A pigment dispersion liquid, a photoresist composition, a photosensitive glass, and a liquid crystal display device

Abstract

The application provides a pigment dispersion liquid, a photoresist composition, a photosensitive glass and a liquid crystal display device, and relates to the field of liquid crystal display devices. The pigment dispersion liquid comprises a black colorant; the black colorant comprises carbon black A and carbon black B; the oil absorption value of the carbon black A is 80 mL / 100 g-100 mL / 100 g; and the oil absorption value of the carbon black B is 50 mL / 100 g-70 mL / 100 g. By using the carbon black A and the carbon black B with different oil absorption values as the colorant, even in the case of a higher pigment filling amount and a narrower line width, a black matrix pixel with excellent pixel edge collimation and a good cross-section slope angle can be obtained.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of liquid crystal display devices, in particular to a pigment dispersion liquid, a photoresist composition, a photosensitive glass and a liquid crystal display device. BACKGROUND

[0002] In the picture display area of a liquid crystal display device, a film layer (black matrix) with light shielding property is provided, which is mainly used to prevent leakage from the backlight from being reflected in the picture, and to prevent color mixing from causing rendering to be reflected in the picture, thereby helping to improve display characteristics (contrast ratio and color purity).

[0003] With the development of display technology, the black matrix requires higher light shielding property, narrower line width and good engineering matching, but as the amount of colorant continues to increase, it is easy to occur in the process of manufacturing the black matrix that the pixel edge collimation is poor and the slope angle is not easy to control, which leads to the problem that the color film layer and the black matrix cannot be normally matched, causing Peeling, residue and other problems, which greatly affects the display effect of the device. SUMMARY

[0004] The purpose of the present application is to provide a pigment dispersion liquid, a photoresist composition, a photosensitive glass and a liquid crystal display device to solve the above problems.

[0005] To achieve the above purpose, the first aspect of the present application provides a pigment dispersion liquid, comprising a black colorant;

[0006] The black colorant comprises carbon black A and carbon black B;

[0007] The oil absorption value of the carbon black A is 80 mL / 100 g-100 mL / 100 g;

[0008] The oil absorption value of the carbon black B is 50 mL / 100 g-70 mL / 100 g.

[0009] Optionally, the pigment dispersion liquid satisfies at least one of the following conditions:

[0010] A. The mass ratio of the carbon black A and the carbon black B is 5-80:20-95;

[0011] B. The particle size of the carbon black A and the carbon black B is independently 20 nm-60 nm;

[0012] C. The pH of the carbon black A is 2-5;

[0013] D. The pH of the carbon black B is 2-5;

[0014] E. The raw materials of the pigment dispersion liquid, based on 100% by mass, comprise:

[0015] Carbon black A 10% - 70%, carbon black B 10% - 70%, dispersant 5% - 65%, first alkali-soluble resin 5% - 65%, first organic solvent 10% - 70%.

[0016] Optionally, the pigment dispersion liquid satisfies at least one of the following conditions:

[0017] A. The mass ratio of the carbon black A and the carbon black B is 10-70:30-90.

[0018] B. The dispersant comprises a urethane high molecular dispersant and / or an acrylic high molecular dispersant;

[0019] C. The first alkali-soluble resin comprises an alkali-soluble Cardo resin and / or an acrylic copolymer resin;

[0020] D. The first organic solvent comprises one or more of an ether organic solvent, an ether ester organic solvent, a ketone organic solvent, an alcohol solvent, and a nitrogen-containing organic solvent.

[0021] The second aspect of the present application provides a photoresist composition, which comprises, based on 100% by mass:

[0022] The pigment dispersion liquid 10% - 70%, the second alkali-soluble resin 5% - 45%, the photopolymerization initiator 0.2% - 5%, the photopolymerizable compound 0.2% - 50%, and the second organic solvent 10% - 50%.

[0023] Optionally, the second alkali-soluble resin comprises an alkali-soluble Cardo resin and / or an acrylic copolymer resin.

[0024] Optionally, the photopolymerization initiator comprises one or more of 1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]ethanone 1-(O-acetyloxime), benzophenone, 4,4'-bis(N,N-diethylamino)benzophenone, 4-methoxy-4'-dimethylaminobenzophenone, 2,2-diethoxyacetophenone, benzoin, benzoin methyl ether, benzoin isobutyl ether, benzyl dimethyl ketal, alpha-hydroxyisobutyrylbenzophenone, thioxanthone, 2-chlorothioxanthone, 1-hydroxycyclohexylbenzophenone, tert-butyl anthraquinone, 1-chloroanthraquinone, 2,3-dichloroanthraquinone, 3-chloro-2-methylanthraquinone, 2-ethylanthraquinone, 1,4-naphthoquinone, 1,2-benzoxanthone, 1,4-dimethylanthraquinone, 2-phenylanthraquinone, 2-methyl-1-(4-methylthiophenyl)-2-morpholino-1-propanone, 2-methyl-1[4-(methylthio)phenyl]-2-morpholinopropane-1-ketone.

