Colored photosensitive resin composition for partition wall formation, partition wall structure and display device

Abstract

This invention relates to a coloring photosensitive resin composition for forming partition walls, partition wall structures, and display devices. The coloring photosensitive resin composition for forming partition walls is characterized by comprising a colorant, an alkali-soluble resin, a photopolymerization initiator, and a solvent. The colorant comprises one or more compounds selected from the group consisting of perylene compounds and diazo compounds, and a black colorant. The solvent comprises a solvent with a viscosity of 2.0 cP or higher at room temperature. The aforementioned coloring photosensitive resin composition for forming partition walls can readily form partition walls with low specular reflectivity to light sources, thus improving visibility and providing a thicker thickness.

Description

Technical Field

[0001] The present invention relates to a coloring photosensitive resin composition for forming partition walls, partition wall structures manufactured using the same, and a display device comprising the aforementioned partition wall structures. Background Technology

[0002] Coloring photosensitive resin compositions are essential materials in color filters, liquid crystal display materials, organic light-emitting elements, displays, and the like. For example, in the color filters of a color liquid crystal display, a light-blocking layer is formed at the boundary between coloring layers such as red, green, and blue, thereby improving contrast or color rendering.

[0003] Specifically, in pixels composed of red (R), green (G), and blue (B) colors, in order to prevent color mixing with other colors or to hide electrode patterns, partition walls are sometimes formed at the boundary between the color layers of each pixel. In recent years, as various image display devices have increasingly demanded high color purity, high brightness, and high contrast, the importance of partition walls between pixels has also increased.

[0004] Such separators require a relatively thick film to achieve the desired optical density (OD value). However, conventional coloring photosensitive resin compositions for separator formation have the following problems: it is difficult to form a thick film due to the use of low-viscosity solvents, or stains appear on the film surface during the formation of separators through a vacuum drying (VCD) process.

[0005] Furthermore, in order to effectively block incident light, a red colorant is used as a colorant in the photosensitive resin composition for forming the separator, depending on the type of light source. The red colorant used in conventional photosensitive resin compositions for forming separators has the following problems: it cannot effectively block green and blue light, and because the average particle size of the colorant is larger than that of other colorants, the separator formed by the conventional photosensitive resin composition for forming separators has a high refractive index. This results in high reflectivity of light incident from light sources located at lower levels, thereby reducing the visibility of the color filter.

[0006] Korean Patent No. 10-1648607 discloses an ink composition that can improve contrast, but in reality, due to its high reflectivity to light sources, the aforementioned problems have not been fully resolved.

[0007] Therefore, there is a need to develop a coloring photosensitive resin composition for forming partition walls that can easily form partition walls with low specular reflectivity to light sources, improved visibility, and thick thickness.

[0008] Existing technical documents

[0009] Patent documents

[0010] Patent Document 1: Korean Patent Registration No. 10-1648607 Summary of the Invention

[0011] The problem to be solved

[0012] In order to solve the above-mentioned problems of the prior art, the object of the present invention is to provide a coloring photosensitive resin composition for forming a partition wall, which can easily form a partition wall with low specular reflectivity to light source, thereby improving visibility and having a thick thickness.

[0013] Furthermore, the present invention aims to provide a partition wall structure manufactured using the above-described coloring photosensitive resin composition for partition wall formation and a display device comprising the partition wall structure.

[0014] However, the problems that this invention aims to solve are not limited to those mentioned above, and those skilled in the art should be able to clearly understand other problems not mentioned based on the following description.

[0015] Methods for solving problems

[0016] To achieve the above objectives, the present invention provides a coloring photosensitive resin composition for forming a separator wall, characterized in that it comprises a colorant, an alkali-soluble resin, a photopolymerization initiator, and a solvent, wherein the colorant comprises one or more compounds selected from the group consisting of perylene compounds and diazo compounds, and a black colorant, and the solvent comprises a solvent having a viscosity of 2.0 cP or more at room temperature.

[0017] The aforementioned perylene compounds and diazo compounds may be selected from one or more of the group consisting of CI pigment violet 29, CI pigment red 179, CI pigment orange 64 and CI pigment orange 78.

[0018] The aforementioned black colorant can be carbon black.

[0019] The content of the above-mentioned colorant may be 3 to 20% by weight relative to the total weight of the solid components in the coloring photosensitive resin composition for forming the separator.

[0020] The content of the solvent with a viscosity of 2.0 cP or higher at room temperature can be 3 to 25% by weight relative to the total weight of the solvent in the coloring photosensitive resin composition for forming the separator.

[0021] The above-mentioned coloring photosensitive resin composition for forming partition walls may also contain photopolymerizable compounds.

[0022] The above-mentioned coloring photosensitive resin composition for forming separators may also contain one or more additives selected from the group consisting of ink repellents, fillers, adhesion promoters, surfactants and antioxidants.

