KR20150000618A

KR20150000618A - A black photosensitive resin composition, color filter and display device comprising the same

Info

Publication number: KR20150000618A
Application number: KR20130072916A
Authority: KR
Inventors: 김주호; 박슬기
Original assignee: 동우 화인켐 주식회사
Priority date: 2013-06-25
Filing date: 2013-06-25
Publication date: 2015-01-05
Also published as: KR102028489B1

Abstract

The present invention relates to a black photosensitive resin composition, comprising (A) coloring materials, (B) a binder resin, (C) a photopolymerizable compound, (D) a photopolymerization initiator and (E) a solvent, wherein the coloring materials includes (A1) carbon black, which is a black pigment and (A2) an organic pigment. The organic pigment comprises C.I. pigment red 149 and C.I. pigment blue 15:6. The coloring materials comprise 5-20 parts by weight of (A1) the carbon black which is the black pigment and 80-95 parts by weight of (A2) the organic pigment based on 100 parts by weight of solids. The organic pigment contains 30-65 parts by weight of each of C.I. pigment red 149 and C.I. pigment blue 15:6.

Description

Technical Field [0001] The present invention relates to a black photosensitive resin composition, a color filter including the black photosensitive resin composition,

The present invention relates to a black photosensitive resin composition, a color filter including the same, and a display device.

BACKGROUND ART [0002] Color filters are widely used in imaging elements, liquid crystal displays (LCDs), and the like, and their application range is rapidly expanding. A color filter used in a color liquid crystal display device, an image pickup device, or the like is a device in which a colored photosensitive resin composition containing a pigment corresponding to each color of red, green and blue is uniformly applied by spin coating on a substrate on which a black matrix is pattern- (Hereafter also referred to as "post-baking") is carried out for each color, if necessary, by exposing and developing the coating film formed by heating and drying And then repeatedly forming pixels of each color. Here, the black matrix to be pattern-formed is usually formed of a black photosensitive resin composition.

In recent years, attempts have been made to introduce a black column spacer which can serve as a column spacer capable of supporting a TFT-array layer and a color filter layer through a black matrix. In this case, a uniform optical density Optical density (OD) as well as excellent electrical insulation.

If only carbon black is used as a black matrix for forming the black column spacer, the OD is satisfied but the electrical insulation is poor. In order to overcome these drawbacks, Korean Patent Publication No. 2007-0094460, 2009-0056735, A technique has been proposed for enhancing electrical insulation by using a pigment in combination.

However, conventionally known techniques have excellent OD at a wavelength of 550 nm due to a problem of the kind and content ratio of organic pigments, but the OD at 700 nm or more is remarkably lowered to cause a red light leakage phenomenon when forming an actual black matrix or black column spacer pattern There is a problem.

Korea Patent Publication No. 2007-0094460 Korea Patent Publication No. 2009-0056735

The object of the present invention is to produce a black photosensitive resin composition having excellent optical density (OD) and excellent near IR transmission property at 950 nm.

It is another object of the present invention to provide a color filter and a display device comprising the black photosensitive resin composition.

In order to achieve the above object,

(A) a coloring material, (B) a binder resin, (C) a photopolymerizable compound, (D) a photopolymerization initiator and (E) A2) an organic pigment, wherein the (A2) organic pigment comprises CI Pigment Red 149 and C.I. (A) 5 to 20 parts by weight of (A1) carbon black, which is a black pigment, and (A2) 80 to 95 parts by weight of an organic pigment, based on 100 parts by weight of the solid content of the coloring material , (A2) CI contained in the organic pigment Pigment Red 179 and C.I. And Pigment Blue 15: 6 each comprise 30 to 65 parts by weight of the black photosensitive resin composition.

The present invention also provides a color filter comprising a black mattress or a black column spacer made of the black photosensitive resin composition.

Further, the present invention provides a display device including the color filter.

The black photosensitive resin composition of the present invention has an excellent optical density (OD) and an excellent near IR transmission characteristic of 950 nm, and the black photosensitive resin composition can be used to manufacture a color filter and a display device.

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

The black photosensitive resin composition comprises (A) a coloring material, (B) a binder resin, (C) a photopolymerizable compound, (D) a photopolymerization initiator, and (E) (A2) an organic pigment comprising CI Pigment Red 149 and CI Pigment Blue 15: 6, wherein (A) the solid content of the coloring material is 100 weight% (A2) an organic pigment comprises 80 to 95 parts by weight, (A2) CI Pigment Red 179 contained in an organic pigment, and CI Pigment Blue 15: 6 each contain 30 to 65 parts by weight of the black photosensitive resin composition.

(A) Coloring material

The coloring material (A) includes black pigments (A1) carbon black and (A2) an organic pigment, and the organic pigment is C.I. Pigment Red 149 and C.I. Pigment Blue 15: 6.

The carbon black (A1) as the black pigment is not particularly limited as long as it is a light-shielding pigment, and known carbon black can be used. Specific examples of the carbon black that is the black pigment include channel black, furnace black, thermal black, lamp black, and the like.

The carbon black, which is the black pigment, may be a resin-coated carbon black. Since the carbon black coated with the resin has a lower conductivity than that of the carbon black not coated with the resin, excellent electrical insulation can be imparted to the black matrix or black column spacer when the spacer is formed.

As the organic pigment (A2), those generally used in the art can be applied. The organic pigments may be used in combination of two or more kinds, and it is preferable to select and use those that have optical densities similar to those of carbon black and can impart excellent electrical insulating properties. Pigment Red 149 and C.I. Pigment Blue 15: 6 is most preferably used in combination.

