JPH0949902A - Overcoating material of color filter for liquid crystal display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an overcoating material capable of forming an overcoating layer having satisfactory flatness and resistance to heat, solvents, moisture and chemicals and excellent in adhesion to a transparent substrate and a color filter by incorporating a polyester-modified silicone resin having a specified solid content of the silicone resin part as a coating film forming component. SOLUTION: This overcoating material uses polyester modified silicone resin having 20-95wt.% solid content of the silicone resin part as a coating film forming component. In the case of <20wt.% in the content, heat resistance deteriorates an a formed overcoating layer 6 is liable to yellow. In the case of >95wt.%, the hardness of a coating film increases but the film becomes liable to crack by heating. The solid content of the silicone resin part is preferably regulated to about 30-80wt.%.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a color filter overcoat material used in a liquid crystal display device.

[0002]

2. Description of the Related Art Liquid crystal display devices are capable of low voltage driving, low power driving, color display, large size, etc.
Liquid crystal color display devices for color display and large-scale display have been developed and put into practical use. In such a liquid crystal display device, it is required that a fine pattern of transparent electrodes having a pitch of about several tens of microns can be formed, a high pixel density can be obtained, and high reliability is required. .

Generally, in a liquid crystal color display device, an electrode plate having a transparent electrode formed on a color filter is known to be excellent in driving speed of liquid crystal, display quality and the like. An organic resin film overcoat layer is provided between the color filter and the transparent electrode.

Such an overcoat layer is provided for the purpose of flattening the color filter, protecting the color filter, and the like, and it goes without saying that the overcoat material has good adhesion to the color filter. ,
Adhesion to the transparent electrode is also good, and further, it is required to have excellent heat resistance, solvent resistance, acid resistance, alkali resistance and the like. As a conventional overcoat material, a resin similar to the material of the color filter is used from the viewpoint of adhesion to the color filter, but the organic resin such as acrylic resin used for the color filter has heat resistance. However, there is a drawback that wrinkles, swelling, etc. occur during the formation of the transparent electrode. In addition, there is a problem that when the transparent electrode is formed, it is partially decomposed to contaminate the inside of the device for forming the transparent electrode with an organic substance.

Although a silicone-modified acrylic resin has been proposed as an overcoat material for improving these drawbacks (Japanese Patent Laid-Open No. 63-218771), its heat resistance is still insufficient, and boiling water resistance and solvent resistance are still insufficient. The sex is not satisfactory either.

Further, a silicone type hard coat material by the sol-gel method has been proposed (Japanese Patent Laid-Open No. 62-5690).
No. 2), heat resistance, solvent resistance, etc. have been improved,
The flatness is insufficient and the distance between the electrodes becomes uneven,
The liquid crystal response is not constant and the image quality is poor. In addition, the treatment liquid is unstable, which poses a practical problem.

[0007]

The main object of the present invention is to:
It is possible to form an overcoat layer having excellent flatness, heat resistance, solvent resistance, moisture resistance, chemical resistance, etc. and excellent adhesion to a transparent substrate or a color filter, and further, on the overcoat layer. Another object of the present invention is to provide a color filter overcoat material capable of forming a transparent electrode having excellent properties.

[0008]

DISCLOSURE OF THE INVENTION The present inventor has conducted extensive studies in view of the above-mentioned conventional techniques, and as a result, according to a color filter overcoat material containing a specific polyester-modified silicone resin as a film-forming component, It is possible to achieve the above-mentioned objects, and particularly when using a polyester-modified silicone resin in which many methyl groups are bonded to silicon atoms in the silicone resin portion, the hardness, flatness, moisture resistance and the like of the cured film are improved. It was found that the transparent electrode has a low resistance and the reliability and the like are improved, and the present invention has been completed here.

