Pigment dispersion composition for black matrix, and pigment dispersion resist composition for black matrix

Abstract

To provide a pigment dispersion composition for black matrices that can form a black matrix with high light-shielding properties while having low reflectivity from the glass surface. [Solution] A pigment dispersion composition for a black matrix comprising carbon black, silica particles, a basic group-containing pigment dispersant, an acidic group-containing pigment dispersion aid, an alkali-soluble resin, and a solvent, wherein the silica particles are phenyl group-containing silica particles and / or (meth)acrylic group-containing silica particles, and the amount of silica particles is 2 parts by mass or more and 20 parts by mass or less per 100 parts by mass of carbon black.

Description

Technical Field

[0001] The present invention relates to a pigment dispersion composition for a black matrix and a pigment dispersion resist composition for a black matrix.

Background Art

[0002] Conventionally, a pigment dispersion composition for a black matrix containing carbon black, a pigment dispersant containing a basic group, an alkali-soluble resin, and a solvent, and a pigment dispersion resist composition for a black matrix containing the pigment dispersion composition for a black matrix, a photopolymerizable compound, and a photoinitiator are known (Patent Documents 1-2).

[0003] Also, in a pigment dispersion resist composition for a black matrix containing carbon black, an alkali-soluble resin, a photopolymerizable compound, etc., a composition containing a specific amount of hydrophobic silica fine particles is also known (Patent Document 3).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0005] Black matrices used in color filters require low reflectivity and high light-blocking properties, but the pigment dispersion compositions for black matrices disclosed in the above-mentioned patent document had room for improvement in these properties. In particular, regarding low reflectivity, demand for outdoor applications such as automotive and tablets has been increasing in recent years, and low reflectivity from the glass surface is required from the viewpoint of suppressing the decrease in visibility caused by the reflection of ambient light at the interface between the glass surface and the black matrix.

[0006] This invention has been made in view of the above circumstances, and aims to provide a pigment dispersion composition for a black matrix that can form a black matrix with high light-shielding properties while having low reflectivity from a glass surface. [Means for solving the problem]

[0007] In other words, the present invention relates to a pigment dispersion composition for a black matrix comprising carbon black, silica particles, a basic group-containing pigment dispersant, an acidic group-containing pigment dispersion aid, an alkali-soluble resin, and a solvent, wherein the silica particles are phenyl group-containing silica particles and / or (meth)acrylic group-containing silica particles, and the amount of silica particles is 2 parts by mass or more and 20 parts by mass or less per 100 parts by mass of carbon black.

[0008] Furthermore, the present invention relates to a pigment dispersion composition for a black matrix in which the silica particles are preferably 10 parts by mass or less per 100 parts by mass of carbon black.

[0009] Furthermore, the present invention relates to a black matrix pigment dispersion resist composition comprising the black matrix pigment dispersion composition, a photopolymerizable compound, and a photopolymerization initiator.

[0010] Furthermore, the present invention relates to a black matrix pigment dispersion resist composition in which the proportion of silica particles in the solid content of the black matrix pigment dispersion resist composition is preferably 0.4% by mass or more and 9.5% by mass or less. [Effects of the Invention]

[0011] Although the detailed mechanism of action of the pigment dispersion composition for black matrices of the present invention is not fully understood, it is presumed to be as follows.

[0012] The pigment dispersion composition for black matrix of the present invention, by using low refractive index silica particles in an amount of 2 to 20 parts by mass per 100 parts by mass of carbon black, can suppress the refractive index difference at the interface between the glass and the coating film, thereby forming a black matrix with high light-shielding properties while having low reflectivity from the glass surface. [Modes for carrying out the invention]

[0013] The pigment dispersion composition for black matrix of the present invention comprises carbon black, silica particles, a basic group-containing pigment dispersant, an acidic group-containing pigment dispersion aid, an alkali-soluble resin, and a solvent.

[0014] <Carbon Black> The carbon black can be any known carbon black used in pigment dispersion compositions for black matrices, such as neutral carbon black or acidic carbon black. Preferably, the carbon black has an average primary particle size of about 20 to 60 nm. The carbon black can be used alone or in combination of two or more types.