[0025] Optionally, the photopolymerizable compound includes an acrylic compound and / or a methacrylate compound, and the acrylic compound and the methacrylate compound each independently contain three or more ethylenically unsaturated groups and meet at least one of the following conditions:

[0026] A. The acrylic compound includes one or more of pentaerythritol triacrylate, pentaerythritol tetraacrylate, sorbitol triacrylate, sorbitol tetraacrylate, sorbitol pentaacrylate, sorbitol hexaacrylate, trimethylolpropane triacrylate, dipentaerythritol pentaacrylate, and dipentaerythritol hexaacrylate;

[0027] B. The methacrylate compound includes one or more of trimethylolpropane trimethacrylate, trimethylolethane trimethacrylate, pentaerythritol trimethacrylate, pentaerythritol tetramethacrylate, dipentaerythritol hexamethacrylate, sorbitol trimethacrylate, and sorbitol tetramethacrylate.

[0028] Optionally, the second organic solvent includes one or more of ether organic solvents, ether ester organic solvents, ketone organic solvents, alcohol solvents, and nitrogen-containing organic solvents.

[0029] The third aspect of the present application provides a photosensitive glass comprising the photoresist composition.

[0030] A fourth aspect of the present application provides a liquid crystal display device comprising the aforementioned photosensitive glass.

[0031] Compared with the prior art, the advantages of this application include:

[0032] The pigment dispersion liquid provided by the application has smaller oil absorption value, and the carbon black with smaller oil absorption value has poor adsorption capacity for the solvent, alkali-soluble resin and nearby carbon black particles, is more easily dissolved by the alkali solution in the developing process, causes local peeling, the edge becomes more irregular, and when the film layer is softened in the post-curing process, the flow is more likely to occur, causing the slope angle to become worse and the edge serration to be aggravated. The carbon black with larger oil absorption value has strong adsorption capacity for the alkali-soluble resin and nearby carbon black particles, has smaller flowability in the film layer, has poor dispersion performance, is not easily dissolved by the alkali solution in the developing process, causes increased residue, and even the film layer cannot be peeled off. Therefore, the carbon black with larger oil absorption value is introduced into the carbon black with smaller oil absorption value, can play a supporting role in the film layer, reduces the flowability of the film layer, can effectively improve the edge collimation, and can optimize the developing property. The carbon black with larger oil absorption value has strong adsorption, can be used as a support, improves the edge serration caused by the over-strong developing of the carbon black with smaller oil absorption value, and the carbon black with smaller oil absorption value is easily dissolved, and can improve the poor developing of the carbon black with larger oil absorption value. By using the two kinds of carbon black A and carbon black B with different oil absorption values as colorants, even under higher pigment filling amount and narrower line width, excellent pixel edge collimation and good cross-sectional slope angle of the black matrix pixel can be obtained.

[0033] The photoresist composition provided by the application has excellent pixel edge collimation and cross-sectional angle.

[0034] The photosensitive glass and liquid crystal display device provided by the application have good shading effect. DETAILED DESCRIPTION

[0035] As used herein:

[0036] "Made from" is synonymous with "comprising". The terms "comprising", "including", "having" or "with" as used herein, are meant to be interpreted open-ended. For example, a composition, step, method, article, or apparatus that comprises a list of elements is not necessarily limited to those elements but can include other elements not expressly listed or inherent to such composition, step, method, article, or apparatus.

[0037] The conjunction "consisting of" excludes any unrecited elements, steps, or components. If used in the claims, this phrase shall not be construed to mean that the noted non-excluded elements or steps are essential. The phrase "consisting of shall only limit the claim to elements described in that clause; other elements not described in the clause are excluded from the claim as a whole.

[0038] When an amount, concentration, or other value or parameter is expressed as a range, a preferred range, or a range defined by a series of upper preferred values ​​and lower preferred values, this should be understood as specifically disclosing all ranges formed by any pairing of any range upper limit or preferred value with any range lower limit or preferred value, regardless of whether the range is disclosed alone. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted as including the range "1 to 4", "1 to 3", "1 to 2", "1 to 2 and 4 to 5", "1 to 3 and 5", etc. When a numerical range is described herein, unless otherwise stated, the range is intended to include its end values ​​and all integers and fractions within the range.

