阅读说明：本技术 彩色光刻胶组合物 (Color photoresist composition ) 是由 张月红 于 2020-03-18 设计创作，主要内容包括：一种彩色光刻胶组合物,包含5％-10％的颜料分散液；5％-8％的粘合树脂；0.3％-0.8％的光引发剂；以及5％-8％的由下式(I)表示的卟啉类化合物<Image he="595" wi="488" file="DDA0002415605000000011.GIF" imgContent="drawing" imgFormat="GIF" orientation="portrait" inline="no"></Image>M表示为所述卟啉类化合物的中心配位金属,选自于碱土元素或副族元素,或者M表示为两个氢原子；R1表示为具有1至20个C原子的烷基,亦可为1至20个C原子的烷氧基；或者R1表示为可以有取代基的芳基；或者R1表示为氢。(A color photoresist composition comprising 5% to 10% of a pigment dispersion; 5% -8% of adhesive resin; 0.3% -0.8% of photoinitiator; 5% -8% of porphyrin compound represented by the following formula (I))

1. The color photoresist composition is characterized by comprising the following components in percentage by mass:

5% -10% of pigment dispersion liquid;

5% -8% of adhesive resin;

0.3% -0.8% of photoinitiator; and

5% -8% of porphyrin compound represented by the following formula (I)

Wherein M represents a central coordination metal of the porphyrin compound and is selected from alkaline earth elements or elements in a subgroup, or M represents two hydrogen atoms;

R₁is represented by alkyl with 1 to 20C atoms, and also can be alkoxy with 1 to 20C atoms; or R₁Represents an aryl group which may have a substituent; or R₁Denoted as hydrogen.

2. The color photoresist composition of claim 1, wherein: the alkaline earth element is selected from the group consisting of magnesium, calcium, strontium and barium.

3. The color photoresist composition of claim 1, wherein: the subgroup element is selected from the group consisting of copper, iron and zinc.

4. The color photoresist composition of claim 1, wherein: the aryl group is selected from the group consisting of a benzene ring and a naphthalene ring.

5. The color photoresist composition of claim 1, wherein: the aryl group is selected from the group consisting of phenoxy and naphthoxy.

6. The color photoresist composition of claim 1, wherein: the pigment dispersion is selected from the group consisting of a green pigment dispersion, a yellow pigment dispersion, a blue pigment dispersion and a cyan pigment dispersion.

7. The color photoresist composition of claim 1, wherein: the binder resin is selected from acrylic resins.

8. The color photoresist composition of claim 7, wherein: the acrylic resin is selected from one or more of the group consisting of acrylic acid, alkyl methacrylate, aryl methacrylate, alkylaryl methacrylate, succinic acid methacrylate, epoxy acrylate, epoxy methacrylate, epoxy alkyl methacrylate, and epoxy aryl methacrylate.

9. The color photoresist composition of claim 1, wherein: the photoinitiator is selected from one or more of the group consisting of acetophenones, benzoins, bisimidazoles and benzophenones.

10. The color photoresist composition of claim 1, wherein: the color photoresist composition also comprises 0.1-0.2% of additive by mass percent.

Technical Field

The present invention relates to a color photoresist composition, and more particularly, to a color photoresist composition containing porphyrin compounds.

Background

Color Filters (CFs) are an important component of liquid crystal displays. When light passes through red (R), green (G) and blue (B) pixels on the CF, RGB three colors are presented, and various colors to be displayed can be formed through the mixing of the three colors, so that the picture of the liquid crystal display can be colorful. The red, green and blue pixels are formed of color photoresist whose chemical composition mainly includes pigments, binder resins, dyes, photoinitiators, solvents, additives, and the like.

The color characteristics of light, also called color point, x on the horizontal axis and y on the vertical axis, are usually described using two parameters x, y of the CIE1931 color coordinates, which accurately represent the emitted color. Generally, the color point of the display screen refers to the color coordinate of the screen in a bright state, that is, the color point of the screen is represented when the screen displays 255 gray scales, and at this time, the transmission amount of the liquid crystal is maximum, the transmittance of the screen is highest, and the brightness is maximum. The dark color dots refer to the color dot status of the screen when the screen displays 0 gray scale. In the CIE1931 system, dark-state color points have the same scale as bright-state color points, with x and y being used to scale the color coordinates and y being used to scale the brightness, compared to the color points in the bright state.

Most of the products in the market today have small x and y in the CIE1931 color coordinates, mainly because the main light leakage area after the backlight passes through the polarizer in the dark state is blue light (400-.

Disclosure of Invention

In view of the above, the present invention provides a color photoresist composition to solve the problem that dark-state color dots of a liquid crystal display are blue.

To achieve the above objective, an embodiment of the present invention provides a color photoresist composition, which comprises the following components in percentage by mass:

5% -10% of pigment dispersion liquid;

5% -8% of adhesive resin;

0.3% -0.8% of photoinitiator; and

5% -8% of porphyrin compound represented by the following formula (I)

Wherein M represents a central coordination metal of the porphyrin compound and is selected from alkaline earth elements or elements in a subgroup, or M represents two hydrogen atoms;

r1 represents an alkyl group having 1 to 20C atoms, and may also be an alkoxy group having 1 to 20C atoms; or R1 represents an aryl group which may have a substituent; or R1 represents hydrogen.