Examples of the organic pigment include various pigments used in printing ink, ink jet ink, etc. Specific examples thereof include water-soluble azo pigments, insoluble azo pigments, phthalocyanine pigments, quinacridone pigments, isoindolinone pigments, Anthanthrone pigments, indanthrone pigments, pravanthrone pigments, anthraquinone pigments, anthraquinone pigments, anthanthrone pigments, anthanthrone pigments, indanthrone pigments, indanthrone pigments, Pyranthrone pigments, diketopyrrolopyrrole pigments, and the like.

Particularly, the organic pigments specifically include compounds classified as pigments in the Society of Dyers and Colourists, and more specifically, pigments having a color index (CI) number as follows However, the present invention is not limited thereto.

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

C.I. Pigment Orange 13, 31, 36, 38, 40, 42, 43, 51, 55, 59, 61, 64, 65, and 71

C.I. Pigment Red 9, 97, 105, 122, 123, 144, 149, 166, 168, 176, 177, 179, 180, 192, 215, 216, 224, 242, 254, 255 and 264

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

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

C.I. Pigment Green 7, 10, 15, 25, 36, 47 and 58

C.I Pigment Brown 28

C.I Pigment Black 1 and 7, etc.

The organic pigments may be used in combination of two or more kinds. Pigment Red 149 and C.I. Pigment Blue 15: 6 are preferably used in combination.

(A2) the organic pigment (A) is used in an amount of 80 to 95 parts by weight based on 100 parts by weight of the solid content of the coloring material (A) . When the content of the carbon black is less than 5 parts by weight, the optical density is low. When the content of the carbon black exceeds 20 parts by weight, the electrical insulating property is deteriorated. In addition, organic pigments may have good electrical insulation and even optical density in the above range. Further, C.I. Pigment Red 149 and CI Pigment Blue 15: 6 each contain 30 to 65 parts by weight based on 100 parts by weight of the solid content of the coloring material (A), have an optical density uniform in the above range, and have excellent near IR transmittance of 950 nm .

The coloring material (A) includes 15 to 60 parts by weight based on 100 parts by weight of the solid content in the black photosensitive resin composition. When the content of the coloring material is less than 15 parts by weight, the optical density is not sufficient. When the amount of the coloring material is more than 60 parts by weight, the optical density is sufficient, but pattern formation may be difficult.

(B) binder resin

As the binder resin (B), those generally used in the art can be applied, and in particular, the binder resin is preferably a copolymer of a compound having an unsaturated carboxyl group and another monomer copolymerizable therewith.

The compound having an unsaturated carboxyl group is not limited as long as it is a carboxylic acid compound having an unsaturated double bond capable of being polymerized and can be used singly or in combination of two or more kinds.

Examples of the compound having an unsaturated carboxyl group include monocarboxylic acids such as acrylic acid, methacrylic acid and crotonic acid; Dicarboxylic acids such as fumaric acid, mesaconic acid and itaconic acid; And an anhydride of the dicarboxylic acid; mono (meth) acrylates of a polymer having a carboxyl group and a hydroxyl group at both ends such as? -carboxypolycaprolactone mono (meth) acrylate, monomethyl (meth) acrylate, monomethyl maleic acid, Mono-2 - ((meth) acryloyloxy) ethyl phthalate, mono-2 - ((meth) acryloyloxy) ethyl succinate or mixtures thereof.

Among the compounds having the above-exemplified unsaturated carboxyl groups, acrylic acid and methacrylic acid are preferred because of their excellent copolymerization reactivity and solubility in a developing solution.

The other monomer capable of copolymerizing with the carboxyl group-containing monomer is a monomer having a carbon-carbon unsaturated bond, and specific examples thereof include aromatic vinyl compounds such as styrene,? -Methylstyrene and vinyltoluene; Acrylates such as methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, butyl acrylate, butyl methacrylate, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, benzyl acrylate, Unsaturated carboxylate compounds such as acrylate; Unsaturated aminoalkyl carboxylate compounds such as aminoethyl acrylate; Unsaturated glycidyl carboxylate compounds such as glycidyl methacrylate; Vinyl carboxylate compounds such as vinyl acetate and vinyl propionate; Vinylcyanide compounds such as acrylonitrile, methacrylonitrile and? -Chloroacrylonitrile; 3-methyl-3-acryloxymethyloxetane, 3-methyl-3-acryloxymethyloxetane, 3-methyl-3-methacryloxymethyloxetane, Methyl-3-acryloxyethyl oxetane, 3-methyl-3-acryloxyethyl oxetane, 3-methyl-3-methacryloxyethyl oxetane, Unsaturated oxetanecarboxylate compounds, and the like.

In addition, the binder resin may use a cadene resin commonly used in the art.