[0039] In these examples, parts and percentages are by mass unless otherwise indicated.

[0040] "Parts by mass" refers to the basic unit of measurement used to express the mass ratio of multiple components. One part can represent any unit of mass, such as 1g or 2.689g. If we say that the mass of component A is a parts and the mass of component B is b parts, this means the ratio of the mass of component A to the mass of component B is a:b. Alternatively, we could say that the mass of component A is aK and the mass of component B is bK (K is an arbitrary number representing a multiplication factor). It's important to note that, unlike parts by mass, the sum of the mass of all components is not limited to 100 parts.

[0041] "And / or" is used to indicate that one or both of the stated situations may occur, for example, A and / or B includes (A and B) and (A or B).

[0042] A first aspect of the present application provides a pigment dispersion comprising a black colorant;

[0043] The black colorant includes carbon black A and carbon black B;

[0044] The oil absorption value of the carbon black A is 80mL / 100g-100mL / 100g;

[0045] Optionally, the oil absorption value of carbon black A can be 80 mL / 100 g, 85 mL / 100 g, 90 mL / 100 g, 95 mL / 100 g, 100 mL / 100 g, or any value between 80 mL / 100 g and 100 mL / 100 g;

[0046] The oil absorption value of the carbon black B is 50 mL / 100 g to 70 mL / 100 g.

[0047] Optionally, the oil absorption value of the carbon black B can be 50 mL / 100 g, 55 mL / 100 g, 60 mL / 100 g, 65 mL / 100 g, 70 mL / 100 g, or any value between 50 mL / 100 g and 70 mL / 100 g.

[0048] In some embodiments, the pigment dispersion liquid satisfies at least one of the following conditions:

[0049] A. The mass ratio of the carbon black A and the carbon black B is 5-80:20-95;

[0050] Optionally, the mass ratio of the carbon black A and the carbon black B can be 5:20, 5:30, 5:50, 5:70, 5:90, 5:95, 10:30, 30:30, 40:30, 50:30, 60:30, 70:30, 80:20, or any value between 5-80:20-95;

[0051] It should be noted that when the mass ratio of the carbon black A and the carbon black B is higher than 80:20, there is a case of high system viscosity, poor storage stability, and increased surface roughness; when the mass ratio of the carbon black A and the carbon black B is lower than 5:95, there is a case of not obvious edge improvement effect;

[0052] B. The particle size of the carbon black A and the carbon black B is independently 20 nm-60 nm;

[0053] Optionally, the particle size of the carbon black A and the carbon black B can be independently 20 nm, 30 nm, 40 nm, 50 nm, 60 nm, or any value between 20 nm and 60 nm;

[0054] C. The pH of the carbon black A is 2-5;

[0055] Optionally, the pH of the carbon black A can be 2, 3, 4, 5, or any value between 2 and 5;

[0056] D. The pH of the carbon black B is 2-5;

[0057] Optionally, the pH of the carbon black B can be 2, 3, 4, 5, or any value between 2 and 5;

[0058] E. The raw materials of the pigment dispersion liquid, by mass, include:

[0059] 10%-70% of the carbon black A, 10%-70% of the carbon black B, 5%-65% of the dispersant, 5%-65% of the first alkali-soluble resin, and 10%-70% of the first organic solvent.

[0060] Optionally, the raw materials of the pigment dispersion liquid, based on 100% by mass, can include: 10%, 20%, 30%, 40%, 50%, 60%, 70%, or any value between 10% and 70% of carbon black A, 10%, 20%, 30%, 40%, 50%, 60%, 70%, or any value between 10% and 70% of carbon black B, 5%, 10%, 20%, 30%, 40%, 50%, 60%, 65%, or any value between 5% and 65% of the dispersant, 5%, 10%, 20%, 30%, 40%, 50%, 60%, 65%, or any value between 5% and 65% of the first alkali-soluble resin, and 10%, 20%, 30%, 40%, 50%, 60%, 70%, or any value between 10% and 70% of the first organic solvent.

[0061] Preferably, the raw materials of the pigment dispersion liquid, based on 100% by mass, can include:

[0062] 10% to 60% of carbon black A, 20% to 60% of carbon black B, 5% to 45% of the dispersant, 5% to 45% of the first alkali-soluble resin, and 10% to 50% of the first organic solvent.

[0063] Further preferably, the raw materials of the pigment dispersion liquid, based on 100% by mass, can include:

[0064] 20% to 50% of carbon black A, 20% to 50% of carbon black B, 5% to 35% of the dispersant, 5% to 35% of the first alkali-soluble resin, and 20% to 50% of the first organic solvent.