[0023] The above-mentioned coloring photosensitive resin composition for forming separators can be used to form separators with a thickness of 7 μm or more.

[0024] In addition, the present invention provides a partition wall structure manufactured using the above-described coloring photosensitive resin composition for partition wall formation.

[0025] The specular reflectivity of the aforementioned partition wall structure can be below 4.8.

[0026] In addition, the present invention relates to a display device comprising the above-mentioned partition wall structure.

[0027] Invention Effects

[0028] The present invention provides a coloring photosensitive resin composition for forming a partition wall that can easily form a partition wall with low specular reflectivity to light source, thus improving visibility and having a thick thickness.

[0029] In addition, the present invention can provide a partition wall structure manufactured using the above-described coloring photosensitive resin composition for partition wall formation and a display device comprising the above-described partition wall structure. Attached Figure Description

[0030] Figure 1 This is the surface confirmation result of the acceptable (OK) level in the VD defect evaluation of Experiment Example 4.

[0031] Figure 2 This is the surface confirmation result of the non-conforming (NG) level in the VD defect evaluation of Experiment Example 4. Detailed Implementation

[0032] This invention relates to a coloring photosensitive resin composition for forming partition walls, partition wall structures manufactured using the same, and display devices. The coloring photosensitive resin composition for forming partition walls is characterized by comprising a colorant, an alkali-soluble resin, a photopolymerization initiator, and a solvent. The colorant comprises one or more compounds selected from the group consisting of perylene compounds and diazo compounds, and a black colorant. The solvent comprises a solvent with a viscosity of 2.0 cP or higher at room temperature (RT).

[0033] This invention demonstrates through experiments that by using a colorant comprising one or more compounds selected from the group consisting of perylene compounds and diazo compounds, and a solvent with a viscosity of 2.0 cP or higher at room temperature (RT), a coloring photosensitive resin composition for partition wall formation can be provided, which can easily form partition walls with low specular reflectivity to light sources and high thickness, thereby improving visibility. Specifically, the specular reflectivity of the partition wall structure manufactured using the above-described coloring photosensitive resin composition for partition wall formation can be 4.8 or less.

[0034] The components of the coloring photosensitive resin composition for forming the partition wall according to the present invention will be described in detail below. However, the present invention is not limited to these components.

[0035] In this invention, the total weight of solid components in the coloring photosensitive resin composition for forming separator walls refers to the total weight of all components in the coloring photosensitive resin composition for forming separator walls, excluding the solvent.

[0036] In this invention, the total weight of solvent in the coloring photosensitive resin composition for forming separator walls refers to the total weight of solvent in the coloring photosensitive resin composition for forming separator walls.

[0037] In this invention, the total weight of the colorant in the coloring photosensitive resin composition for forming a partition wall refers to the total weight of the colorant in the coloring photosensitive resin composition for forming a partition wall.

[0038] The terms “comprises” and / or “comprises of” as used in this specification are used in a sense that they do not exclude the presence or addition of one or more other constituent elements besides those mentioned.

[0039] <Colored Photosensitive Resin Composition for Separator Formation>

[0040] The coloring photosensitive resin composition for forming partition walls of the present invention, by comprising specific types of colorants and solvents, can easily form partition walls with low specular reflectivity to light sources, thereby improving visibility and exhibiting a thick thickness. The coloring photosensitive resin composition for forming partition walls of the present invention may further comprise an alkali-soluble resin, a photopolymerization initiator, and / or a photopolymerizable compound.

[0041] Colorant

[0042] The colorant of the present invention is characterized in that it comprises one or more compounds selected from the group consisting of perylene compounds and diazo compounds, as well as a black colorant.

[0043] Select one or more compounds from the group consisting of perylene compounds and diazo compounds.

[0044] The colorant of the present invention may contain one or more compounds selected from the group consisting of perylene compounds and diazo compounds.

[0045] By using one or more compounds selected from the group consisting of perylene compounds and diazo compounds as colorants, the spectral transmittance of the partition wall structure shifts to the longer wavelength band. Compared with the conventional use of red colorants, it can effectively block green and blue light belonging to the wavelength bands of 480 to 600 nm and / or 380 to 550 nm, which is preferred from this perspective.

[0046] From the perspective of reducing reflectivity to the light source by having low refractive properties, and preferably reducing reflectivity to the lower light source to improve the visibility of the display device, the average particle size of the compound selected from the group consisting of perylene compounds and diazo compounds is preferably 30 nm to 50 nm, more preferably 35 to 45 nm, and most preferably 35 to 40 nm. When the average particle size is below 30 nm, dispersion stability is problematic; when the average particle size is above 50 nm, light leakage and diffuse reflection from the lower light source occur, resulting in increased reflectivity.