[0015] The neutral carbon black preferably has a pH in the range of 8 to 10. Examples of commercially available neutral carbon blacks include Printex 25 (average primary particle size 56 nm, pH 9.5), Printex 35 (average primary particle size 31 nm, pH 9.5), and Printex 65 (average primary particle size 21 nm, pH 9.5) from Orion Engineered Carbons, and MA#20 (average primary particle size 50 nm, pH 7.5), MA#30 (average primary particle size 30 nm, pH 8.0), and MA#40 (average primary particle size 40 nm, pH 8.0) from Mitsubishi Chemical Corporation.

[0016] The acidic carbon black is preferably in the pH range of 2 to 4. Examples of commercially available acidic carbon black include Raven 1080 (average primary particle size 28 nm, pH 2.4) and Raven 1100 (average primary particle size 32 nm, pH 2.9) from Columbia Chemicals, MA-8 (average primary particle size 24 nm, pH 3.0), MA-100 (average primary particle size 22 nm, pH 3.5), and MA#70 (average primary particle size 24 nm, pH 3.0) from Mitsubishi Chemical Corporation, and Special Black 250 (average primary particle size 56 nm, pH 3.0), Special Black 350 (average primary particle size 31 nm, pH 3.0), Special Black 550 (average primary particle size 25 nm, pH 4.0), NEROX 2500 (average primary particle size 56 nm, pH 3.0), and NEROX 3500 (average primary particle size 31 nm, pH 3.0) from Orion Engineered Carbons.

[0017] Typically, pH is measured at 25°C using a glass electrode after preparing an aqueous suspension by adding 1g of carbon black to 20mL of distilled water (pH 7.0) from which carbon dioxide has been removed, and mixing with a magnetic stirrer (German industrial standards DIN ISO 787 / 9). Also, the mean primary particle size is usually the arithmetic mean diameter obtained by electron microscopy observation. However, the pH and mean primary particle size of the commercially available carbon black mentioned above are catalog values.

[0018] The carbon black is preferably 60% by mass or more, more preferably 65% by mass or more, from the viewpoint of enhancing the light shielding property when forming the black matrix in the solid content of the pigment dispersion composition for the black matrix, and is preferably 90% by mass or less, more preferably 85% by mass or less, from the viewpoint of pigment dispersion.

[0019] <Silica particles> The silica particles are phenyl group-containing silica particles and / or (meth)acrylic group-containing silica particles. The silica particles can be used alone or in combination of two or more.

[0020] The phenyl group-containing silica particles only need to have a phenyl group on the surface of the silica particles, and are usually obtained by surface-treating silica particles with a silane compound. Examples of the phenyl group-containing silica particles include particles surface-treated with phenylsilane and particles surface-treated with phenylaminosilane. From the viewpoint of reducing the reflectance from the glass surface, particles surface-treated with phenylsilane are preferred. Examples of commercially available products of the phenyl group-containing silica particles include YA010C-SP3, YC100C-SP3 (both manufactured by Admatechs Co., Ltd.), etc.

[0021] The (meth)acrylic group-containing silica particles only need to have a (meth)acrylic group on the surface of the silica particles, and are usually obtained by surface-treating silica particles with a (meth)acrylic group-containing silane compound. Examples of the (meth)acrylic group-containing silica particles include particles surface-treated with 3-methacryloxypropyltrimethoxysilane and particles surface-treated with 3-methacryloxypropyltriethoxysilane. From the viewpoint of reducing the reflectance from the glass surface, particles surface-treated with 3-methacryloxypropyltrimethoxysilane are preferred. Examples of commercially available products of the (meth)acrylic group-containing silica particles include YA050C-SM2, YA100C-SM2 (both manufactured by Admatechs Co., Ltd.), etc.

[0022] From the viewpoint of obtaining a pigment dispersion resist composition for a black matrix having low reflectivity, the average primary particle diameter of the silica particles is preferably 5 nm or more, more preferably 10 nm or more, and from the viewpoint of preventing silica precipitation in the pigment dispersion composition and the resist composition, it is preferably 300 nm or less, more preferably 150 nm or less. Usually, the average primary particle diameter is the value of the arithmetic mean diameter by electron microscope observation, but in the case of commercially available products, the catalog value is referred to.