[0065] In some embodiments, the pigment dispersion liquid satisfies at least one of the following conditions:

[0066] A. The mass ratio of the carbon black A to the carbon black B is 10-70:30-90;

[0067] Optionally, the mass ratio of the carbon black A to the carbon black B can be 10:30, 10:35, 10:45, 10:55, 10:65, 10:75, 10:85, 20:30, 30:30, 40:30, 50:30, 60:30, 70:30, or any value between 10-70:30-90;

[0068] B. The dispersant includes a urethane-based high-molecular dispersant and / or an acrylic high-molecular dispersant;

[0069] C. The first alkali-soluble resin includes an alkali-soluble Cardo resin and / or an acrylic copolymer resin;

[0070] Note that the first alkali-soluble resin has alkali-soluble groups such as carboxyl groups, hydroxyl groups, acid anhydrides, and the like, and can improve developability and pattern formability. In addition, the alkali-soluble resin can also be used as a binder and a dispersant, functions as a binder with respect to the above-described black colorant, and has solubility with respect to a developing solution used in a developing process thereof, particularly an alkali developing solution, when a black matrix is manufactured.

[0071] D. The first organic solvent includes one or more of an ether-based organic solvent, an ether ester-based organic solvent, a ketone-based organic solvent, an alcohol-based solvent, and a nitrogen-containing organic solvent.

[0072] The first organic solvent has a boiling point of 100°C to 200°C. Preferably, the first organic solvent includes propylene glycol monomethyl ether acetate.

[0073] Note that, in the preparation of the carbon black A and carbon black B composition, the components can be uniformly mixed, or the components can be dissolved and dispersed in a solvent and then sequentially mixed. The order of addition and the conditions for mixing are not particularly limited, and, for example, all of the components can be dissolved and dispersed in a solvent to prepare the composition. Alternatively, the components can be appropriately provided as two or more solutions and dispersions, and the solutions and dispersions can be mixed at the time of use (at the time of coating) to prepare the composition.

[0074] In addition, as needed, the carbon black is preferably dispersed together with a resin, an organic solvent, a pigment derivative, and other components to prepare a pigment dispersion liquid. The pigment dispersion liquid is mixed with other components of the coloring composition to prepare the coloring composition.

[0075] The pigment dispersion liquid can be prepared by dispersing the carbon black having a small oil absorption value and the carbon black having a large oil absorption value separately, or by simultaneously dispersing (co-dispersing) the carbon black having a small oil absorption value and the carbon black having a large oil absorption value. Co-dispersion is preferable, and according to this method, the dispersion stability of the carbon black compound can be improved.

[0076] In the preparation of the carbon black A and carbon black B composition, a filter is preferably used for filtration for the purpose of removing impurities and reducing defects. As the filter, a filter used in the related art for filtration and the like can be used without particular limitation. Examples of the filter include a filter using a fluororesin such as polytetrafluoroethylene (PTFE), a polyamide-based resin such as nylon (for example, nylon-6, nylon-6,6), a polyethylene resin, a polypropylene (PP) resin (including a high-density polypropylene resin and an ultrahigh molecular weight polypropylene resin), and the like. Among these, polypropylene (including high-density polypropylene) and nylon are preferable.

[0077] The pore size of the filter is preferably about 0.01 μm to about 7.0 μm, more preferably about 0.01 μm to about 3.0 μm, and further preferably about 0.05 μm to about 0.5 μm. By setting the pore size within this range, fine impurities that hinder the production of a uniform and smooth composition can be reliably removed in a later process. In addition, a fibrous filter material such as polypropylene fiber, nylon fiber, glass fiber, or the like can be used as the filter material.

[0078] In the case where a filter is used, different filters can be combined. In this case, the filtration in the first filter can be performed only once, or can be performed two or more times.

[0079] In addition, different pore sizes can be combined in the first filter within the above range. In this case, the pore size can be referred to the nominal value of the filter manufacturer.

[0080] The second filter can be formed of the same material as the first filter.

[0081] The filtration by the first filter can be performed using only the dispersion liquid, or the second filtration can be performed after mixing other components.

[0082] The second aspect of the present application provides a photoresist composition, which includes, based on 100% by mass:

[0083] The photoresist composition includes, based on 100% by mass:

[0084] The photoresist composition includes, based on 100% by mass:

[0085] The photoresist composition includes, based on 100% by mass:

[0086] In some embodiments, the second alkali-soluble resin includes an alkali-soluble Cardo resin and / or an acrylic copolymer resin.