[0047] When using compounds that do not belong to the group consisting of perylene compounds and diazo compounds as colorants, it is not possible to effectively block light in the green and blue light that belongs to the wavelength bands of 480 to 600 nm and / or 380 to 550 nm. Furthermore, since the average particle size is higher than 50 nm, the reflectivity increases and the visibility of the display device decreases. From this perspective, it is not preferred.

[0048] Examples of the aforementioned perylene compounds include CI Pigment Red 179 and CI Pigment Violet 29, and examples of the aforementioned diazo compounds include CI Pigment Orange 64 and CI Pigment Orange 78, but these are not limited to these examples. These compounds can be used individually or in combination of two or more.

[0049] Black coloring agent

[0050] The colorant of the present invention may contain a black colorant, which, by containing a black colorant, can improve optical density and thus impart light-blocking properties. The black colorant may contain one or more selected from the group consisting of black organic pigments, black-like mixed organic pigments, and black inorganic pigments, preferably a black organic pigment.

[0051] Examples of black organic pigments mentioned above include carbon black, lactam black, perylene black, cyanine black, and aniline black, but they are not limited to these.

[0052] The aforementioned black-like mixed organic pigments may include pigments that are black-like by mixing at least two pigments selected from red, blue, green, purple, yellow, cyan, magenta, etc., but are not limited to this.

[0053] The aforementioned red, blue, green, purple, yellow, cyan, and magenta pigments can be used without limitation, as long as they are pigments commonly used in this field. For example, compounds classified as pigments in the color index can be used, and well-known dyes can also be included.

[0054] Examples of black inorganic pigments mentioned above include chromium oxide, iron oxide, and titanium black.

[0055] In one embodiment of the present invention, considering the high optical density and light-blocking properties, surface smoothness, dispersion stability, and compatibility with resin, the black colorant preferably includes carbon black and / or lactam black, and more preferably includes carbon black.

[0056] In one embodiment of the present invention, carbon black with a resin coating may be used as needed for electrical insulation. The resin-coated carbon black has lower conductivity than uncoated carbon black, and therefore has the advantage of imparting excellent electrical insulation when forming partition wall structures.

[0057] The content of the colorant can be 1 to 30% by weight, preferably 3 to 20% by weight, relative to the total weight of the solid components in the coloring photosensitive resin composition for forming the separator. When the content of the colorant is within the above range, it is advantageous in terms of ensuring sensitivity to exposure and processability, and it can improve the light-blocking properties against red light, thereby improving the visibility of the display device; therefore, it is preferred.

[0058] From the perspective of ensuring minimal reflection, the content of one or more compounds selected from the group consisting of perylene compounds and diazo compounds may be 5 to 20% by weight relative to the total weight of the colorant in the coloring photosensitive resin composition for forming the separator wall, and the content of the black colorant may be 0.1 to 3% by weight relative to the total weight of the colorant in the coloring photosensitive resin composition for forming the separator wall.

[0059] The above colorants may be used with dispersants and / or dispersing aids as needed.

[0060] The dispersant mentioned above can be a suitable cationic, anionic, or nonionic dispersant, but a polymeric dispersant is preferred. Specifically, examples include acrylic copolymers, polyurethanes, polyesters, polyethyleneimine, and polyallylamine. Such dispersants can be commercially available products. Examples include, as acrylic copolymers, DisperBYK-2000, DisperBYK-2001, BYK-LPN6919, BYK-LPN21116 (all manufactured by BYK), and Solsperse 5000 (manufactured by Lubrizol); as polyurethanes, DisperBYK-161, DisperBYK-162, DisperBYK-163, DisperBYK-165, DisperBYK-167, DisperBYK-170, DisperBYK-182 (all manufactured by BYK), and Solsperse 76500 (manufactured by Lubrizol); as polyethyleneimine, Solsperse 24000 (manufactured by Lubrizol); and as polyesters, AJISPUR. PB821, AJISPURPB822, AJISPUR PB880 (manufactured by Ajinomoto Seiko Co., Ltd.), DisperBYK-110 (BYK Corporation), etc.

[0061] The aforementioned dispersing agents can be exemplified by pigment derivatives, specifically copper phthalocyanine, diketopyrrolopyrrole, and sulfonic acid derivatives of quinoline ketone.

[0062] These dispersants can be used individually or in combination of two or more. The content of the dispersant is typically less than 100 parts by weight relative to 100 parts by weight of the colorant, preferably 1 to 70 parts by weight, and more preferably 10 to 50 parts by weight. If the content of the dispersant is too high, the developability may be compromised.

[0063] Alkali-soluble resins

[0064] The alkali-soluble resin of the present invention generally has reactivity and alkali solubility based on the action of light or heat, and serves as a dispersion medium for the above-mentioned colorants.