The cardade resin is a mixture of 3,3-bis (4-hydroxyphenyl) -2-benzofuran-1 (3H) (3H) -one, 3,3-bis (4-hydroxy-2,5-dimethylphenyl) (3H) -one, 3,3-bis (4-hydroxy-5-isopropyl-2-methylphenyl) -2-benzofuran- , 3,3-bis (3,5-dibromo-4-hydroxyphenyl) -2-benzofuran-l (3H) (4-hydroxyphenyl) -10-anthrone, 1,2-bis (4-carboxyphenyl) carboran, 1, Bis (4'-carboxyphenyl) phthalide, 9,10-bis- (4-carboxyphenyl) (4-aminophenyl) -anthracene, anthrone dianiline, and aniline phthalein. Bis (4-hydroxyphenyl) sulfone, bis (4-hydroxy-3,5-dimethylphenyl) sulfone, bis Hexafluoropropane, bis (4-hydroxy-3,5-dimethylphenyl) hexafluoropropane and bis (4-hydroxy-3,5-dichlorophenyl) hexafluoropropane, bis (4-hydroxyphenyl) dimethylsilane, bis (4-hydroxyphenyl) dimethylsilane, bis (4-hydroxyphenyl) Bis (4-hydroxyphenyl) methane, bis (4-hydroxy-3,5-dibromophenyl) methane, 2,2- Bis (4-hydroxy-3-methylphenyl) propane, 2,2-bis (4-hydroxy-3,5-dichlorophenyl) propane, Propane and bis (4-hydroxy-3-chlorophenyl) propane, bis (4-hydroxyphenyl) Bis (4-hydroxyphenyl) ether and bis (4-hydroxy-3,5-dichlorophenyl) ether, 9,9- Fluorene, 9,9-bis (4-hydroxy-3-chlorophenyl) fluorene, 9,9-bis 3-fluorophenyl) fluorene, 9,9-bis (4-hydroxy-3-methoxyphenyl) fluorene, 9,9- ) Fluorene, 9,9-bis (4-hydroxy-3,5-dichlorophenyl) fluorene and 9,9-bis (4-hydroxy-3,5-dibromophenyl) Or may be obtained by polymerizing a compound containing at least one monomer.

The binder resin may be contained in an amount of 5 to 50 parts by weight, preferably 10 to 40 parts by weight, based on 100 parts by weight of the solid content in the black photosensitive resin composition. When the binder resin is included in the above amount, it is possible to form a pattern, and resolution and retention rate are improved.

(C) Photopolymerization compound

The above-mentioned (C) photopolymerizable compound is a compound capable of polymerizing under the action of light and a photopolymerization initiator described later, and examples thereof include monofunctional monomers, bifunctional monomers, and other polyfunctional monomers.

Specific examples of the monofunctional monomer include nonylphenylcarbitol acrylate, 2-hydroxy-3-phenoxypropyl acrylate, 2-ethylhexylcarbitol acrylate, 2-hydroxyethyl acrylate, N- Money and so on.

Specific examples of the bifunctional monomer include 1,6-hexanediol di (meth) acrylate, ethylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, triethylene glycol di (meth) Bis (acryloyloxyethyl) ether of bisphenol A, 3-methylpentanediol di (meth) acrylate, and the like.

Specific examples of other polyfunctional monomers include trimethylolpropane tri (meth) acrylate, ethoxylated trimethylolpropane tri (meth) acrylate, propoxylated trimethylolpropane tri (meth) acrylate, pentaerythritol Acrylate, trimethylolpropane trimethacrylate, tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, ethoxylated dipentaerythritol hexa (Meth) acrylate, dipentaerythritol hexa (meth) acrylate, and the like.

Of these, multifunctional monomers having two or more functional groups are preferably used.

The photopolymerizable compound is used in an amount of 5 to 50 parts by weight, preferably 10 to 30 parts by weight, based on 100 parts by weight of the solid component in the black photosensitive resin composition. When the polymerizable compound is in the above range, there is an advantage that the pattern characteristic becomes good.

(D) Light curing Initiator

The photopolymerization initiator (D) is not limited, but it is preferable to use at least one compound selected from the group consisting of triazine-based compounds, acetophenone-based compounds, nonimidazole-based compounds and oxime compounds.

Examples of the triazine compound include 2,4-bis (trichloromethyl) -6- (4-methoxyphenyl) -1,3,5-triazine, 2,4-bis (trichloromethyl) (Trichloromethyl) -6-piperonyl-1,3,5-triazine, 2,4-bis (trichloromethyl) Bis (trichloromethyl) -6- [2- (5-methylfuran-2-yl) -Yl) ethenyl] -1,3,5-triazine, 2,4-bis (trichloromethyl) -6- [2- (furan- Azine, 2,4-bis (trichloromethyl) -6- [2- (4-diethylamino-2-methylphenyl) ethenyl] -1,3,5-triazine, 2,4- Methyl) -6- [2- (3,4-dimethoxyphenyl) ethenyl] -1,3,5-triazine.

Examples of the acetophenone compound include diethoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, benzyldimethylketal, 2- (4-methylthioxy) phenyl] -2-methylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, 2- 2-methyl-1- [4- (1-methylvinyl) phenyl] propane-1-one, 1-one oligomers and the like.

The acetophenone compound may be a compound represented by the following general formula (1).

[Chemical Formula 1]

Each of R ₁ to R ₄ independently represents a hydrogen atom, a halogen atom, a hydroxyl group, a phenyl group which may be substituted with an alkyl group having 1 to 12 carbon atoms, a benzyl group which may be substituted with an alkyl group having 1 to 12 carbon atoms, Or a naphthyl group which may be substituted with an alkyl group having 1 to 12 carbon atoms.

Specific examples of the compound represented by Formula 1 include 2-methyl-2-amino (4-morpholinophenyl) ethan-1-one, 2-ethyl- 2-amino (4-morpholinophenyl) ethan-1-one, 2-methyl-2 2-amino (4-morpholinophenyl) propan-1-one, 2-methyl- 2-methyl-2-methylamino (4-morpholinophenyl) propan-1-one 2-dimethylamino (4-morpholinophenyl) propan-1-one, 2-methyl-2-diethylamino .