[0087] In some embodiments, the photopolymerization initiator includes one or more of 1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]ethanone 1-(O-acetyloxime), benzophenone, 4,4'-bis(N,N-diethylamino)benzophenone, 4-methoxy-4'-dimethylaminobenzophenone, 2,2-diethoxyacetophenone, benzoin, benzoin methyl ether, benzoin isobutyl ether, benzyl dimethyl ketal, a-hydroxyisobutyrylbenzophenone, thioxanthone, 2-chlorothioxanthone, 1-hydroxycyclohexylbenzophenone, t-butylanthraquinone, 1-chloroanthraquinone, 2,3-dichloroanthraquinone, 3-chloro-2-methylanthraquinone, 2-ethylanthraquinone, 1,4-naphthoquinone, 1,2-benzanthrone, 1,4-dimethylanthraquinone, 2-phenylanthraquinone, 2-methyl-1-(4-methylthiophenyl)-2-morpholino-1-propanone.

[0088] Note that the photopolymerization initiator is a compound that generates a radical active species by bond cleavage and / or reaction by exposure to light, and by the radical active species, a compound having 2 or more radical polymerizable groups is subjected to photocuring, and a pattern can be formed; the photopolymerization initiator also includes a cationic photopolymerization initiator that is capable of decomposing into a cation or a protonic acid by the action of light, and thereby initiating a cationic polymerization reaction to form a pattern.

[0089] In some embodiments, the photopolymerizable compound includes an acrylic compound and / or a methacrylate compound, each of the acrylic compound and the methacrylate compound independently containing 3 or more ethylenic unsaturated groups, and satisfying at least one of the following conditions:

[0090] A. The acrylic compound includes one or more of pentaerythritol triacrylate, pentaerythritol tetraacrylate, sorbitol triacrylate, sorbitol tetraacrylate, sorbitol pentaacrylate, sorbitol hexaacrylate, trimethylolpropane triacrylate, dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate.

[0091] B. The methacrylate compound includes one or more of trimethylolpropane trimethacrylate, trimethyloloethane trimethacrylate, pentaerythritol trimethacrylate, pentaerythritol tetramethacrylate, dipentaerythritol hexamethacrylate, sorbitol trimethacrylate, sorbitol tetramethacrylate.

[0092] Note that, in addition, a cured product of the photopolymerizable compound (monomer) is ultimately filled as an acrylic resin component in the film of the pixel as an alkali-soluble resin.

[0093] In some embodiments, the second organic solvent comprises one or more of an ether organic solvent, an ether ester organic solvent, a ketone organic solvent, an alcohol solvent, a nitrogen-containing organic solvent.

[0094] It is to be noted that the second organic solvent has a boiling point of 100-200°C; preferably, the second organic solvent comprises propylene glycol monomethyl ether acetate (PMA).

[0095] In some embodiments, the ether organic solvent comprises one or more of 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, diethylene glycol methyl ethyl ether.

[0096] In some embodiments, the ether ester organic solvent comprises one or more of ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate.

[0097] In some embodiments, the ketone organic solvent comprises one or more of methyl isobutyl ketone, cyclohexanone, 2-heptanone, δ-butyrolactone.

[0098] In some embodiments, the alcohol solvent comprises one or more of 2-hydroxypropionic acid methyl ester, 2-hydroxypropionic acid ethyl ester, 2-hydroxy-2-methylpropionic acid ethyl ester, 3-methyl-3-methoxybutyl propionate, 3-methoxypropionic acid methyl ester, 3-methoxypropionic acid ethyl ester, 3-ethoxypropionic acid methyl ester, 3-ethoxypropionic acid ethyl ester, ethoxyacetic acid ethyl ester, hydroxyacetic acid ethyl ester, n-pentyl formate, and the like ester organic solvents; one or more of methanol, ethanol, isopropanol, butanol.

[0099] In some embodiments, the nitrogen-containing organic solvent comprises one or more of N-methylpyrrolidone, N,N-dimethylformamide, N,N-dimethylacetamide.

[0100] The third aspect of the present application provides a photosensitive glass comprising the photoresist composition.

[0101] The fourth aspect of the present application provides a liquid crystal display device comprising the photosensitive glass.

[0102] The embodiments of the present application will be described in detail below with specific examples, but those skilled in the art will understand that the following examples are only for illustration of the present application and should not be regarded as limiting the scope of the present application. If the specific conditions are not specified in the examples, the conventional conditions or the conditions recommended by the manufacturer are used. If the reagents or instruments used are not specified by the manufacturer, they are all conventional products that can be purchased on the market.

[0103] The raw materials used in the examples and comparative examples are all commercially available, and information on some of them is as follows.