[0065] The content of the alkali-soluble resin can be 20 to 30% by weight relative to the total weight of the solid components in the coloring photosensitive resin composition for forming the separator wall. If the content of the alkali-soluble resin is within this range, its solubility in the developer is sufficient, making pattern formation easier. This prevents defects such as clogging and damage at the openings caused by the increased formation of inverted cones, and also improves the non-pixel areas' peeling resistance by preventing film reduction in the pixel areas during development. Furthermore, if the content of the alkali-soluble resin is within the above range, curing can be adjusted to occur within a temperature range similar to the curing temperature of other components in the composition, thus providing the advantage of more effectively preventing wrinkles from appearing on the surface of the separator wall structure.

[0066] Photopolymerization initiator

[0067] The photopolymerization initiator of the present invention can be any photopolymerization initiator commonly used in coloring photosensitive resin compositions. For example, acetophenone-based, benzophenone-based, triazine-based, thioxanone-based, oxime-based, benzoin-based, biimidazole-based compounds can be used.

[0068] The acetophenone compounds can be diethoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropane-1-one, benzoyladium dimethyl ketal, 2-hydroxy-1-[4-(2-hydroxyethoxy)phenyl]-2-methylpropane-1-one, 1-hydroxycyclohexylphenyl ketone, 2-methyl-1-(4-methylphenylthio)-2-morpholinopropane-1-one, 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)butane-1-one, oligomers of 2-hydroxy-2-methyl[4-(1-methylvinyl)phenyl]propane-1-one, etc., among which 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)butane-1-one is preferred.

[0069] Benzophenone compounds can include benzophenone, benzoylbenzoate, methyl benzoylbenzoate, 4-phenylbenzophenone, hydroxybenzophenone, acrylated benzophenone, 4,4′-bis(dimethylamino)benzophenone, 4,4′-bis(diethylamino)benzophenone, etc.

[0070] Triazine compounds can be 2,4,6-trichloro-triazine, 2-phenyl-4,6-bis(trichloromethyl)-triazine, 2-(3′,4′-dimethoxystyryl)-4,6-bis(trichloromethyl)-triazine, 2-(4′-methoxynaphthyl)-4,6-bis(trichloromethyl)-triazine, 2-(p-methoxyphenyl)-4,6-bis(trichloromethyl)-triazine, 2-(p-triyl)-4,6-bis(trichloromethyl)-triazine, etc. Triazine, 2-biphenyl-4,6-bis(trichloromethyl)-triazine, bis(trichloromethyl)-6-styryl-triazine, 2-(naphthyl-1-yl)-4,6-bis(trichloromethyl)-triazine, 2-(4-methoxynaphthyl-1-yl)-4,6-bis(trichloromethyl)-triazine, 2,4-trichloromethyl(piperyl)-6-triazine, 2,4-trichloromethyl(4′-methoxystyryl)-6-triazine, etc.

[0071] Thioxanone compounds can include 2-isopropylthioxanone, 2,4-diethylthioxanone, 2,4-dichlorothioxanone, 1-chloro-4-propoxythioxanone, etc.

[0072] Oxime compounds include o-ethoxycarbonyl-α-oxoimino-1-phenylpropane-1-one, and commercially available products are BASF's Irgacure OXE-01, OXE-02 and OXE-03.

[0073] Benzoin compounds can include benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin isobutyl ether, benzoin dimethyl ketal, etc.

[0074] Bimidazole compounds can include 2,2′-bis(2-chlorophenyl)-4,4′,5,5′-tetraphenylbimidazole, 2,2′-bis(2,3-dichlorophenyl)-4,4′,5,5′-tetraphenylbimidazole, 2,2′-bis(2-chlorophenyl)-4,4′,5,5′-tetra(alkoxyphenyl)bimidazole, 2,2′-bis(2-chlorophenyl)-4,4′,5,5′-tetra(trialkoxyphenyl)bimidazole, and bimidazole compounds in which the phenyl group at the 4,4′,5,5′ position is replaced by an alkoxycarbonyl group, etc.

[0075] The content of the photopolymerization initiator can be 1 to 30% by weight, preferably 3 to 20% by weight, relative to the total weight of the solid components in the coloring photosensitive resin composition for separating the barrier. This content range takes into account the photopolymerization rate of the photopolymerizable compound and the physical properties of the final coating film. Below the above range, the polymerization rate is slow and the overall process time may become longer. Above the above range, excessive crosslinking reaction may occur due to excessive reaction, and the physical properties of the coating film may actually decrease. Therefore, it is necessary to appropriately include it within the above range.

[0076] solvent

[0077] The solvent of the present invention can be a solvent with a viscosity of 2.0 cP or higher at room temperature (RT).

[0078] In this invention, the room temperature can be 20 to 25°C, but is not limited thereto.