That is, the present invention relates to a color filter overcoat material containing a polyester-modified silicone resin having a solid content in the silicone resin portion of 20 to 95% by weight as a film-forming component.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION In the color filter overcoat material for a liquid crystal display of the present invention, a polyester-modified silicone resin having a silicone resin portion having a solid content of 20 to 95% by weight is used as a film-forming component. If the proportion of the silicone resin portion is below this range, the heat resistance will be low, and the overcoat layer will be easily yellowed, while if the proportion of the silicone resin portion is too large, the film hardness will be high. However, it is not preferable because cracks are easily generated by heating. The solid content ratio of the silicone resin portion in the polyester-modified silicone resin is preferably about 30 to 80% by weight. In the present invention, the solid content ratio of the silicone resin portion in the polyester-modified silicone resin is the ratio of the solid content of the silicone resin component to the total solid content of both the silicone resin component and the polyester resin component used as raw materials. When an organosilicon compound is used as the raw material for the silicone resin component, the value calculated from the amount of the organosilicon compound as the raw material is the theoretical amount of the silicone resin component formed by hydrolysis and condensation of the organosilicon compound. The solid content of the resin component.

As the polyester-modified silicone resin, those having a number average molecular weight of about 300 to 50,000 are suitable, and those having a number average molecular weight of about 500 to 10,000 are preferable.

Further, a silicon atom of the silicone resin portion is usually bonded with a hydrocarbon group having about 1 to 10 carbon atoms such as methyl, ethyl, propyl and phenyl groups.
In the present invention, a methyl group, a phenyl group or the like is industrially preferable as the hydrocarbon group directly bonded to the silicon atom. or,
Among the hydrocarbon groups directly bonded to the silicon atom of the silicone resin part, when the amount of methyl groups is large, the hardness, flatness, moisture resistance, etc. of the cured film are improved and the transparent electrode has a low resistance. An effect such as improvement in reliability can also be obtained.
Therefore, of the hydrocarbon groups directly bonded to the silicon atoms of the silicone resin portion, the amount of methyl groups is preferably 40 mol% or more, more preferably 70 mol% or more. On the other hand, when the amount of the methyl group bonded to the silicon atom is too small, the flatness of the cured film becomes poor and wrinkles and swelling are likely to occur when the transparent electrode is formed, which is not preferable. In the present invention, when a polyester-modified silicone resin in which all of the hydrocarbon groups directly bonded to silicon atoms of the silicone resin portion are methyl groups is used, a film excellent in flatness and water resistance is formed. It is suitable.

The polyester-modified silicone resin used in the present invention can be obtained by a conventional method. For example, a method of hydrolyzing / condensing an organosilicon compound such as chlorosilane or alkoxysilane in the presence of polyester resin, polyester resin and silicone The resin can be produced by a method such as dehydration or dealcoholization condensation reaction using a metal catalyst such as titanium.

Since a silicone resin having a large number of methyl groups bonded to silicon atoms has poor compatibility with a polyester resin, when such a silicone resin is used, it is produced by a method of condensing the polyester resin and the silicone resin. Then, the reaction is difficult to proceed and it is difficult to obtain a transparent solution. Therefore, in order to obtain a polyester-modified silicone resin in which a large number of methyl groups are bonded to silicon atoms in the silicone resin portion, it is preferable to produce it by a method of hydrolyzing / condensing an organosilicon compound in the presence of the polyester resin.

As the polyester resin used in these production methods, one having at least two hydroxyl groups in one molecule is used. Such a polyester resin can be produced by an esterification reaction between a saturated polybasic acid and a polyhydric alcohol according to a conventional method. Examples of the saturated polybasic acid used in this reaction include isophthalic acid, terephthalic acid, phthalic anhydride, tetrahydrophthalic anhydride, adipic acid, trimellitic anhydride, and the like. These may be used alone or in combination of two or more. Can be used. Also, as polyhydric alcohols,
Ethylene glycol, diethylene glycol, propylene glycol, glycerin, neopentyl glycol,
Examples thereof include trimethylolethane and trimethylolpropane, and these can be used alone or in combination of two or more kinds.

As described above, a silicone resin having a large number of methyl groups bonded to silicon atoms has low compatibility with a polyester resin. Therefore, when a silicone resin having a large number of methyl groups is used, the polyester resin As a raw material for the above, it is preferable to select a compound capable of forming a polyester resin that easily reacts with the silicone resin, within a range that does not impair the heat resistance.

Alkoxysilanes used in the hydrolysis / condensation reaction of the above polyester resin and organosilicon compound include methyltrimethoxysilane, methyltriethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, dimethyldimethoxysilane and dimethyl. Examples thereof include diethoxysilane, diphenyldimethoxysilane, and partially hydrolyzed condensates thereof.