[0023] From the viewpoint of obtaining a pigment dispersion resist composition for a black matrix having low reflectivity, the BET specific surface area of the silica particles is 15 m 2 / g or more, more preferably 30 m 2 / g or more, and from the viewpoint of making the viscosities of the pigment dispersion composition and the resist composition appropriate, it is preferably 300 m 2 / g or less, more preferably 150 m 2 / g or less. Usually, the BET specific surface area is measured by a method such as JIS Z8830:2013, but in the case of commercially available products, the catalog value is referred to.

[0024] The silica particles are 2 parts by mass or more and 20 parts by mass or less with respect to 100 parts by mass of the carbon black. From the viewpoint of reducing the reflectivity from the glass surface, it is preferably 3 parts by mass or more, more preferably 5 parts by mass or more with respect to 100 parts by mass of the carbon black, and from the viewpoint of increasing the optical density (OD value), it is preferably 15 parts by mass or less, more preferably 10 parts by mass or less, and even more preferably 8 parts by mass or less. Further, the mass ratio of the carbon black to the silica particles (carbon black / silica particles) is preferably 10 or more, more preferably 15 or more.

[0025] <Basic group-containing pigment dispersant> The basic group-containing pigment dispersant only needs to be able to disperse the carbon black, and any known basic group-containing pigment dispersant used in pigment dispersion compositions for black matrices can be used. Examples include anionic surfactants, basic group-containing polyester pigment dispersants, basic group-containing acrylic pigment dispersants, basic group-containing urethane pigment dispersants, and basic group-containing carbodiimide pigment dispersants. As the basic group, primary, secondary, or tertiary amino groups are particularly preferred from the viewpoint of excellent dispersibility. The basic group-containing pigment dispersant can be used alone or in combination of two or more.

[0026] The basic group-containing pigment dispersant is preferably a polymer-type basic group-containing pigment dispersant because it provides good pigment dispersibility. Examples of the polymer-type basic group-containing pigment dispersant include basic group-containing urethane polymer pigment dispersants, basic group-containing polyester polymer pigment dispersants, and basic group-containing acrylic polymer pigment dispersants. Among these, basic group-containing urethane polymer pigment dispersants and basic group-containing acrylic polymer pigment dispersants are preferred. The basic group-containing urethane polymer pigment dispersant is more preferably a basic group-containing urethane polymer pigment dispersant having at least one selected from the group consisting of polyester chains, polyether chains, and polycarbonate chains.

[0027] The aforementioned basic group-containing pigment dispersant is preferably amine-valued at 5 to 200 mgKOH / g, and more preferably at 10 to 150 mgKOH / g, from the viewpoint of being able to reduce the viscosity of the pigment dispersion composition for the black matrix and to increase the concentration of carbon black in the coating film. The amine value indicates the total amount of free base and base, and is expressed as the number of mg of potassium hydroxide equivalent to the amount of hydrochloric acid required to neutralize 1 g of the sample.

[0028] The basic group-containing pigment dispersant is preferably in an amount of 1 to 100 parts by mass, and more preferably in an amount of 2 to 50 parts by mass, per 100 parts by mass of carbon black.

[0029] <Acidic group-containing pigment dispersant> The aforementioned acidic group-containing pigment dispersion aids are used to further improve the dispersibility of pigments. Examples include compounds in which acidic groups such as carboxyl groups and sulfonic acid groups are introduced to pigments such as lactam black, perylene compounds, diketopyrrolopyrrole compounds, azonaphthol compounds, dioxazine compounds, quinacridone compounds, phthalocyanine compounds and their metal complexes, anthraquinone, naphthalene, acridone, or triazine (pigment derivatives having acidic groups), and compounds obtained by neutralizing these with organic amines, etc. As the aforementioned acidic group-containing pigment derivatives, phthalocyanine-based (having a phthalocyanine skeleton) pigment derivatives having sulfonic acid groups are preferred from the viewpoint of good dispersibility of carbon black. The aforementioned acidic group-containing pigment dispersion aids can be used alone or in combination of two or more types.