[0079] The coloring photosensitive resin composition for forming the partition wall of the present invention, by including the solvent having a viscosity of 2.0 cP or more at room temperature, can easily form a partition wall with a thickness of 7 μm or more, and the coloring photosensitive resin composition for forming the partition wall has a suitable vapor pressure, so that even if the partition wall is formed by a vacuum drying (VCD) process, the surface of the partition wall will not peel off, and it has a good surface and can have low reflectivity, which is preferred from this perspective.

[0080] Examples of solvents with a viscosity of 2.0 cP or higher at room temperature include 1,2-propanediol diacetate, diacetone alcohol, dipropylene glycol methyl ether acetate, and ethyl lactate.

[0081] The content of the solvent with a viscosity of 2.0 cP or higher at room temperature can be 1 to 25% by weight relative to the total weight of the solvent in the coloring photosensitive resin composition for forming the partition wall, preferably 3 to 25% by weight, and most preferably 5 to 20% by weight. If the content of the solvent with a viscosity of 2.0 cP or higher at room temperature is lower than the above range, the frequency of partition wall surface peeling during the formation of the partition wall in the VCD process may increase, and it will be difficult to form a thick coating film of 9 μm or more. If it is higher than the above range, it may cause an increase in the time required for the VCD process, resulting in an increase in the time required to produce the display device, or problems such as stains due to contact with the pins of the support glass during the VCD process.

[0082] In addition to the solvents mentioned above that have a viscosity of 2.0 cP or higher at room temperature, other solvents may be added using organic solvents commonly used in the art without particular restriction.

[0083] Specific examples of the solvents mentioned above include: ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether, and other ethylene glycol monoalkyl ethers; diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol dipropyl ether, diethylene glycol dibutyl ether, and other diethylene glycol dialkyl ethers; ethylene glycol alkyl ether acetates such as methyl cellosolve acetate and ethyl cellosolve acetate; propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, and propylene glycol monoethyl ether acetate. Alkylene glycol alkyl ether acetates such as propyl ether acetate, methoxybutyl acetate, and methoxypentyl acetate; aromatic hydrocarbons such as benzene, toluene, xylene, and mesitylene; ketones such as methyl ethyl ketone, acetone, methyl pentyl ketone, methyl isobutyl ketone, and cyclohexanone; alcohols such as ethanol, propanol, butanol, hexanol, cyclohexanol, ethylene glycol, and glycerol; esters such as ethyl 3-ethoxypropionate and methyl 3-methoxypropionate; and cyclic esters such as γ-butyrolactone.

[0084] From the perspective of coatability and drying properties, the solvents mentioned above are preferably organic solvents with a boiling point of 100°C to 200°C. More preferably, alkylene glycol alkyl ether acetates, ketones, ethyl 3-ethoxypropionate, or methyl 3-methoxypropionate, etc., are esters. Even more preferably, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, cyclohexanone, ethyl 3-ethoxypropionate, methyl 3-methoxypropionate, etc., are propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, cyclohexanone, ethyl 3-ethoxypropionate, methyl 3-methoxypropionate, etc. These solvents can be used individually or in combination of two or more.

[0085] The content of the solvent can be 50 to 90% by weight, preferably 60 to 85% by weight, relative to the total weight of the coloring photosensitive resin composition for forming the separator. If the solvent content is within the above range, the coatability can often be improved when coating with coating equipment such as roller coaters, spin coaters, slot coaters, slot coaters (sometimes also called die coaters), and inkjet printers, and is therefore preferred.

[0086] Photopolymers

[0087] The present invention may also include photopolymerizable compounds, which are compounds that can be polymerized by light, such as monofunctional monomers, difunctional monomers, and other polyfunctional monomers.

[0088] The types of monofunctional monomers mentioned above are not particularly limited. Examples include nonylphenyl carbitol acrylate, 2-hydroxy-3-phenoxypropyl acrylate, 2-ethylhexyl carbitol acrylate, 2-hydroxyethyl acrylate, and N-vinylpyrrolidone.

[0089] The types of the aforementioned difunctional monomers are not particularly limited. For example, 1,6-hexanediol di(meth)acrylate, ethylene glycol di(meth)acrylate, neopentyl glycol di(meth)acrylate, triethylene glycol di(meth)acrylate, bis(acryloyloxyethyl) ether of bisphenol A, and 3-methylpentyl glycol di(meth)acrylate are examples.

[0090] The types of the aforementioned multifunctional monomers are not particularly limited. For example, trimethylolpropane tri(meth)acrylate, ethoxylated trimethylolpropane tri(meth)acrylate, propoxylated trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol tri(meth)acrylate, dipentaerythritol penta(meth)acrylate, ethoxylated dipentaerythritol hexa(meth)acrylate, propoxylated dipentaerythritol hexa(meth)acrylate, dipentaerythritol hexa(meth)acrylate, etc.