As the silicone resin used in the method of obtaining a polyester-modified silicone resin by reacting a polyester resin and a silicone resin, a commonly used modifying silicone resin having a functional group such as a hydroxyl group or an alkoxyl group is used. Those having a functional group equivalent of about 100 to 1,000 can be preferably used. Specific examples of such a modifying silicone resin include TSR-1
60, TSR-165 (manufactured by Toshiba Silicone Co., Ltd.), KR-
211, KR-212 (manufactured by Shin-Etsu Chemical Co., Ltd.) and the like, and commercially available silicone resins can be mentioned.

Specific preferred examples of the polyester-modified silicone resin used in the present invention include XR-32-A57.
75, XR-32-A1612 (manufactured by Toshiba Silicone Co., Ltd.), KR-5221, KR-5235 (manufactured by Shin-Etsu Chemical Co., Ltd.) and the like can be used.

The overcoat material of the present invention contains the above polyester-modified silicone resin as a film-forming component, and is usually used by adding a solvent thereto to adjust the viscosity to an appropriate level. The amount of solvent used is usually
It may be about 20 to 2000 parts by weight, preferably about 50 to 200 parts by weight, relative to 100 parts by weight of the resin solid content. The type of solvent is not particularly limited, for example, cellosolve-based solvent, propylene glycol-based solvent, carbitol-based solvent, hydrocarbon-based solvent, alcohol-based solvent, ester-based solvent, ketone-based solvent and the like are used. It is also possible to mix these and use them.

The overcoat material of the present invention also comprises
In order to improve the adhesion to the color filter,
If necessary, a silane coupling agent can be added as an adhesion improver. Specific examples of the silane coupling agent include γ-glycidoxypropyltrimethoxysilane, β- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, γ-acryloxypropyltrimethoxysilane. Methoxysilane, N-β (aminoethyl) γ-aminopropyltrimethoxysilane, N-β (aminoethyl) γ-
Examples thereof include aminopropylmethyldimethoxysilane, γ-aminopropyltriethoxysilane, N-phenyl-γ-aminopropyltrimethoxysilane, γ-mercaptopropyltrimethoxysilane and γ-chloropropyltrimethoxysilane. The compounding amount of the silane coupling agent is preferably about 0.005 to 10 parts by weight, and 0.1 to 5 parts by weight, based on 100 parts by weight of the resin solid content in order to exert the effect of improving the adhesiveness. It is more preferable that the amount is about parts by weight.

Further, the overcoat material of the present invention comprises
If necessary, a curing catalyst can be added to accelerate the curing reaction. Such curing catalysts include metal salts such as naphthenic acid and octylic acid (Al salt, Ca salt, C
o salt, Fe salt, Mg salt, Mn salt, Pb salt, Zn salt, Zr
Salt, Sn salt, Ni salt, etc.), organotin compounds such as dibutyltin acetate, dibutyltin octate, aluminum dibutoxide monoethylacetoacetate, aluminum dibutoxide monomethylacetoacetate, aluminum dipropoxide monoethylacetoacetate, aluminum trisethylacetate Metal chelate compounds such as acetate and aluminum trisacetylacetonate,
Tetrapropyl titanate, tetrabutyl titanate,
Metal alkoxides such as tetrapropylzirconium and tetrabutylzirconium, bases such as amine compounds, acids such as hydrochloric acid, sulfuric acid and phosphoric acid can be used. The compounding amount of the curing catalyst is 0.01 to 5 relative to 100 parts by weight of the resin solid content in order to exert a sufficient curing acceleration effect.
The amount is preferably about parts by weight, and more preferably about 0.1 to 3 parts by weight.

The overcoat material of the present invention further comprises
If necessary, in order to further improve various properties of the formed overcoat layer, for example, heat resistance, chemical resistance, solvent resistance, moisture resistance, scratch resistance, etc., a crosslinking agent can be added. . The cross-linking agent can be used without particular limitation as long as it is a component capable of functioning as a cross-linking agent for the polyester-modified silicone resin described above, but as a preferable cross-linking agent,
Examples thereof include acetic acid type, oxime type, alcohol type, amide type, and acetone type crosslinking agents represented by the following general formula.

[0024]

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[0025]

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In order to sufficiently improve the properties of the overcoat layer as described above, the amount of the crosslinking agent is preferably about 5 to 1000 parts by weight with respect to 100 parts by weight of the resin solid content, More preferably, it is about 10 to 500 parts by weight.