Examples of the imidazole compound include 2,2'-bis (2-chlorophenyl) -4,4 ', 5,5'-tetraphenylbiimidazole, 2,2'- Dichlorophenyl) -4,4 ', 5,5'-tetraphenylbiimidazole, 2,2'-bis (2-chlorophenyl) -4,4', 5,5'-tetra (alkoxyphenyl) (2-chlorophenyl) -4,4 ', 5,5'-tetra (trialkoxyphenyl) biimidazole, the phenyl group at the 4,4', 5,5 ' An imidazole compound substituted by an alkoxy group, and the like. Of these, 2,2'-bis (2-chlorophenyl) -4,4 ', 5,5'-tetraphenylbiimidazole, 2,2'-bis (2,3- 5,5'-tetraphenylbiimidazole can be preferably used.

Examples of the oxime compounds include compounds represented by the following formulas (2) to (4).

(2)

(3)

[Chemical Formula 4]

Further, in addition to the above-mentioned photopolymerization initiator, other photopolymerization initiators commonly used in this field may be further used insofar as the effect of the present invention is not impaired. Examples of other photopolymerization initiators include benzoin-based compounds, benzophenone-based compounds, thioxanthone-based compounds, anthracene-based compounds, and polyfunctional thiol compounds. These may be used alone or in combination of two or more.

Examples of the benzoin compound include benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, and benzoin isobutyl ether.

Examples of the benzophenone compound include benzophenone, methyl 0-benzoylbenzoate, 4-phenylbenzophenone, 4-benzoyl-4'-methyldiphenylsulfide, 3,3 ', 4,4'-tetra tert-butylperoxycarbonyl) benzophenone, 2,4,6-trimethylbenzophenone, and the like.

Examples of the thioxanthone compound include 2-isopropylthioxanthone, 2,4-diethylthioxanthone, 2,4-dichlorothioxanthone, 1-chloro-4- .

Examples of the anthracene compound include 9,10-dimethoxyanthracene, 2-ethyl-9,10-dimethoxyanthracene, 9,10-diethoxyanthracene, 2-ethyl-9,10-diethoxyanthracene, .

Examples of the polyfunctional thiol compound include tris- (3-mercaptopropionyloxy) -ethyl-isocyanurate, trimethylolpropane tris-3-mercaptopropionate, pentaerythritol tetrakis- -Mercaptopropionate, dipentaerythritol tetrakis-3-mercaptopropionate, and the like.

Other examples include 2,4,6-trimethylbenzoyldiphenylphosphine oxide, 10-butyl-2-chloroacridone, 2-ethylanthraquinone, benzyl, 9,10-phenanthrenequinone, camphorquinone, phenylclyoxylic acid Methyl, titanocene compounds and the like can be mentioned as other photopolymerization initiators.

According to the present invention, the photopolymerization initiator (D-1) may be used in combination with the photopolymerization initiator. When the photopolymerization initiator is used in combination with the photopolymerization initiator, the sensitivity of the black photosensitive resin composition containing the photopolymerization initiator becomes higher, so that the productivity when the black matrix or the black column spacer is formed can be improved.

As the (D-1) photopolymerization initiation aid, at least one compound selected from the group consisting of an amine compound and a carboxylic acid compound can be preferably used.

Specific examples of the amine compound in the photopolymerization initiation auxiliary include aliphatic amine compounds such as triethanolamine, methyldiethanolamine and triisopropanolamine; aliphatic amine compounds such as methyl 4-dimethylaminobenzoate, ethyl 4-dimethylaminobenzoate, N, N-dimethyl para-toluidine, 4,4'-bis (dimethylamino) benzophenone (commonly known as Michler's ketone), 4,4'- And aromatic amine compounds such as bis (diethylamino) benzophenone. As the amine compound, an aromatic amine compound is preferably used. Specific examples of the carboxylic acid compound in the photopolymerization initiation assistant include phenylthioacetic acid, methylphenylthioacetic acid, ethylphenylthioacetic acid, methylethylphenylthioacetic acid, dimethylphenylthioacetic acid, methoxyphenylthioacetic acid, dimethoxyphenylthioacetic acid, chlorophenyl Aromatic heteroacetic acids such as thioacetic acid, dichlorophenylthioacetic acid, N-phenylglycine, phenoxyacetic acid, naphthylthioacetic acid, N-naphthylglycine, and naphthoxyacetic acid.

The content of the photopolymerization initiator is 0.1 to 30 parts by weight, preferably 1 to 20 parts by weight, based on 100 parts by weight of the solid content in the black photosensitive resin composition. The content of the photopolymerization initiator is 0.1 to 30 parts by weight, preferably 1 to 20 parts by weight, based on 100 parts by weight of the solid content of the black photosensitive resin composition. When the content of the photopolymerization initiator is within the above range, the sensitivity of the black photosensitive resin composition is increased, which is preferable because the strength of the pixel portion formed using the composition and the smoothness on the surface of the pixel portion can be improved. When the amount of the photopolymerization initiator is within the above range, the sensitivity of the black photosensitive resin composition is higher and the productivity of the color filter formed using the composition is improved.

(E) Solvent

The (E) solvent is not particularly limited, and various organic solvents conventionally used in the art may be used.

Specific examples of the solvent 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 dimethyl ether, diethylene glycol diethyl Diethylene glycol diethyl ether, diethylene glycol dipropyl ether, diethylene glycol dibutyl ether and the like, ethylene glycol alkyl ether acetates such as methyl cellosolve acetate and ethyl cellosolve acetate, propylene glycol monomethyl ether Alkylene glycol alkyl ether acetates such as acetone, propylene glycol monoethyl ether acetate and propylene glycol monopropyl ether acetate, alkoxyalkyl acetates such as methoxybutyl acetate and methoxypentyl acetate, benzene, toluene, xylene, mesitylene and the like Of Alcohols such as methanol, ethanol, propanol, butanol, hexanol, cyclohexanol, ethylene glycol and glycerin, alcohols such as methanol, ethanol and the like; aliphatic hydrocarbons, such as methyl ethyl ketone, acetone, methyl amyl ketone, methyl isobutyl ketone and cyclohexanone; Esters such as ethyl ethoxypropionate and methyl 3-methoxypropionate, and cyclic esters such as? -Butyrolactone.