[0030] The acidic group-containing pigment dispersion aid is preferably 0.1 to 20 parts by mass, and more preferably 1 to 10 parts by mass, per 100 parts by mass of carbon black.

[0031] <Alkali-soluble resin> The alkali-soluble resin is not particularly limited as long as it can dissolve in an alkaline developer, but a resin containing one or more anionic groups such as a carboxyl group, a sulfonic acid group, or a phosphonic acid group (-P(=O)(OH2)) is preferred. The alkali-soluble resin can be used alone or in combination of two or more types.

[0032] From the viewpoint of alkali developability, the acid value of the alkali-soluble resin is preferably 10 mg KOH / g or more and 300 mg KOH / g or less, and more preferably 20 mg KOH / g or more and 200 mg KOH / g or less.

[0033] The weight-average molecular weight of the alkali-soluble resin is preferably 5,000 or more, and more preferably 10,000 or more, from the viewpoint of resist film formation. The weight-average molecular weight of the alkali-soluble resin is preferably 100,000 or less, and more preferably 50,000 or less, from the viewpoint of improving solubility in alkaline developer.

[0034] The aforementioned weight-average molecular weight can be measured by gel permeation chromatography (GPC). For example, using a Water2690 GPC instrument (Waters Corporation) and a PLgel, 5μ, MIXED-D column (Polymer Laboratories), chromatography can be performed under the following conditions: tetrahydrofuran as the developing solvent, column temperature 25°C, flow rate 1 ml / min, RI detector, sample injection concentration 10 mg / ml, and injection volume 100 microliters. The weight-average molecular weight can then be determined as polystyrene equivalent.

[0035] Examples of the alkali-soluble resin include acrylic copolymer resins, maleic acid copolymer resins, polyester resins obtained by condensation polymerization, polyurethane resins, and cardo resins. Among these, cardo resins are preferred from the viewpoint of affinity with carbon black, heat resistance, and transparency.

[0036] The term "cardio resin" refers to an alkali-soluble resin having a cardiac skeleton, which is a skeleton in which two aromatic groups are single-bonded to a quaternary carbon atom, a ring carbon atom constituting a cyclic structure. Specific examples of alkali-soluble cardiac resins include, for example, ADEKA ARKLS WR-301 (manufactured by ADEKA Corporation), and Ogzol CR-TR1, CR-TR2, CR-TR3, CR-TR4, CR-TR5, and CR-TR6 (all manufactured by Osaka Gas Chemical Co., Ltd.).

[0037] The alkali-soluble resin is preferably in an amount of 2 to 45 parts by mass, and more preferably 3 to 15 parts by mass, per 100 parts by mass of carbon black.

[0038] <Solvent> The solvent can be any known solvent used in pigment dispersion compositions for black matrices. From the viewpoint of stably dispersing the pigment and sufficiently dissolving the basic group-containing pigment dispersant and the alkali-soluble resin, ester solvents, ether solvents, ether ester solvents, ketone solvents, aromatic hydrocarbon solvents, nitrogen-containing solvents, etc., are preferred. The solvent can be used alone or in combination of two or more.

[0039] Examples of the ester-based solvents include methyl 2-hydroxypropionate, ethyl 2-hydroxypropionate, ethyl 2-hydroxy-2-methylpropionate, methyl-3-methoxybutylpropionate, methyl 3-methoxypropionate, ethyl 3-methoxypropionate, methyl 3-ethoxypropionate, ethyl 3-ethoxypropionate, ethyl ethoxyethyl acetate, hydroxyacetic acid ester, and n-amyl formate. Examples of the ether-based solvents include ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monoisopropyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monobutyl ether, diethylene glycol diethyl ether, diethylene glycol dimethyl ether, and diethylene glycol methyl ethyl ether. Examples of the ether ester solvents include ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether acetate, propylene glycol monomethyl ether acetate, and propylene glycol monoethyl ether acetate. Examples of the ketone solvents include methyl isobutyl ketone, cyclohexanone, 2-heptanone, and δ-butyrolactone. Examples of the aromatic hydrocarbon solvents include toluene, xylene, and alkylnaphthalene. Examples of the nitrogen-containing solvents include N-methylpyrrolidone, N,N-dimethylformamide, and N,N-dimethylacetamide.