[0104] Carbon black:

[0105] MA-100, pH 3.5, average primary particle diameter 24 nm, DBP oil absorption 100 mL / 100 g, manufactured by Mitsubishi Chemical Corporation;

[0106] MA-8, pH 3.0, average primary particle diameter 24 nm, DBP oil absorption 57 mL / 100 g, manufactured by Mitsubishi Chemical Corporation;

[0107] Dispersant: DISPERBYK 161, solid content 30%, manufactured by BYK-Chemie;

[0108] Resin: RD-SV-200, solid content 40%, manufactured by Japan Catalyst;

[0109] Organic solvent: PGMEA (propylene glycol monomethyl ether acetate), PMA;

[0110] Photopolymerization initiator: OXE 01, manufactured by BASF Corporation;

[0111] Photopolymerizable compound (monomer): DPHA (dipentaerythritol hexaacrylate), manufactured by Nippon Kayaku Co, Ltd.

[0112] Example 1

[0113] The first aspect of the present example provides a pigment dispersion liquid, designated as Pigment Dispersion Liquid-1, the raw materials of which are MA-100, MA-8, dispersant DISPERBYK 161, alkali-soluble resin: RD-SV-200, organic solvent PGMEA (propylene glycol monomethyl ether acetate);

[0114] The preparation method of Pigment Dispersion Liquid-1 is to mix the above raw materials and then mix them for 5 hours with a bead mill (high-pressure disperser NANO-3000-10 with a pressure-reducing mechanism, manufactured by Bead Mill Co., Ltd.), and the amount of Pigment Dispersion Liquid-1 used can be seen in Table 1.

[0115] The present example also provides a photoresist composition and a preparation method thereof, the raw materials of which include the above Pigment Dispersion Liquid-1, resin RD-SV-200, photopolymerization initiator OXE 01, photopolymerizable compound (monomer) DPHA (dipentaerythritol hexaacrylate), and organic solvent PMA.

[0116] The preparation method is as follows: the above raw materials are mixed under yellow light, stirred for 4 h, and filtered using a filter core with a pore size of 0.5 um to obtain the pigment dispersion liquid, and the amount of each raw material is shown in Table 2.

[0117] Example 2

[0118] This example provides a pigment dispersion liquid, named pigment dispersion liquid-2, which is different from example 1 in that the amount of raw materials of pigment dispersion liquid-2 is different.

[0119] This example also provides a photoresist composition, which has the same preparation method as example 1, except that the pigment dispersion liquid-1 is replaced by the pigment dispersion liquid-2 prepared in this example.

[0120] Example 3

[0121] This example provides a pigment dispersion liquid, named pigment dispersion liquid-3, which is different from example 1 in that the amount of raw materials of pigment dispersion liquid-3 is different.

[0122] This example also provides a photoresist composition, which has the same preparation method as example 1, except that the pigment dispersion liquid-1 is replaced by the pigment dispersion liquid-3 prepared in this example.

[0123] Example 4

[0124] This example provides a pigment dispersion liquid, named pigment dispersion liquid-4, which is different from example 1 in that the amount of raw materials of pigment dispersion liquid-4 is different.

[0125] This example also provides a photoresist composition, which has the same preparation method as example 1, except that the pigment dispersion liquid-1 is replaced by the pigment dispersion liquid-4 prepared in this example.

[0126] Example 5

[0127] This example provides a pigment dispersion liquid, named pigment dispersion liquid-5, which is different from example 1 in that the amount of raw materials of pigment dispersion liquid-5 is different.

[0128] This example also provides a photoresist composition, which has the same preparation method as example 1, except that the pigment dispersion liquid-1 is replaced by the pigment dispersion liquid-5 prepared in this example.

[0129] Comparative Example 1

[0130] This comparative example provides a pigment dispersion liquid, named pigment dispersion liquid-6, which is different from example 1 in that the amount of raw materials of pigment dispersion liquid-4 is different, and the mass ratio of MA-100 and MA-8 is 22.5:2.5.

[0131] The present comparative example also provides a photoresist composition, which is prepared in the same manner as in Example 1, except that the pigment dispersion-1 is replaced by the pigment dispersion-6 prepared in the present comparative example.

[0132] Comparative Example 2

[0133] The present comparative example provides a pigment dispersion, which is named as pigment dispersion-7, and the difference from Example 1 is that the mass ratio of MA-100 and MA-8 in the pigment dispersion-5 is 1:24.

[0134] The present comparative example also provides a photoresist composition, which is prepared in the same manner as in Example 1, except that the pigment dispersion-1 is replaced by the pigment dispersion-7 prepared in the present comparative example.

[0135] Comparative Example 3

[0136] The present comparative example provides a pigment dispersion, which is named as pigment dispersion-8, and the difference from Example 1 is that the MA-100 is not set in the pigment dispersion-7.