[0091] Examples of commercially available photopolymerizable compounds include Kayarad DPHA from Nippon Kayaku Co., Ltd., but are not limited to these.

[0092] The content of the above-mentioned photopolymerizable compound can be 5 to 70% by weight relative to the total weight of the solid components in the coloring photosensitive resin composition for forming the separator wall, preferably 10 to 60% by weight. If the content is within the above range, it has ideal advantages in terms of the strength or smoothness of the pixel portion.

[0093] additive

[0094] In addition to the above-mentioned components, the present invention may also include additives as needed by those skilled in the art without prejudice to the purpose of the present invention. Examples of additives include ink repellents, fillers, adhesion promoters, surfactants, antioxidants, etc., but are not limited thereto.

[0095] The aforementioned ink repellents are components that impart ink-repellent properties to the surface of the cured film. Examples include partially hydrolyzed condensates of hydrolyzable silane compounds. Hydrolyzable silane compounds can be used alone or in combination with two or more. Additionally, ink repellents containing fluorine atoms or compounds composed of hydrocarbon main chains with fluorine atoms in their side chains can be used. Commercially available examples include RS-72-A from DIC Corporation.

[0096] Examples of fillers mentioned above include glass, silica, and alumina.

[0097] The aforementioned adhesion promoter can be added to improve adhesion to the substrate and may include, but is not limited to, a silane coupling agent having a reactive substituent selected from the group consisting of carboxyl, methacryloyl, isocyanate, epoxy, and combinations thereof. Examples of such silane coupling agents include trimethoxysilylbenzoic acid, vinyltriacetoxysilane, vinyltrimethoxysilane, γ-isocyanatepropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, and 3-methacryloyloxypropyltrimethoxysilane, which can be used alone or in combination of two or more.

[0098] The surfactants described above can be used to further improve the coatability of the coloring photosensitive resin composition for forming the separator walls. Fluoropolymer surfactants such as BM-1000, BM-1100 (BM Chemie), Fluorad FC-135 / FC-170C / FC-430 (Sumitomo 3M Co., Ltd.), and SH-28PA / -190 / SZ-6032 (Toray Silicones Co., Ltd.) can be used, but are not limited to these. The surfactants described above can also be used as pigment dispersants; in this case, polyester surfactants can be used.

[0099] The aforementioned antioxidants may include one or more selected from the group consisting of phenolic antioxidants, phosphorus antioxidants, and sulfur antioxidants. In this case, it is possible to suppress discoloration that may occur at high temperatures during the process or yellowing that may occur due to light sources after the display is manufactured. Commercially available examples of the aforementioned antioxidants include Irganox 1010 (manufactured by BASF), Sumilizer BBM-S (manufactured by Sumitomo Chemical), ADK STAB AO-80 (manufactured by ADEKA), Sumilizer GP (manufactured by Sumitomo Chemical), and Irganox 1035 (manufactured by BASF).

[0100] The above-mentioned additives may be used by those skilled in the art without impairing the effects of the present invention. The above-mentioned additives may be used at 0.05 to 10% by weight, preferably 0.1 to 10% by weight, and more preferably 0.1 to 5% by weight, relative to the total weight of the solid components in the coloring photosensitive resin composition for forming the partition wall, but are not limited thereto.

[0101] <Separation Wall Structure>

[0102] The present invention provides a partition wall structure manufactured using the above-described coloring photosensitive resin composition for partition wall formation. In order to provide the partition wall structure of the present invention, in addition to including the above-described coloring photosensitive resin composition for partition wall formation, the composition and manufacturing method commonly used in the same field for manufacturing partition walls can be used.

[0103] The specular reflectivity of the aforementioned partition wall structure can be 4.8 or less, preferably 4.7 or less. This is preferable from the perspective that a specular reflectivity within the aforementioned range results in low reflectivity to light sources, thereby improving visibility.

[0104] The aforementioned partition wall structure can be applied to panels.

[0105] <Display Device>

[0106] In addition, the present invention provides a display device comprising a partition structure manufactured using the above-described coloring photosensitive resin composition for partition formation.

[0107] The above-described display device is not particularly limited, but from the perspective that the partition wall structure made of the partition wall forming coloring photosensitive resin composition of the present invention has a high absorption rate of blue and / or green light, it is preferred for use in a display device that uses a blue and / or green backlight unit as a light source.

[0108] The present invention will now be described in more detail through examples.

[0109] However, the following embodiments are intended to describe the present invention in more detail, and the scope of the present invention is not limited to the following embodiments. Those skilled in the art can make appropriate modifications and changes to the following embodiments within the scope of the present invention.