A schematic sectional view of an example of an electrode plate obtained by using the overcoat material of the present invention is shown in FIG.

The overcoat material of the present invention is applied and cured on a transparent substrate 1 having a color filter composed of a black matrix 2, a blue pattern 3, a green pattern 4 and a red pattern 5 according to a conventional method and cured. The overcoat layer 6 can be formed.

As the transparent substrate, those normally used in liquid crystal display devices can be used. For example, float glass or quartz glass having a thickness of about 0.5 to 5 mm is used.

As the resin composition used for the color filter, commonly used materials such as gelatin, casein, epoxy resin and acrylic resin can be used. The color filter is not particularly limited, but can be formed by photolithography, a printing method, or the like. The black matrix 2 can be formed by a known method, and examples thereof include a method of forming a black color filter material and a method of etching a metal film formed by sputtering chromium or the like. .

The method of applying the overcoat material is not particularly limited, but for example, a spin coater method, a roll coater method or the like can be used. The overcoat layer 6 may have a thickness of usually about 200 to 50,000 angstroms after drying, preferably 50.
It is set to about 00 to 30000 angstroms. When the overcoat layer is too thin, the function as a protective film is not sufficient, while when it is too thick, it is easy to absorb light having a short wavelength and easily colored, which is not preferable.

The method of curing the overcoat material of the present invention is not particularly limited as long as it can be heated to a necessary curing temperature, and examples thereof include a hot air drying oven, an infrared drying oven, a hot plate and the like. It can be used and cured. The curing temperature is usually about 100 to 300 ° C, preferably about 150 to 250 ° C. If the curing temperature is lower than 100 ° C., the curing tends to be insufficient, and in the case where there is a washing step with isopropyl alcohol in the subsequent step, peeling may occur between the color filter and the overcoat, which is not preferable. Also, the curing temperature is 3
If the temperature exceeds 00 ° C, the underlying color filter layer is likely to discolor, which is not preferable. Curing time is usually 30 to 1
It may be about 20 minutes.

The overcoat layer 6 thus formed
A transparent electrode 7 for operating the liquid crystal is formed on the upper surface of the electrode. The type and forming method of the transparent electrode 7 are not particularly limited, and an ITO film or the like is generally used.

[0034]

According to the color filter overcoat material of the present invention, flatness, heat resistance, solvent resistance, moisture resistance,
It is possible to form an overcoat layer having good chemical resistance and the like and excellent adhesion to a transparent substrate or a color filter, and it is possible to form a transparent electrode having good characteristics on the overcoat layer. Therefore, by using the color filter overcoat material of the present invention, at a high pixel density,
It becomes possible to manufacture a liquid crystal display device having high reliability.

[0035]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples. In the following examples, "part" means "part by weight". The viscosity is a measured value at 25 ° C.

Example 1 A partial hydrolyzate of CH ₃ Si (OCH ₃ ) ₃ (average dimer) and C ₆ were added to a butyl carbitol acetate solution of a polyester resin containing terephthalic acid and trimethylolethane as monomer components. A partial hydrolyzate (average dimer) of H ₅ Si (OCH ₃ ) ₃ was blended in a molar ratio of the former: the latter of 9: 1, and these components and the above polyester resin were hydrolyzed and condensed, Silicone resin portion / polyester resin portion (solid content ratio) = 6/4, number average molecular weight 17
At 00, a polyester-modified silicone resin having a resin solid content of 60% by weight (90 mol% of hydrocarbon groups directly bonded to silicon atoms in the silicone resin portion is a methyl group) was obtained.

This polyester-modified silicone resin 10
To 0 parts, add 100 parts of butyl carbitol,
A color filter overcoat material was obtained by filtering with a commercially available 0.5 μm membrane filter. This was applied to 1.1 mm thick soda lime glass by spin coating so as to have a dry film thickness of 2 μm, and cured in a clean oven at 200 ° C. for 60 minutes to form an overcoat layer. The following tests were carried out using this. The results are shown in Table 1 below.

* Test method Adhesion test: In accordance with JIS-K-5400. The number of remaining coating films after the removal of cellophane tape is shown.

Hardness: According to JIS-K-5400.