Among the above solvents, an organic solvent having a boiling point of 100 to 200 ° C in the solvent can be preferably used in terms of coatability and dryness, more preferably an alkylene glycol alkyl ether acetate, a ketone, a 3-ethoxypropionic acid Ethyl and 3-methoxypropionate, and more preferred examples thereof include propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, cyclohexanone, ethyl 3-ethoxypropionate, 3-methoxy Methyl propionate and the like.

These solvents may be used alone or in combination of two or more.

The solvent includes 60 to 90 parts by weight, preferably 70 to 85 parts by weight, based on 100 parts by weight of the black photosensitive resin composition. When the content of the solvent is within the above range, it is preferable that the solvent is coated in a coating apparatus such as a roll coater, a spin coater, a slit and spin coater, a slit coater (sometimes referred to as a die coater), or an ink jet.

(F) Additive

(F) additives such as fillers, other polymer compounds, curing agents, pigment dispersants, adhesion promoters, antioxidants, ultraviolet absorbers, and anti-aggregation agents may be added to the black photosensitive resin composition of the present invention.

Specific examples of the filler include glass, silica, and alumina.

Specific examples of the other polymer compound specifically include a curable resin such as epoxy resin and maleimide resin, a thermoplastic resin such as polyvinyl alcohol, polyacrylic acid, polyethylene glycol monoalkyl ether, polyfluoroalkyl acrylate, polyester, polyurethane and the like .

The curing agent is used for enhancing deep curing and mechanical strength. Examples of the curing agent include an epoxy compound, a polyfunctional isocyanate compound, a melamine compound, and an oxetane compound.

Specific examples of the epoxy compound in the curing agent include bisphenol A epoxy resin, hydrogenated bisphenol A epoxy resin, bisphenol F epoxy resin, hydrogenated bisphenol F epoxy resin, novolak epoxy resin, other aromatic epoxy resin, alicyclic epoxy resin Alicyclic or aromatic epoxy compounds, butadiene (co) polymeric epoxides and isoprene (co) polymers other than the brominated derivatives, epoxy resins and brominated derivatives of these epoxy resins, glycidyl ester resins, glycidyl amine resins, (Co) polymer epoxide, glycidyl (meth) acrylate (co) polymer, and triglycidyl isocyanurate.

Specific examples of the oxetane compound in the curing agent include carbonate bisoxetane, xylene bisoxetane, adipate bisoxetane, terephthalate bisoxetane, and cyclohexanedicarboxylic acid bisoxetane.

The curing agent may be used together with a curing agent in combination with a curing auxiliary compound capable of ring-opening polymerization of the epoxy group of the epoxy compound and the oxetane skeleton of the oxetane compound. Examples of the curing aid compound include polyvalent carboxylic acids, polyvalent carboxylic acid anhydrides, acid generators, and the like.

The carboxylic acid anhydrides may be those commercially available as an epoxy resin curing agent. Examples of commercially available epoxy resin curing agents include trade name (ADEKA HARDONA EH-700) (ADEKA INDUSTRIAL CO., LTD.), Trade name (RICACIDO HH) (Manufactured by Shin-Etsu Chemical Co., Ltd.).

The curing agent and curing auxiliary compound exemplified above may be used alone or in combination of two or more.

As the pigment dispersant, commercially available surfactants can be used, and examples thereof include surfactants such as silicone, fluorine, ester, cationic, anionic, nonionic, and amphoteric surfactants. These may be used alone or in combination of two or more.

Examples of the surfactant include polyoxyethylene alkyl ethers, polyoxyethylene alkylphenyl ethers, polyethylene glycol diesters, sorbitan fatty acid esters, fatty acid modified polyesters, tertiary amine modified polyurethanes, polyethylene (Manufactured by Shin-Etsu Chemical Co., Ltd.), POLYFLOW (manufactured by Kyoeisha Chemical Co., Ltd.), EFTOP (manufactured by TOKEM PRODUCTS CO., LTD.), Megafac (Manufactured by Dainippon Ink & Chemicals, Inc.), Flourad (manufactured by Sumitomo 3M Limited), Asahi guard, Surflon (manufactured by Asahi Glass Co., Ltd.) (Manufactured by Lubrisol), EFKA (manufactured by EFKA Chemical), PB 821 (manufactured by Ajinomoto), and Disperbyk-series (manufactured by BYK-chemi).

Specific examples of the adhesion promoter include vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris (2-methoxyethoxy) silane, N- (2-aminoethyl) -3-aminopropylmethyldimethoxysilane, N- Aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 2- ( 3-chloropropylmethyldimethoxysilane, 3-chloropropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-mercaptopropyltrimethoxysilane, 3- 3-isocyanatopropyltrimethoxysilane, 3-isocyanatepropyltriethoxysilane, and the like.

The adhesion promoter may be used alone or in combination of two or more. It is preferable to use 0.01 to 10 parts by weight, preferably 0.05 to 2 parts by weight, based on 100 parts by weight of the solid content in the black photosensitive resin composition.

Specific examples of the antioxidant include hindered phenols such as 2,2'-thiobis (4-methyl-6-t-butylphenol) and 2,6-di-t-butyl-4-methylphenol.

