High transmittance and high solubility macromolecular dye, color photosensitive resin composition and color filter

Abstract

The invention proposes a macromolecular dye, which not only has good oil solubility and high transmittance, but also has suitable hue, environmental tolerance, color fastness and low migration property. The invention also proposes a color photosensitive resin composition using the macromolecular dye and a color filter prepared by using the composition, which have better heat resistance, light resistance, brightness and contrast. The dye has a structural formula as shown in formula (1): wherein, M is Ti, Cr, Mn, Co, Ni, Cu, Zn or Cd; X 1 ~X 4 are halogen, which can be the same or different; a~d each represent an integer of 0~3; R 1 ~R 4 Can be the same or different, its structure is as follows; R 5 The structure of is as follows, e represents an integer from 1 to 5, when e is greater than 1, the e bar R on the phenoxy group 5 Can be the same or different; r, n, m, p, q are zero or positive integers and r+q+p+n+m≥10; R 6 The structure of the is as follows;

Description

technical field [0001] The invention relates to a macromolecular dye with phthalocyanine as the core, a color photosensitive resin composition (or color photoresist) using the macromolecular dye, and a color filter prepared using the color photosensitive resin composition. Background technique [0002] The color filter is an important part of the thin film transistor liquid crystal display (TFT-LCD), and its function is to filter the white backlight emitted by the backlight into the three primary colors of red, green and blue. The chromaticity of the three primary colors filtered by the color filter is directly related to the color gamut and color performance of the LCD. The higher the brightness of the color filter, the higher the brightness of the LCD. At present, the mainstream process for manufacturing color filters is the pigment dispersion method, which is to apply the monochromatic photosensitive resin composition as a raw material on a glass substrate, heat to remove...

AI Technical Summary

Problems solved by technology

[0012] (1) Compared with the pigment in the molecular aggregation state, the heat resistance and light resistance of the dye in the molecular dispersed state are insufficient, and the insufficient heat resistance is mainly manifested in the preparation of color filters by the pigment dispersion method and in the formation of LCD or flat panels. Indium tin oxide (ITO) thin films of display (FPD) electrodes have the problem of changing chromaticity and optical characteristics due to high temperature process

Insufficient light resistance is reflected in the process of preparing color filters by the pigment dispersion method, and ultraviolet light may affect the chromaticity and optical properties of the dyes in the color photosensitive resin composition;

[0013] (2) Some small molecular dyes are volatile and sublimated, and escape during the color filter manufacturing process, causing adverse effects on equipment or other components of TFT-LCD;

[0014] (3) Compared with the pigments in the molecular aggregation state, the dyes in the molecular dispersion state have insufficient resistance to organic solvents, and are easily dissolved by solvents of other materials during the color filter manufacturing process, resulting in chromaticity changes;

[0015] (4) Some dyes have weak solubility in organic solvents. For those dyes with low molar extinction coefficient and poor solubility, it is difficult to increase the color saturation of the color filter by increasing the colorant content;

[0016] (5) Certain dyes are highly soluble in alkaline aqueous solution, which can easily lead to chromaticity changes caused by the dissolution of the dye by the developer during the alkaline development process of the color filter;

[0017] (6) Certain dyes tend to inhibit free radical polymerization, thereby reducing the photocuring performance of the colored photosensitive resin composition;

[0018] (7) The dye may interact with other components in the color photosensitive resin composition, and it is difficult to control the solubility of the exposed part and the non-exposed part, which affects the developing performance of the color photosensitive resin composition;

[0019] (8) When a coloring pattern is formed from a colored photosensitive resin composition using a dye, the dye may penetrate into previously formed pixels of different colors and cannot be completely eluted during development, thereby causing color mixing (dye migration);

[0020] (9) In a colored photosensitive resin composition using a dye, when heat treatment is performed after film formation, thermal diffusion (color transfer) easily occurs between adjacent pixels or between adjacent layers, possibly causing color mixing;

[0021] (10) The dye may form a development residue after intensified development (Development residue, remaining on the substrate or a previously formed pattern or pixel of a different color), and thus cause color mixing

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