derivatives, gelatin, casein, collagen, starch, starch derivatives, gum arabic, cellulose derivatives, polyacrylamide, polyacrylic acid and water-soluble nylon, and, addition-condensed with the water-soluble polymer, at least one photosensitive compound selected from the group consisting of styrylpyridinium salt compounds, styrylquinolinium salt compounds and N-methylolacrylamide.
Claim 12
Dependent Claim 97 words
A color filter as set forth in claim 1, wherein the photosensitive resin composition is a mixture comprising: said aqueous resin emulsion containing an internally added pigment wherein at least one surfactant selected from the group consisting of anionic surfactants, cationic surfactants, ampholytic surfactants and nonionic surfactants is polymerized as an emulsion stabilizer; and at least one water-soluble polymer selected from the group consisting of partially saponified polyvinyl acetate, partially saponified polyvinyl acetate derivatives, gelatin, casein, collagen, starch, starch derivatives, gum arabic, cellulose derivatives, polyacrylamide, polyacrylic acid and water-soluble nylon; and a diazo compound or a dichromate.
Claim 13
Dependent Claim 131 words
A color filter as set forth in claim 1, wherein the photosensitive resin composition is a mixture comprising: said aqueous resin emulsion containing an internally added pigment wherein at least one surfactant selected from the group consisting of anionic surfactants, cationic surfactants, ampholytic surfactants and nonionic surfactants is polymerized as an emulsion stabilizer; an emulsified dispersion produced by emulsifying at least one compound having an ethylenically unsaturated group selected from the group consisting of acrylic esters and methacrylic esters containing a photopolymerization initiator dissolved therein through the use of at least one water-soluble polymer selected from the group consisting of partially saponified polyvinyl acetate, partially saponified polyvinyl acetate derivatives, gelatin, casein, collagen, starch, starch derivatives, gum arabic, cellulose derivatives, polyacrylamide, polyacrylic acid, water-soluble nylon; and a diazo compound or a dichromate.
Claim 14
Dependent Claim 118 words
A color filter as set forth in claim 1, wherein the photosensitive resin composition is a mixture comprising: said aqueous resin emulsion containing an internally added pigment wherein at least one surfactant selected from the group consisting of anionic surfactants, cationic surfactants, ampholytic surfactants and nonionic surfactants is polymerized as an emulsion stabilizer; and a photosensitive polymer comprising at least one water-soluble polymer selected from the group consisting of partially saponified polyvinyl acetate, partially saponified polyvinyl acetate derivatives, gelatin, casein, collagen, starch, starch derivatives, gum arabic, cellulose derivatives, polyacrylamide, polyacrylic acid, water-soluble nylon and, addition-condensed with the water-soluble polymer, at least one photosensitive compound selected from the group consisting of styrylpyridinium salt compounds, styrylquinolinium salt compounds and N-methylolacrylamide.
Claim 15
Dependent Claim 154 words
A color filter as set forth in claim 1, wherein the photosensitive resin composition is a mixture comprising: said aqueous resin emulsion containing an internally added pigment wherein at least one surfactant selected from the group consisting of anionic surfactants, cationic surfactants, ampholytic surfactants and nonionic surfactants is polymerized as an emulsion stabilizer; and an emulsified dispersion produced by emulsifying at least one compound having an ethylenically unsaturated group selected from the group consisting of acrylic esters and methacrylic esters containing a photopolymerization initiator dissolved therein through the use of a photosensitive polymer comprising at least one water-soluble polymer selected from the group consisting of partially saponified polyvinyl acetate, partially saponified polyvinyl acetate derivatives, gelatin, casein, collagen, starch, starch derivatives, gum arabic, cellulose derivatives, polyacrylamide, polyacrylic acid, water-soluble nylon, and, addition-condensed with the water-soluble polymer, at least one photosensitive compound selected from the group consisting of styrylpyridinium salt compounds, styrylquinolinium salt compounds and N-methylolacrylamide.

References Cited (Backward Citations)

US4169737A Cited
US5096801A Cited
US5055379A Cited

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