Acid resistance test 1: According to JIS-K-5400. The film was immersed in a 10% aqueous hydrochloric acid solution at 25 ° C for 30 minutes, and the appearance and adhesion of the coating film were observed. Adhesion was evaluated in the same manner as in the above adhesion test. The appearance was evaluated according to the following criteria.

∘: No abnormality ○: Swelling and peeling slightly Δ: Swelling and peeling ×: Swelling and peeling all over Acid resistance test 2: In accordance with JIS-K-5400. 25 ° C
It was immersed in 10% sulfuric acid aqueous solution for 30 minutes, and the appearance and adhesion of the coating film were observed. The evaluation method was the same as in the acid resistance test 1.

Alkali resistance test 1: JIS-K-540
According to 0. The film was immersed in a 10% aqueous sodium hydroxide solution at 25 ° C for 30 minutes, and the appearance and adhesion of the coating film were observed. The evaluation method was the same as in the acid resistance test 1.

Alkali resistance test 2: Same as the alkali resistance test 1, except that the temperature of the 10% aqueous sodium hydroxide solution was 50 ° C.

Boiling water resistance test: According to JIS-K-5400. It was immersed in boiling water for 10 hours, and the appearance and adhesion of the coating film were observed. The evaluation method was the same as in the acid resistance test 1.

Moisture resistance test: After leaving it in a thermo-hygrostat at 50 ° C. and a humidity of 90% for 168 hours, the appearance and adhesion of the coating film were observed. The evaluation method was the same as in the acid resistance test 1.

PCT resistance: 121 ° C., humidity 96%, 2
After being left under atmospheric pressure for 10 hours, the appearance and adhesion of the coating film were evaluated in the same manner as in acid resistance test 1.

Solvent resistance test: In accordance with JIS-K-5400. 25 ° C methanol, isopropyl alcohol (IPA) or N-methyl-2-pyrrolidone (NMP)
It was dipped in the solution for 30 minutes and the appearance and adhesion of the coating film were observed.
The evaluation method was the same as in the acid resistance test 1.

Heat resistance test: The film was left in a clean oven at 250 ° C. for 2 hours, and the appearance and adhesion of the coating film were evaluated in the same manner as in acid resistance test 1.

Thermal loss: 250 by thermal analyzer (TG)
The loss on heat after holding for 1 hour at ℃ was measured.

Flatness: A commercially available photosensitive colorant is used as a base, and a line and space of 100 μm is formed.
An overcoat layer was provided, and its flatness was measured with a contact type surface roughness meter.

ITO characteristics: An ITO film layer of 2000 angstrom was formed on the overcoat layer by sputtering, the appearance of the coating film thereafter was visually evaluated, and the resistance value of the ITO film was measured.

Example 2 The ratio of the silicone resin portion to the polyester resin portion in the polyester-modified silicone resin was calculated as follows: Silicone resin portion / Polyester resin portion (solid content ratio) = 4/6
In the same manner as in Example 1 except that the number average molecular weight was 1700, a polyester-modified silicone resin (90 mol% of the hydrocarbon groups directly bonded to silicon atoms in the silicone resin portion was a methyl group) was produced. Using this, an overcoat layer was formed in the same manner as in Example 1, and each test was performed. The results are shown in Table 1 below.

Example 3 The partial hydrolyzate of CH ₃ Si (OCH ₃ ) ₃ (average dimer) used in Example 1 and the partial hydrolyzate of C ₆ H ₅ Si (OCH ₃ ) ₃ (average) The dimer) is the former: latter molar ratio of 7: 3.
Polyester-modified silicone resin (70 mol% of the hydrocarbon groups directly bonded to silicon atoms in the silicone resin portion are methyl groups) in the same manner as in Example 1, except that
Was manufactured. The obtained polyester-modified silicone resin had a silicone resin portion / polyester resin portion (solid content ratio) = 6/4, a number average molecular weight of 1900, and a resin solid content of 60% by weight. Using this, an overcoat layer was formed in the same manner as in Example 1, and each test was performed. The results are shown in Table 1 below.