[0040] The proportion of the solvent in the black matrix pigment dispersion composition is preferably 40% by mass or more, more preferably 50% by mass or more, from the viewpoint of processability, and preferably 90% by mass or less, more preferably 80% by mass or less, from the viewpoint of dispersion stability.

[0041] In the pigment dispersion composition for the black matrix, the total proportion of the carbon black, the silica particles, the basic group-containing pigment dispersant, the acid group-containing pigment dispersion aid, the alkali-soluble resin, and the solvent is preferably 70% by mass or more, more preferably 80% by mass or more, even more preferably 90% by mass or more, and even more preferably 95% by mass or more.

[0042] The aforementioned black matrix pigment dispersion composition may be prepared by dispersing each of the above components using a roll mill, kneader, high-speed stirrer, bead mill, ball mill, sand mill, ultrasonic disperser, high-pressure dispersion device, etc. Alternatively, the aforementioned black matrix pigment dispersion composition may be prepared by mixing the composition in which carbon black is dispersed with the composition in which silica is dispersed.

[0043] <Pigment-dispersed resist composition for black matrix> The black matrix pigment dispersion resist composition of the present invention comprises the black matrix pigment dispersion composition, a photopolymerizable compound, and a photopolymerization initiator. The proportion of carbon black is preferably 30% to 80% by mass of the solid content of the black matrix pigment dispersion resist composition. Furthermore, the proportion of silica particles is preferably 0.4% to 9.5% by mass, more preferably 0.8% to 8% by mass, and even more preferably 1% to 7.5% by mass, from the viewpoint of improving the dispersion stability of the pigment and silica particles and further increasing the optical density (OD value) of the resist film.

[0044] <Photopolymerizable compound> The photopolymerizable compound can be a known photopolymerizable compound used in pigment-dispersed resist compositions for black matrices, such as monomers and oligomers having photopolymerizable unsaturated bonds. The photopolymerizable compound can be used alone or in combination of two or more.

[0045] Examples of monomers having one photopolymerizable unsaturated bond include alkyl methacrylates or acrylates such as methyl methacrylate, butyl methacrylate, 2-ethylhexyl methacrylate, methyl acrylate, butyl acrylate, and 2-ethylhexyl acrylate; aralkyl methacrylates or acrylates such as benzyl methacrylate and benzyl acrylate; alkoxyalkyl methacrylates or acrylates such as butoxyethyl methacrylate and butoxyethyl acrylate; and aminoalkyl methacrylates such as N,N-dimethylaminoethyl methacrylate and N,N-dimethylaminoethyl acrylate. Examples include methyl methacrylate or acrylate; methacrylic acid esters or acrylic acid esters of polyalkylene glycol monoalkyl ethers such as diethylene glycol monoethyl ether, triethylene glycol monobutyl ether, and dipropylene glycol monomethyl ether; methacrylic acid esters or acrylic acid esters of polyalkylene glycol monoaryl ethers such as hexaethylene glycol monophenyl ether; isovonyl methacrylate or acrylate; glycerol methacrylate or acrylate; and 2-hydroxyethyl methacrylate or acrylate.

[0046] Examples of monomers having two or more photopolymerizable unsaturated bonds include bisphenol A dimethacrylate, 1,4-butanediol dimethacrylate, 1,3-butylene glycol dimethacrylate, diethylene glycol dimethacrylate, glycerol dimethacrylate, neopentyl glycol dimethacrylate, polyethylene glycol dimethacrylate, polypropylene glycol dimethacrylate, tetraethylene glycol dimethacrylate, trimethylolpropane trimethacrylate, pentaerythritol trimethacrylate, pentaerythritol tetramethacrylate, dipentaerythritol tetramethacrylate, dipentaerythritol hexamethacrylate, and dipentaerythritol hexamethacrylate. Examples include erythritol pentamethacrylate, bisphenol A diacrylate, 1,4-butanediol diacrylate, 1,3-butylene glycol diacrylate, diethylene glycol diacrylate, glycerol diacrylate, neopentyl glycol diacrylate, polyethylene glycol diacrylate, polypropylene glycol diacrylate, tetraethylene glycol diacrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, dipentaerythritol tetraacrylate, dipentaerythritol hexaacrylate, and dipentaerythritol pentaacrylate.