In one embodiment of the present invention, the alkaline earth element is selected from the group consisting of magnesium, calcium, strontium and barium.

In one embodiment of the present invention, the subgroup element is selected from the group consisting of copper, iron and zinc.

In one embodiment of the present invention, the aryl group is selected from the group consisting of a benzene ring and a naphthalene ring.

In one embodiment of the present invention, the aryl group is selected from the group consisting of phenoxy and naphthoxy.

In one embodiment of the present invention, the pigment dispersion is selected from the group consisting of a green pigment dispersion, a yellow pigment dispersion, a blue pigment dispersion and a cyan pigment dispersion.

In one embodiment of the present invention, the adhesive resin is selected from acrylic resins.

In an embodiment of the present invention, the acrylic resin is selected from one or more of the group consisting of acrylic acid, alkyl methacrylate, aryl methacrylate, alkylaryl methacrylate, succinic acid methacrylate, epoxy acrylate, epoxy methacrylate, epoxy alkyl methacrylate, and epoxy aryl methacrylate.

In an embodiment of the invention, the photoinitiator is selected from one or more of the group consisting of acetophenones, benzoins, bisimidazoles and benzophenones.

In an embodiment of the invention, the color photoresist composition further includes 70% to 85% by mass of a solvent.

In an embodiment of the invention, the color photoresist composition further includes 0.1-0.2% by mass of an additive.

Compared with the prior art, the porphyrin compound of the color photoresist composition can absorb blue light with the wavelength of 400-450nm, and has higher transmittance for other wavelengths of light. In addition, the porphyrin compound has high solubility in an organic solvent, simple and convenient synthesis and high stability to photo-thermal acid and alkali, and further can solve the problem that dark-state color points of a liquid crystal display screen are blue.

Detailed Description

The following description of the embodiments is intended to illustrate specific embodiments in which the invention may be practiced.

One embodiment of the present invention provides a color photoresist composition, which comprises the following components by mass:

5% -10% of pigment dispersion liquid;

5% -8% of adhesive resin;

0.3% -0.8% of photoinitiator; and

5% -8% of porphyrin compound represented by the following formula (I)

Wherein M represents a central coordination metal of the porphyrin compound and is selected from alkaline earth elements or elements in a subgroup, or M represents two hydrogen atoms; r1 represents an alkyl group having 1 to 20C atoms, e.g. -C₅H₁₂-、-C₆H₁₄-, may also be alkoxy of 1 to 20C atoms, e.g. -OC₄H₁₀-、-OC₅H₁₂-、 -OC₆H₁₄-、-OC₈H₁₈-; or R1 represents an aryl group which may have a substituent; or R1 represents hydrogen. Specifically, the alkaline earth element is selected from the group consisting of magnesium, calcium, strontium, and barium. The subgroup element is selected from the group consisting of copper, iron and zinc. The aryl group is selected from the group consisting of a benzene ring and a naphthalene ring. Preferably, the aryl group is selected from the group consisting of phenoxy and naphthoxy. Preferably, the organic solvent is selected when coating the photoresist because the porphyrin compound has better solubility in the organic solvent. Alternative organic solvents include CCl₃、CH₃COOCH₃DMF, DMSO, etc., one or more of which can be selected as the solvent of the porphyrin compound.

The pigment dispersion is selected from the group consisting of a green pigment dispersion, a yellow pigment dispersion, a blue pigment dispersion and a cyan pigment dispersion. The pigment dispersion liquid can be selected according to the actual requirement of the color photoresist composition, and the proportion of the pigment dispersion liquid can be adjusted to be mixed to prepare the required pigment dispersion liquid.

The binder resin is selected from acrylic resins. Specifically, the acrylic resin is one or more selected from the group consisting of acrylic acid, alkyl methacrylate, aryl methacrylate, alkylaryl methacrylate, succinic acid methacrylate, epoxy acrylate, epoxy methacrylate, epoxy alkyl methacrylate, and epoxy aryl methacrylate.

The photoinitiator is selected from one or more of acetophenones, benzoin, bisimidazoles and benzophenones, wherein the acetophenones comprise α -diethoxyacetophenone and 2-methyl-2-morpholino-1- (4-methylphenylsulfanyl) propane-1-one, the benzoin comprises benzil, benzoin ether, and the bisimidazoles comprise hexaaryldiimidazole.

The color photoresist composition also comprises 70-85% of solvent by mass percent. Preferably, the solvent is selected from high boiling point ester solvents, which may be selected from one or more of the group consisting of ethylene glycol ethyl ether acetate, diethylene glycol butyl ether acetate, and propylene glycol monomethyl ether ester. The solvent may also be an ether solvent selected from one or more of the group consisting of ethylene glycol dimethyl ether, diethylene glycol diethyl ether, ethylene glycol dibutyl ether; alternatively, the solvent may be a ketone solvent selected from one or more of the group consisting of cyclohexanone and isophorone.

The color photoresist composition also comprises 0.1-0.2% of additive by mass percent. In detail, the additive may be one or more selected from the group consisting of a silane coupling agent, an antioxidant, an ultraviolet absorber, a defoaming agent, and a leveling agent.

Although the present application has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present application, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, so that the scope of the present application shall be limited by the appended claims.