[0110] In addition, the following terms “%” and “parts” for content are by weight unless otherwise specified.

[0111] <Example>

[0112] Manufacturing Example 1: Manufacturing of Pigment Dispersion (A-1)

[0113] 20 parts by weight of CI pigment red 179, 5 parts by weight of BYKLPN-6919 (BYK Corporation) as a pigment dispersant, 75 parts by weight of propylene glycol monomethyl ether acetate, and 11.25 parts by weight of 1,2-propanediol diacetate were mixed and then dispersed using a bead mill to produce pigment dispersion A-1.

[0114] Manufacturing Example 2: Manufacturing of Pigment Dispersion (A-2)

[0115] 20 parts by weight of CI pigment orange 64, 5 parts by weight of BYKLPN-6919 (BYK Corporation) as pigment dispersant, 75 parts by weight of propylene glycol monomethyl ether acetate, and 11.25 parts by weight of 1,2-propanediol diacetate were mixed and then dispersed using a bead mill to produce pigment dispersion A-2.

[0116] Manufacturing Example 3: Manufacturing of Pigment Dispersion (A-3)

[0117] 20 parts by weight of CI pigment Violet 29, 5 parts by weight of BYKLPN-6919 (BYK Corporation) as pigment dispersant, 75 parts by weight of propylene glycol monomethyl ether acetate, and 11.25 parts by weight of 1,2-propanediol diacetate were mixed and then dispersed using a bead mill to produce pigment dispersion A-3.

[0118] Manufacturing Example 4: Manufacturing of Pigment Dispersion (A-4)

[0119] 20 parts by weight of CI pigment red 254, 5 parts by weight of BYKLPN-6919 (BYK Corporation) as a pigment dispersant, 75 parts by weight of propylene glycol monomethyl ether acetate, and 11.25 parts by weight of 1,2-propanediol diacetate were mixed and then dispersed using a bead mill to produce pigment dispersion A-4.

[0120] Manufacturing Example 5: Manufacturing of Pigment Dispersion (A-5)

[0121] 20 parts by weight of CI pigment red 177, 5 parts by weight of BYKLPN-6919 (BYK Corporation) as a pigment dispersant, 75 parts by weight of propylene glycol monomethyl ether acetate, and 11.25 parts by weight of 1,2-propanediol diacetate were mixed and then dispersed using a bead mill to produce pigment dispersion A-5.

[0122] Manufacturing Example 6: Manufacturing of Pigment Dispersion (A-6)

[0123] Pigment dispersion A-6 was prepared by mixing 20 parts by weight of carbon black, 5 parts by weight of BYKLPN-6919 (BYK Corporation) as a pigment dispersant, 75 parts by weight of propylene glycol monomethyl ether acetate, and 11.25 parts by weight of 1,2-propanediol diacetate, and then mixing and dispersing the mixture using a bead mill.

[0124] Examples 1 to 8 and Comparative Examples 1 to 5: Preparation of Colored Photosensitive Resin Compositions for Partition Formation

[0125] Colored photosensitive resin compositions for partition wall formation of Examples 1 to 8 and Comparative Examples 1 to 5 were manufactured according to the composition and content in Table 1 below.

[0126] [Table 1]

[0127]

[0128] - A-1~6: Manufacturing pigment dispersions of Examples 1~6

[0129] - B: CX-65-C (Lysenkor Corporation)

[0130] - C: A9550 (Nippon Kayaku Co., Ltd.)

[0131] - D: PBG-327 (Tronly Company)

[0132] - E: Surfactant F-554 (DIC Company)

[0133] - F-1: Propylene glycol monomethyl ether acetate (PGMEA, viscosity at 25°C is 1.13 cP)

[0134] - F-2: 1,2-Propanediol diacetate (PGDA, viscosity at 25°C is 2.63 cP)

[0135] - F-3: Diacetone alcohol (DAA, viscosity at 25°C is 3.08 cP)

[0136] - F-4: Dipropylene glycol methyl ether acetate (DPMA, viscosity at 25°C is 2.26 cP)

[0137] - F-5: Ethyl 3-ethoxypropionate (EEP, viscosity at 25°C is 1.23 cP)

[0138] - F-6: Propylene glycol monomethyl ether (PGME, viscosity at 25°C is 1.76 cP)

[0139] Experimental Example

[0140] (1) Manufacturing of partition wall structures

[0141] A 5cm × 5cm glass substrate (Corning Corporation) was cleaned with neutral detergent and water and then dried. The coloring photosensitive resin composition for partition wall formation prepared in the above examples and comparative examples was spin-coated onto the glass substrate to a final film thickness of 9.0 μm, and pre-baked at 100°C for 3 minutes to remove solvent. Then, an exposure of 80~120 mJ / cm was applied. 2 Exposure forms a coating with a pattern of 1 cm × 3 cm, and the unexposed areas are removed using an alkaline aqueous solution. Then, it is post-baked at 230°C for 30 minutes, thereby creating the partition wall structure.