[0047] Examples of oligomers having photopolymerizable unsaturated bonds include those obtained by appropriately polymerizing the monomers.

[0048] The photopolymerizable compound is preferably present in an amount of 2 to 20% by mass, and more preferably 4 to 15% by mass, of the solid content of the black matrix pigment dispersion resist composition.

[0049] The aforementioned photopolymerization initiator can be a known photopolymerization initiator used in pigment-dispersed resist compositions for black matrices, such as benzophenone, N,N'-tetraethyl-4,4'-diaminobenzophenone, 4-methoxy-4'-dimethylaminobenzophenone, benzyl, 2,2-diethoxyacetophenone, benzoin, benzoin methyl ether, benzoin isobutyl ether, benzyl dimethyl ketal, α-hydroxyisobutylphenone, thioxanthone, 2-chlorothioxanthone, 1-hydroxycyclohexylphenyl ketone, t-butylanthraquinone, 1-chloroanthraquinone, 2,3-dichloroanthraquinone, 3-chlor-2-methylanthraquinone, 2-ethylanthraquinone, 1,4-naphthoquinone, 1,2-benzoanthraquinone, 1,4-dimethylanthraquinone, 2-phenylanthraquinone, triazine-based photopolymerization initiators, oxime ester-based photopolymerization initiators, and the like. The aforementioned photopolymerization initiators can be used alone or in combination of two or more.

[0050] The photopolymerization initiator is preferably present in an amount of 0.1 to 15% by mass, and more preferably 1 to 10% by mass, of the solid content of the black matrix pigment dispersion resist composition.

[0051] The black matrix pigment-dispersed resist composition may further contain the above-mentioned alkali-soluble resin from the viewpoint of developability with an alkaline developer. Furthermore, the total amount of the alkali-soluble resin is preferably 10% by mass or more and 50% by mass or less of the solid content of the black matrix pigment-dispersed resist composition. Furthermore, the black matrix pigment-dispersed resist composition may further contain the above-mentioned solvent from the viewpoint of improving paintability. The total proportion of the solvent is preferably 50% by mass or more, and more preferably 70% by mass or more, of the black matrix pigment-dispersed resist composition.

[0052] The aforementioned pigment-dispersed resist composition for the black matrix may further contain additives such as leveling agents, antioxidants, and defoaming agents, if necessary.

[0053] The black matrix pigment dispersion resist composition may be prepared by stirring and mixing the black matrix pigment dispersion composition, a photopolymerizable compound, and a photopolymerization initiator using a stirring device or the like. [Examples]

[0054] The present invention will be described below with reference to examples, but the present invention is not limited to these examples.

[0055] <Preparation Examples 1-8, Comparative Preparation Examples 1-8> <Preparation of Pigment Dispersion Composition for Black Matrix> The various raw materials shown in Tables 1 and 2 were mixed to achieve the blending composition (mass%) shown in Tables 1 and 2, and then kneaded in a bead mill to prepare the black matrix pigment dispersion compositions for each preparation example and comparative preparation example.

[0056] <Examples 1-8, Comparative Examples 1-8> <Preparation of Pigment-Dispersed Resist Compositions for Black Matrix> The various raw materials shown in Tables 3 and 4 were mixed using a high-speed stirrer to achieve the blending composition (mass%) shown in Tables 3 and 4. The mixture was then filtered through a 0.5 μm pore size filter to prepare the black matrix pigment dispersion resist compositions for each example and comparative example.

[0057] <Evaluation of surface resistivity> Each of the above-mentioned pigment-dispersed resist compositions for black matrix was coated onto a glass substrate to a thickness of 1 μm using a spin coater, pre-baked at 100°C for 3 minutes, exposed with a high-pressure mercury lamp, and then post-baked at 230°C for 3 hours to obtain a black resist film formed only in solid areas. The surface resistance (Ω / □) of each solid area of ​​the obtained black resist film surface was measured using a micro-current meter R8340 and an optional shield box R12702A (both manufactured by Advance Co., Ltd.). The acceptable standard for surface resistance is 1.0E+8Ω / □ or higher, and preferably 1.0E+9Ω / □ or higher.