Example 4 The partial hydrolyzate of CH ₃ Si (OCH ₃ ) ₃ used in Example 1 (average dimer) and the partial hydrolyzate of C ₆ H ₅ Si (OCH ₃ ) ₃ (average) Dimer) is the former: latter molar ratio 5: 5
Polyester-modified silicone resin (50 mol% of the hydrocarbon groups directly bonded to the silicon atom of the silicone resin portion is a methyl group) in the same manner as in Example 1 except that
Was manufactured. The obtained polyester-modified silicone resin had a silicone resin portion / polyester resin portion (solid content ratio) = 6/4, a number average molecular weight of 2000, and a resin solid content of 60% by weight. Using this, an overcoat layer was formed in the same manner as in Example 1, and each test was performed. The results are shown in Table 1 below.

Example 5 To the overcoat material obtained in Example 1, 1 part by weight of γ-acryloxypropyltrimethoxysilane was added as an adhesion improver to 100 parts by weight of the resin solid content to prepare an overcoat material. Obtained. Using this material, an overcoat layer was formed in the same manner as in Example 1, and each test was conducted.
The results are shown in Table 1 below.

Example 6 To the overcoat material obtained in Example 1, 1 part by weight of zinc octylate was added as a curing catalyst to 100 parts by weight of the resin solid content to obtain an overcoat material. Using this material, an overcoat layer was formed in the same manner as in Example 1, and each test was conducted. The results are shown in Table 2 below.

Example 7 In addition to the overcoat material obtained in Example 1, the following general formula was used as a crosslinking agent.

[0058]

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50 parts of the oxime type crosslinking agent of (1) was added to 100 parts of the resin solid content to obtain an overcoat material. Using this material, an overcoat layer was formed in the same manner as in Example 1, and each test was conducted. The results are shown in Table 2 below.

Example 8 To the overcoat material obtained in Example 7, 1 part of γ-aminopropyltriethoxysilane was added as an adhesion improver to 100 parts of resin solid content to obtain an overcoat material. It was Using this material, an overcoat layer was formed in the same manner as in Example 1, and each test was conducted. The results are shown in Table 2 below.

Example 9 A partial hydrolyzate of CH ₃ Si (OCH ₃ ) ₃ (average dimer) was added to a butyl carbitol acetate solution of a polyester resin containing isophthalic acid and trimethylolpropane as monomer components. , The polyester resin is hydrolyzed and condensed to give a silicone resin part /
Polyester resin part (solid content ratio) = 4/6, number average molecular weight of 2300, and 60% by weight of resin solid content polyester-modified silicone resin (all hydrocarbon groups directly bonded to silicon atoms of the silicone resin part are methyl groups) Obtained.

Using this polyester-modified silicone resin, an overcoat layer was formed in the same manner as in Example 1 and each test was conducted. The results are shown in Table 2 below.

Comparative Example 1 Example 1 was carried out using a commercially available acrylic silicone material (trademark: Glass Stender CC Clear, manufactured by Daido Seika Co., Ltd.).
In the same manner as above, an overcoat layer was formed and each test was conducted. The results are shown in Table 2 below.

Comparative Example 2 Example 1 was carried out using a commercially available sol-gel-based silicone hard coat agent (trademark: KP85, manufactured by Shin-Etsu Chemical Co., Ltd.).
In the same manner as above, an overcoat layer was formed and each test was conducted. The results are shown in Table 2 below.

[0065]

[Table 1]

[0066]

[Table 2]

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of an electrode plate obtained by using the overcoat material of the present invention.

[Explanation of symbols]

 1 Transparent Substrate 2 Black Matrix 3 Color Filter (Blue) 4 Color Filter (Green) 5 Color Filter (Red) 6 Overcoat Layer 7 Transparent Electrode

Claims (4)

[Claims] 1. The solid content ratio of the silicone resin portion is 20 to.
A color filter overcoat material comprising 95% by weight of a polyester-modified silicone resin as a film-forming component. 2. The color filter overcoat material according to claim 1, wherein the polyester-modified silicone resin is a resin in which 40 mol% or more of the hydrocarbon groups directly bonded to silicon atoms in the silicone resin portion are methyl groups. 3. The color filter overcoat material according to claim 1, wherein the polyester-modified silicone resin is a resin in which 70 mol% or more of the hydrocarbon groups directly bonded to silicon atoms in the silicone resin portion are methyl groups. 4. The color filter overcoat material according to claim 1, wherein the polyester-modified silicone resin is a resin in which all the hydrocarbon groups directly bonded to silicon atoms in the silicone resin portion are methyl groups.