Specific examples of the ultraviolet absorber include 2- (3-tert-butyl-2-hydroxy-5-methylphenyl) -5-chlorobenzothiazole and alkoxybenzophenone.

Specific examples of the anti-aggregation agent include sodium polyacrylate and the like.

The black photosensitive resin composition of the present invention can be produced, for example, by the following method.

(A) The coloring material is mixed with the (E) solvent in advance and dispersed using a bead mill or the like until the average particle diameter of the coloring material becomes about 0.2 탆 or less. At this time, a pigment dispersant may be used if necessary, and some or all of the binder resin (B) may be blended. After adding the balance of the binder resin (B), the photopolymerizable compound (C), the photopolymerization initiator (D) and, if necessary, the additive (F), to the obtained dispersion (hereinafter sometimes referred to as a mill base) Then, an additional solvent is further added to a predetermined concentration to obtain a desired black photosensitive resin composition.

The present invention also provides a color filter made of the black photosensitive resin composition.

The color filter according to the present invention includes a black matrix or black column spacer obtained by applying the above-described black photosensitive resin composition according to the present invention onto a substrate, and exposing and developing it in a predetermined pattern. The substrate may be a glass plate, a silicon wafer, a plate of a plastic substrate such as polyethersulfone (PES), polycarbonate (PC), or the like, and the kind thereof is not particularly limited.

More specifically, a method for forming a pattern of a black matrix or a black column spacer using a black photosensitive resin composition according to the present invention comprises the steps of: applying the above-mentioned black photosensitive resin composition onto a substrate; coating a part of the black photosensitive resin composition And a developing step of removing the exposed area or the non-exposed area of the black photosensitive resin composition.

In the applying step, the black photosensitive composition of the present invention is coated on a substrate and pre-dried to remove a volatile component such as a solvent to obtain a smooth coated film. The thickness of the coating film at this time is usually about 0.5 to 5 mu m.

The exposure step irradiates a specific region with ultraviolet rays through a mask to obtain a desired pattern on the coating film obtained above. At this time, it is preferable to use an apparatus such as a mask aligner or a stepper so that the entire exposed portion is uniformly irradiated with parallel rays, and the mask and the substrate are accurately positioned.

In the developing step, the coated film after completion of the curing is contacted with an alkali aqueous solution, which is a developing solution, to dissolve and expose the non-exposed region, thereby producing a desired pattern. After development, if necessary, post-drying may be performed at about 150 to 230 DEG C for about 10 to 60 minutes.

The developing solution used in the developing step is usually an aqueous solution containing an alkaline compound and a surfactant.

The alkaline compound in the developer may be either an inorganic or an organic alkaline compound. Specific examples of the inorganic alkaline compound include sodium hydroxide, potassium hydroxide, disodium hydrogen phosphate, sodium dihydrogen phosphate, ammonium dihydrogen phosphate, ammonium dihydrogen phosphate, potassium dihydrogen phosphate, sodium silicate, potassium silicate, sodium carbonate, , Potassium hydrogencarbonate, sodium borate, potassium borate, and ammonia. Specific examples of the organic alkaline compound include tetramethylammonium hydroxide, 2-hydroxyethyltrimethylammonium hydroxide, monomethylamine, dimethylamine, trimethylamine, monoethylamine, diethylamine, triethylamine, mono Isopropylamine, diisopropylamine, ethanolamine, and the like. These inorganic and organic alkaline compounds may be used alone or in combination of two or more.

The preferable concentration of the alkaline compound in the developer is in the range of 0.01 to 10% by weight, more preferably 0.03 to 5% by weight.

The surfactant in the developer may be any of a nonionic surfactant, an anionic surfactant or a cationic surfactant. Specific examples of the nonionic surfactants include polyoxyethylene alkyl ethers, polyoxyethylene aryl ethers, polyoxyethylene alkyl aryl ethers, other polyoxyethylene derivatives, oxyethylene / oxypropylene block copolymers, sorbitan fatty acid esters, poly Oxyethylene sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, glycerin fatty acid esters, polyoxyethylene fatty acid esters, polyoxyethylene alkylamines, and the like.

Specific examples of the anionic surfactant include higher alcohol sulfuric acid ester salts such as sodium lauryl alcohol sulfate ester and sodium oleyl alcohol sulfate ester, alkylsulfates such as sodium laurylsulfate and ammonium laurylsulfate, sodium dodecylbenzenesulfonate and sodium dodecylbenzenesulfonate And alkylarylsulfonic acid salts such as sodium naphthalenesulfonate.

Specific examples of the cationic surfactants include amine salts such as stearylamine hydrochloride and lauryltrimethylammonium chloride, and quaternary ammonium salts. These surfactants may be used alone or in combination of two or more.

The content of the surfactant in the developer is usually 0.01 to 10 parts by weight, preferably 0.05 to 8 parts by weight, more preferably 0.1 to 5 parts by weight, based on 100 parts by weight of the alkali developing solution.

Through the above process, a black matrix or a black column spacer is obtained.

The optical density of the black matrix or the black column spacer of the color filter manufactured as described above according to the present invention is 1.5 / 占 퐉 or more, and the near IR transmittance at 950 nm is 30% or more per 1 占 퐉.

Therefore, the present invention provides a display device provided with the color filter.