[0142] (2) Evaluation of specular reflectivity

[0143] The reflectance of the color filter containing the partition wall structure manufactured above was measured using a spectrometer (SPECTROMETER CM-3700D, Konica Minolta). The specular reflectance was calculated according to the following formula 1, and the results are shown in Table 2 below.

[0144] [Formula 1]

[0145] Specular reflectivity = Total reflectance (SCI) - Diffuse reflectance (SCE)

[0146] (3) Viscosity evaluation

[0147] For the coloring photosensitive resin compositions for partition wall formation manufactured from the examples and comparative examples, the viscosity was measured at 25°C using Viscomate V150 III (TOKI Sangyo Co., Ltd.), and the results are shown in Table 2 below.

[0148] (4) Evaluation of film thickness

[0149] For the partition wall structure manufactured above, the membrane thickness was measured using a Detak XT (Bruker) membrane thickness meter, and the results are shown in Table 2 below.

[0150] (5) Evaluation of defects in vacuum drying (VD)

[0151] The coloring photosensitive resin composition for partition wall formation prepared by the examples and comparative examples was applied at 180 rpm, then solvent-dried in a vacuum drying apparatus with a fixed blank tact time of 65 Pa and 17 sec, and the surface was examined using a microscope. The following steps were followed. Figure 1 and Figure 2 The criteria for judging VD defects as non-compliant (NG) or compliant (OK) are shown in Table 2 below.

[0152] [Table 2]

[0153]

[0154] Referring to Table 2 above, it can be confirmed that the coloring photosensitive resin composition for forming the partition wall in Examples 1 to 8 of this application has a viscosity of 6.1 or higher, so it is not only easy to form a partition wall with a thickness of 9 μm or more, but the partition wall structure manufactured using it also has a low reflectivity with a specular reflectivity of 4.66 or less. The VD defect results also confirm that the partition wall surface does not peel off and has a good surface.

[0155] On the other hand, it can be confirmed that the specular reflectance of Comparative Examples 1 to 2, which use colorants that are not perylene compounds or diazo compounds, is 4.88 or higher, which is higher than that of the Examples and thus reduces visibility. The viscosity of Comparative Examples 3 to 5, which do not contain solvents with a viscosity of 2.0 cP or higher or deviate from the content range, does not reach 6, making it difficult to form a partition wall with a thickness of 9 μm. The VD defect results also confirm that the partition wall surface peels off, resulting in stains on the surface.

Claims

1. A coloring photosensitive resin composition for forming partition walls, characterized in that, It contains colorants, alkali-soluble resins, photopolymerization initiators, and solvents. The colorant comprises one or more compounds selected from the group consisting of perylene compounds and diazo compounds, as well as a black colorant. The solvent is a solvent with a viscosity of 2.0 cP or higher at room temperature.

2. The coloring photosensitive resin composition for forming partition walls according to claim 1, wherein the perylene compound and the diazo compound are selected from one or more of the group consisting of CI pigment violet 29, CI pigment red 179, CI pigment orange 64 and CI pigment orange 78.

3. The coloring photosensitive resin composition for forming a partition wall according to claim 1 or 2, wherein the black colorant is carbon black.

4. The coloring photosensitive resin composition for forming a partition wall according to claim 1 or 2, wherein the content of the colorant is 3 to 20% by weight relative to the total weight of the solid components in the coloring photosensitive resin composition for forming a partition wall.

5. The coloring photosensitive resin composition for forming a separator wall according to claim 1 or 2, wherein the content of the solvent having a viscosity of 2.0 cP or more at room temperature is 3 to 25 by weight relative to the total weight of the solvent in the coloring photosensitive resin composition for forming a separator wall.

6. The coloring photosensitive resin composition for forming a partition wall according to claim 1 or 2, wherein the coloring photosensitive resin composition for forming a partition wall further comprises a photopolymerizable compound.

7. The coloring photosensitive resin composition for forming separator walls according to claim 1 or 2, wherein the coloring photosensitive resin composition for forming separator walls further comprises one or more additives selected from the group consisting of ink repellents, fillers, adhesion promoters, surfactants and antioxidants.

8. The coloring photosensitive resin composition for forming a partition wall according to claim 1 or 2, wherein the coloring photosensitive resin composition for forming a partition wall is used to form a partition wall with a thickness of 7 μm or more.

9. A partition wall structure manufactured using any one of the partition wall forming coloring photosensitive resin compositions according to claims 1 to 8.

10. The partition wall structure according to claim 9, wherein the specular reflectance of the partition wall structure is 4.8 or less.

11. A display device comprising the partition wall structure of claim 9.

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