[0058] <Evaluation of Optical Density (OD value)> The optical density (OD value) of the black resist film in each solid area obtained above was measured using a Macbeth densitometer (TD-931, trade name, manufactured by Macbeth). The acceptable optical density is 3.5 or higher, and preferably 3.8 or higher.

[0059] <Evaluation of reflectance> The SCI reflectance (Y) (in %) from the glass surface side of each solid black resist film obtained above was measured using a spectrophotometer (CM-26d, product name, manufactured by Konica Minolta). The acceptable standard for reflectance is 6.3% or less, and preferably 6.0% or less.

[0060] [Table 1]

[0061] [Table 2]

[0062] [Table 3]

[0063] [Table 4]

[0064] In Table 1-4, NEROX3500 is carbon black (average primary particle size 31 nm, pH 3.0, manufactured by Orion Engineered Carbons). YA010C-SP3 is phenyl group-containing silica (average primary particle size 10 nm, manufactured by Admatex Corporation); YA100C-SP3 is phenyl group-containing silica (average primary particle size 100 nm, manufactured by Admatex Co., Ltd.); YA050C-SM2 is (meth)acrylic group-containing silica (average primary particle size 50 nm, manufactured by Admatex Co., Ltd.); YA100C-SM2 is (meth)acrylic group-containing silica (average primary particle size 100 nm, manufactured by Admatex Co., Ltd.); OX50 is untreated silica (average primary particle size 40 nm, manufactured by Evonik). CAB-O-SIL TG-C110 is silica surface-treated with hexamethyldisilazane (average primary particle size 110 nm, manufactured by Cabot Corporation). CAB-O-SIL TG-C191 is silica surface-treated with octylsilane (average primary particle size 110 nm, manufactured by Cabot Corporation); MZ-200 is made of zinc oxide (average primary particle size 50 nm, manufactured by Teika Corporation); UEP-50 is zirconium oxide (average primary particle size 70-270 nm, manufactured by Daiichi Kigenso Kagaku Kogyo Co., Ltd.); BYK-167 is a polyurethane polymer dispersant containing amino groups with polyester chains (manufactured by Bic Chemie, solids content 52% by mass); LPN6919 is an amino group-containing acrylic polymer pigment dispersant (manufactured by Bic Chemie, solids content 58%); SS5000S is a phthalocyanine-based dye derivative containing a sulfonic acid group (manufactured by Lubrizol). WR-301 is a cardo resin (manufactured by ADEKA, solids content 45%, acid value 100 mg KOH / g); PGMEA represents propylene glycol monomethyl ether acetate.

[0065] In Table 3-4, DPHA is dipentaerythritol hexaacrylate; OXE02 is an oxime ester-based photopolymerization initiator (manufactured by BASF Japan). Megafac F554 is an oligomer containing fluorine-containing and lipophilic groups (manufactured by DIC Corporation, solid content 100% by mass).

Claims

1. A pigment dispersion composition for a black matrix comprising carbon black, silica particles, a basic group-containing pigment dispersant, an acidic group-containing pigment dispersion aid, an alkali-soluble resin, and a solvent, The silica particles are phenyl group-containing silica particles and / or (meth)acrylic group-containing silica particles, The pigment dispersion composition for a black matrix is ​​characterized in that the silica particles are present in an amount of 2 parts by mass or more and 20 parts by mass or less per 100 parts by mass of carbon black.

2. The pigment dispersion composition for a black matrix according to claim 1, characterized in that the silica particles are 10 parts by mass or less per 100 parts by mass of carbon black.

3. A black matrix pigment dispersion resist composition characterized by comprising the black matrix pigment dispersion composition described in claim 1 or 2, a photopolymerizable compound, and a photopolymerization initiator.

4. The black matrix pigment dispersion resist composition according to claim 3, characterized in that the proportion of silica particles in the solid content of the black matrix pigment dispersion resist composition is 0.4% by mass or more and 9.5% by mass or less.

Images