The display device includes a configuration known in the art except for the color filter. That is, all display devices to which the color filter of the present invention can be applied are included in the present invention. For example, a transmissive liquid crystal display device in which a counter electrode substrate having a thin film transistor (TFT element), a pixel electrode, and an alignment layer are faced at predetermined intervals and a liquid crystal material is injected into the gap portion to form a liquid crystal layer . There is also a reflective liquid crystal display device in which a reflective layer is provided between the substrate of the color filter and the colored layer. As another example, a TFT (Thin Film Transistor) substrate integrated on a transparent electrode of a color filter and a liquid crystal display device including a backlight fixed at a position where the TFT substrate overlaps with a color filter can be given. The TFT substrate includes an outer frame made of a light-proof resin surrounding the peripheral surface of the color filter, a liquid crystal layer made of a nematic liquid crystal placed in the outer frame, a plurality of pixel electrodes , A transparent glass substrate on which pixel electrodes are formed, and a polarizing plate formed on the exposed surface of the transparent glass substrate.

The polarizing plate has a polarization direction perpendicular to the polarizing direction and is made of an organic material such as polyvinyl alcohol. Each of the plurality of pixel electrodes is connected to a plurality of thin film transistors formed on a glass substrate of a TFT substrate. If a predetermined potential difference is applied to a specific pixel electrode, a predetermined voltage is applied between the specific pixel electrode and the transparent electrode. Accordingly, the electric field formed according to the voltage changes the orientation of the region corresponding to the specific pixel electrode of the liquid crystal layer.

Hereinafter, the present invention will be described in more detail based on examples. However, the following examples are illustrative of the present invention, and the present invention is not limited to the following examples.

Manufacturing example 1. (B) Preparation of binder resin

A flask equipped with a stirrer, a thermometer reflux condenser, a dropping funnel and a nitrogen inlet tube was prepared, and 176 g (1.00 mol) of benzyl methacrylate, 35.4 g (0.30 mol) of methacrylic acid, 4 g of t-butylperoxy-2-ethylhexanoate and 40 g of propylene glycol monomethyl ether acetate were charged and stirred to prepare a n-dodecanethiol 6 g, and PGMEA (24 g) were added and stirred. Then, 395 g of propylene glycol monomethyl ether acetate was poured into the flask, the atmosphere in the flask was changed from air to nitrogen, and the temperature of the flask was raised to 90 캜 while stirring. Thereafter, the monomer and the chain transfer agent were dropped from the dropping funnel. The mixture was allowed to stand for 2 hours while maintaining the temperature at 90 占 폚. After 1 hour, the temperature was elevated to 110 占 폚 and the reaction was continued for 8 hours to obtain a resin having a solid acid value of 70 mgKOH / g. The weight average molecular weight in terms of polystyrene measured by GPC was 21,000 and the molecular weight distribution (Mw / Mn) was 2.2.

&Lt; (A) Preparation of coloring material >

Manufacturing example 1 to 6 and comparison Manufacturing example 1 to 6.

20 parts by weight of the coloring materials (A1 and A2), the pigment dispersants (F1 and F2), the solvent (E1) and the solvent (E2) were mixed in a vessel among the components listed in Tables 1 and 2, (Manufactured by Dyno, ECM-Lab) was further mixed with 40 parts by weight of the solvent (E2), followed by stirring at a linear velocity of 5 m / Dispersion was carried out for 3 hours at a linear velocity of 8 m / s and a flow rate of 2 kg / min using 0.3 mm zirconia beads, and 12.7 parts by weight of the remaining amount of the solvent (E2) To 12 were prepared.

(Unit: parts by weight) (A) Production example of coloring material Production Example 1
(BK1) Production Example 2
(BK2) Production Example 3
(BK3) Production Example 4
(BK4) Production Example 5
(BK5) Production Example 6
(BK6) The coloring pigment (A1) PBK 1.0 2.0 3.0 4.0 2.0 2.0 The coloring pigment (A2) PR149 10.0 8.0 9.0 8.0 12.0 6.0 PB15: 6 9.0 10.0 8.0 8.0 6.0 12.0 The pigment dispersant (F1) 0.3 0.3 0.3 0.3 0.3 0.3 The pigment dispersant (F2) 4 4 4 4 4 4 Solvent (E1) 3 3 3 3 3 3 Solvent (E2) 72.7 72.7 72.7 72.7 72.7 72.7

(Unit: parts by weight) (A) Coloring material
Comparative Manufacturing Example compare
Production Example 1
(BK7) compare
Production Example 2
(BK8) compare
Production Example 3
(BK9) compare
Production Example 4
(BK10) compare
Production Example 5
(BK11) compare
Production Example 6
(BK12) The coloring pigment (A1) PBK 0.0 5.0 2.0 2.0 4.0 4.0 The coloring pigment (A2) PR149 14.0 6.0 4.0 14.0 0.0 0.0 PB15: 6 6.0 9.0 14.0 4.0 8.0 8.0 PR254 0.0 0.0 0.0 0.0 8.0 0.0 PR177 0.0 0.0 0.0 0.0 0.0 8.0 The pigment dispersant (F1) 0.3 0.3 0.3 0.3 0.3 0.3 The pigment dispersant (F2) 4 4 4 4 4 4 Solvent (E1) 3 3 3 3 3 3 Solvent (E2) 72.7 72.7 72.7 72.7 72.7 72.7

The coloring material (A)

- PBK: Carbon black (MA-8, manufactured by Mitsubishi)

- PR149: C.I. Pigment Red 149 (PV FAST RED B, manufactured by Clariant)

- PR254: C.I. Pigment Red 254 (BT-CF, manufactured by Ciba)

- PR177: C.I. Pigment Red 177 (ATY-TR. DIC)

- PB15: 6: C.I. Pigment Blue 15: 6 (EP-193, manufactured by DIC)

Dispersant (F1): Solsperse 5000 (manufactured by Lubrisol)

Dispersant (F2): Disperbyk-163 (BYK chemi)

Solvent (E1): n-butanol

Solvent (E2): Propylene glycol monomethyl ether acetate

&Lt; Preparation of Black Photosensitive Resin Composition &

Example 1 to 6 and Comparative Example 1 to 6.