[0137] The present comparative example also provides a photoresist composition, which is prepared in the same manner as in Example 1, except that the pigment dispersion-1 is replaced by the pigment dispersion-8 prepared in the present comparative example.

[0138] Comparative Example 4

[0139] The present comparative example provides a pigment dispersion, which is named as pigment dispersion-9, and the difference from Example 1 is that the MA-8 is not set in the pigment dispersion-8.

[0140] The present comparative example also provides a photoresist composition, which is prepared in the same manner as in Example 1, except that the pigment dispersion-1 is replaced by the pigment dispersion-9 prepared in the present comparative example.

[0141] The data of the types and mass amounts of the raw materials of the pigment dispersions provided in Examples 1-5 and Comparative Examples 1-4 are shown in Table 1, and the edge collimation and slope angle tests of the pigment dispersions provided in Examples 1-5 and Comparative Examples 1-4 are also recorded in Table 1.

[0142] Table 1 Data related to pigment dispersions

[0143]

[0144] The data of the types and mass amounts of the raw materials of the photoresist compositions provided in Examples 1-5 and Comparative Examples 1-4 are shown in Table 2.

[0145] Table 2 Data of raw materials of photoresist compositions

[0146]

[0147] And the edge collimation and slope angle and other performance tests were also carried out on the photoresist compositions provided in Examples 1-5 and Comparative Examples 1-4, which can be seen in Table 3.

[0148] Table 3 Performance test of photoresist composition

[0149]

[0150] The edge collimation test method is as follows: the pigment dispersion liquid or photoresist composition prepared from the examples and comparative examples is spin-coated on a blank glass of 7cm*7cm, the film thickness is controlled at about 1.2μm by the rotation speed, then baked at 100℃ for 3min, set 40mj exposure amount for full exposure, after developing with alkaline developer, the surface residual developing solution is washed away with water, the glass substrate is cut into samples and placed on SEM to observe the pixel edge;

[0151] Evaluation criteria:

[0152] ◎: no sawtooth shape of the pattern edge part is observed;

[0153] ○: part of the sawtooth shape of the pattern edge part is observed;

[0154] ×: peeling or sawtooth shape of the pattern edge part is observed.

[0155] The slope angle test method is as follows: the pigment dispersion liquid or photoresist composition prepared from the examples and comparative examples is spin-coated on a blank glass of 7cm*7cm, the film thickness is controlled at about 1.2μm by the rotation speed, then baked at 100℃ for 3min, set 40mj exposure amount for full exposure, after developing with alkaline developer, the surface residual developing solution is washed away with water, placed in an oven with a temperature of 230℃ and baked for 30min, the glass substrate is cut into samples and placed on SEM to observe the angle between the pixel edge and the substrate;

[0156] Evaluation criteria:

[0157] ◎: 30°-60°;

[0158] ○: >60°;

[0159] ×: <30°.

[0160] Analysis:

[0161] From the above test results, it can be seen that the edge alignment and slope angle of Comparative Examples 1-4, which use MA-100 and MA-8 in a mass ratio outside the range of 5-80:20-95, are poor. It is presumed that Comparative Example 1 and Comparative Example 4 have a strong development dissolution because of the excessive use of MA-8 having a low oil absorption value, and thus the edge alignment and slope angle of the patterns are poor. It is presumed that Comparative Example 2 and Comparative Example 3 have a reduced dispersion stability because of the excessive use of MA-100 having a high oil absorption value, and thus fine aggregation occurs, and thus the edge alignment and slope angle of the patterns are poor.

[0162] In contrast, the edge alignment and slope angle of the photoresist compositions of Examples 1-5 are good, and the mass ratio of MA-100 and MA-8 is in the range of 5-80:20-95, and the synergistic effect is better. In Examples 1-3, the mass ratio of MA-100 and MA-8 is in the range of 10-70:30-90, and the edge alignment and slope angle are the best. It is presumed that the introduction of MA-100 having a high oil absorption value into MA-8 having a low oil absorption value can play a supporting role in the film layer, reduce the flowability of the film layer, effectively improve the edge alignment, and at the same time, optimize the development, so that a black matrix pixel having excellent pixel edge alignment and a good cross-sectional slope angle can be obtained.

[0163] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the same. Although the present application has been described in detail with reference to the above examples, those skilled in the art should understand that the technical solutions described in the above examples can be modified, or some or all of the technical features can be replaced by equivalents. Such modifications or replacements do not change the essence of the corresponding technical solutions, and are within the scope of the technical solutions of the above examples.