A black photosensitive resin composition was prepared by the ordinary methods known in the art in the contents of Tables 3 and 4 below.

division Weight portion Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 (A) Coloring material 70.00 BK1 BK2 BK3 BK4 BK5 BK6 (B) binder resin 5.00 Synthesis Example 1 [ (C) Photopolymerizable compound 5.00 Dipentaerythritol hexaacrylate (KAYARAD DPHA; manufactured by Nippon Kayaku Co., Ltd.) (D) a photopolymerization initiator 1.00 -9- ethyl-6- (2-methyl-4-tetrahydropyranyloxybenzoyl) -9H-carbazol-3-yl] -1- (O- acetyloxime) (Irgacure OXE02; Produce) (E) Solvent 18.45 Propylene glycol monomethyl ether acetate (F1) Additive 0.50 Epoxy resin (SUMI-EPOXY ESCN-195XL; manufactured by Sumitomo Chemical Co., Ltd.) (F2) Additive 0.05 3-methacryloxypropyltrimethoxysilane

division Weight portion Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 (A) Coloring material 70.00 BK7 BK8 BK9 BK10 BK11 BK12 (B) binder resin 5.00 Synthesis Example 1 [ (C) Photopolymerizable compound 5.00 Dipentaerythritol hexaacrylate (KAYARAD DPHA; manufactured by Nippon Kayaku Co., Ltd.) (D) a photopolymerization initiator 1.00 -9- ethyl-6- (2-methyl-4-tetrahydropyranyloxybenzoyl) -9H-carbazol-3-yl] -1- (O- acetyloxime) (Irgacure OXE02; Produce) (E) Solvent 18.45 Propylene glycol monomethyl ether acetate (F1) Additive 0.50 Epoxy resin (SUMI-EPOXY ESCN-195XL; manufactured by Sumitomo Chemical Co., Ltd.) (F2) Additive 0.05 3-methacryloxypropyltrimethoxysilane

Experimental Example 1. Fabrication and measurement of colored substrate

A 2-inch square glass substrate (# 1737, manufactured by Corning Incorporated) was sequentially washed with a neutral detergent, water and alcohol, and then dried. The black photosensitive resin composition according to the examples and the comparative example was exposed to an exposure amount (365 nm) of 100 mJ / cm 2 on the glass substrate, and the film thickness after the firing when the development step was omitted was 1.0 μm, And then preliminarily dried in a clean oven at 100 DEG C for 3 minutes. After cooling, the substrate coated with the black photosensitive resin composition was irradiated with light at an exposure amount (365 nm) of 100 mJ / cm 2 using an ultra-high pressure mercury lamp (trade name: USH-250D) manufactured by Ushio DENKI CO., LTD. Thereafter, the resultant was fired at 220 캜 for 30 minutes to produce a colored substrate.

The optical density of the substrate thus prepared was measured using an optical density meter (manufactured by Exlite).

The transmittance of the substrate was measured at 950 nm using a near infrared spectrometer (VERTEX80 FT-IR spectrometer, manufactured by Bruker Optics).

The measurement results are shown in Tables 5 and 6 below.

division Reference value Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Optical density (OD / um) 1.5 or more 1.62 1.69 1.78 1.81 1.67 1.58 NearIR transmittance More than 30% 78% 52% 40% 31% 57% 57%

division Reference value Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Optical density (OD / um) 1.5 or more 1.40 1.83 1.30 1.45 1.20 1.03 NearIR transmission More than 30% 89% 20% 63% 65% 31% 35%

The substrates prepared in Examples 1 to 6 had optical densities and Near IR transmittances both exceeding the standard values, thereby producing a substrate having excellent optical density and near IR transmittance. On the other hand, the Near IR transmittance of the substrates prepared in Comparative Examples 1 to 6 exceeded the standard values except for Comparative Example 2, but optical densities were measured below the standard values except for Comparative Example 2, so that excellent substrates were not produced. Therefore, the substrates manufactured in Examples 1 to 6 can be usefully used for manufacturing color filters and display devices having improved physical properties and performance.

Claims

(A) a coloring material, (B) a binder resin, (C) a photopolymerizable compound, (D) a photopolymerization initiator and (E) A2) an organic pigment, wherein the (A2) organic pigment comprises CI Pigment Red 149 and C.I. (A) 5 to 20 parts by weight of (A1) carbon black, which is a black pigment, and (A2) 80 to 95 parts by weight of an organic pigment, based on 100 parts by weight of the solid content of the coloring material , (A2) CI contained in the organic pigment Pigment Red 149 and C.I. Pigment Blue 15: 6 each contain 30 to 65 parts by weight of the black photosensitive resin composition.

(B) a binder resin in an amount of 5 to 50 parts by weight, (C) a photopolymerizable compound (B), and (C) (D) 0.1 to 30 parts by weight of the photopolymerization initiator (D), and 60 to 90 parts by weight of the (E) solvent relative to 100 parts by weight of the black photosensitive resin composition.

A color filter comprising a black mattress or a black column spacer made of the black photosensitive resin composition of claim 1.

The color filter according to claim 3, wherein the black mattress or the black column spacer has an optical density of 1.5 / m or more.

A display device comprising the color filter of claim 3.