[0164] In addition, those skilled in the art will appreciate that although some of the embodiments herein include certain features that are not included in other embodiments, the combination of features of different embodiments means that they are within the scope of the present application and form different embodiments. For example, in the above claims, any one of the claimed embodiments can be used in any combination. The information disclosed in the BACKGROUND section is only intended to deepen the understanding of the overall background of the present application, and should not be considered as acknowledging or implying in any form that the information constitutes prior art known to those skilled in the art.

Claims

1. A pigment dispersion, characterized in that: Includes black colorant; The black colorant includes carbon black A and carbon black B; The oil absorption value of the carbon black A is 80mL / 100g-100mL / 100g; The oil absorption value of the carbon black B is 50mL / 100g-70mL / 100g; The mass ratio of the carbon black A to the carbon black B is 5-80:20-95; The pH of the carbon black A is 2-5; The pH of the carbon black B is 2-5; The raw materials of the pigment dispersion liquid are calculated by mass as 100%, including: Carbon black A 10%-70%, carbon black B 10%-70%, dispersant 5%-65%, first alkali-soluble resin 5%-65%, first organic solvent 10%-70%.

2. The pigment dispersion according to claim 1, wherein The particle sizes of the carbon black A and the carbon black B are independently 20 nm to 60 nm.

3. The pigment dispersion according to claim 2, wherein At least one of the following conditions is met: A. The mass ratio of the carbon black A to the carbon black B is 10-70:30-90; B. the dispersant comprises a carbamate polymer dispersant and / or an acrylic polymer dispersant; C. the first alkali-soluble resin comprises an alkali-soluble Cardo resin and / or an acrylic copolymer resin; D. The first organic solvent includes one or more of ether organic solvents, ether ester organic solvents, ketone organic solvents, alcohol solvents, and nitrogen-containing organic solvents.

4. A photoresist composition, characterized in that The raw materials are calculated as 100% by mass, including: 10%-70% of the pigment dispersion according to any one of claims 1 to 3, 5%-45% of a second alkali-soluble resin, 0.2%-5% of a photopolymerization initiator, 0.2%-50% of a photopolymerizable compound, and 10%-50% of a second organic solvent.

5. The photoresist composition according to claim 4, characterized in that The second alkali-soluble resin includes an alkali-soluble Cardo resin and / or an acrylic copolymer resin.

6. The photoresist composition according to claim 4, wherein The photopolymerization initiator includes 1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]ethanone 1-(O-acetoxime), benzophenone, 4-methoxy-4'-dimethylaminobenzophenone, 2,2-diethoxyacetophenone, benzoin, benzoin methyl ether, benzoin isobutyl ether, benzyl dimethyl ketal, α-hydroxyisobutylbenzophenone, thioxanthone, 2-chlorothioxanthone, 1-hydroxycyclopentyl ketone, 2-hydroxy-3-hydroxy-1-methyl-2-thioxanthone, 1 ... One or more of hexylbenzophenone, tert-butylanthraquinone, 1-chloroanthraquinone, 2,3-dichloroanthraquinone, 3-chloro-2-methylanthraquinone, 2-ethylanthraquinone, 1,4-naphthoquinone, 1,2-benzoquinidone, 1,4-dimethylanthraquinone, 2-phenylanthraquinone, 2-methyl-1[4-(methylthio)phenyl]-2-morpholinopropane-1-one, and 2-methyl-1-(4-methylthiophenyl)-2-morpholino-1-propanone.

7. The photoresist composition according to claim 4, wherein The photopolymerizable compound includes an acrylic compound and / or a methacrylate compound, wherein the acrylic compound and the methacrylate compound each independently contain three or more ethylenically unsaturated groups and satisfy at least one of the following conditions: A. The acrylic compound includes one or more of pentaerythritol triacrylate, pentaerythritol tetraacrylate, sorbitol triacrylate, sorbitol tetraacrylate, sorbitol pentaacrylate, sorbitol hexaacrylate, trimethylolpropane triacrylate, dipentaerythritol pentaacrylate, and dipentaerythritol hexaacrylate; B. The methacrylate compound includes one or more of trimethylolpropane trimethacrylate, trimethylolethane trimethacrylate, pentaerythritol trimethacrylate, pentaerythritol tetramethacrylate, dipentaerythritol hexamethacrylate, sorbitol trimethacrylate, and sorbitol tetramethacrylate.

8. The photoresist composition according to any one of claims 4 to 7, characterized in that: The second organic solvent includes one or more of ether organic solvents, ether ester organic solvents, ketone organic solvents, alcohol solvents, and nitrogen-containing organic solvents.

9. A photosensitive glass, characterized in that: The photoresist composition comprises the photoresist composition according to any one of claims 4 to 8.

10. A liquid crystal display device, characterized in that: Including the photosensitive glass according to claim 9.

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