Light shading resin composition for color filter and color filter

Abstract

The invention relates to a light shading resin composition for color filter, the characteristic of which is that it contains 80~90 wt% of solvent and solid content; relative to solid content, it contains 8~35 wt% of acrylic acid series photosensitive resin, 45~65 wt% of black pigment, silicon surfactant or fluorin surfactant and initiator for photopolymerization whose HLB value is below 8. The viscosity of the resin composition is between 1.0 and 10.0mPa.s; relative to all solvents, it contains 30~50 wt% of the first solvent having a acetoxyl group in molecule, 0~25 wt% of propylene-glycol diacetate as the second solvent, 30~50 wt% of the third solvent having structure of 3-ethoxy propionic acid in molecule, 10~30 wt% of alicyclic compound having a carbonyl as the fourth solvent. Consequently, it has excellent evenness when coating, dryness of coating substrate and solid components' solubility.

Description

technical field [0001] The present invention relates to a light-shielding resin composition for a color filter, and a color filter formed using the same, the light-shielding resin composition for a color filter being produced by a liquid-saving slit coater A coating device such as a slit coater can form a coating film and is used for color filters such as liquid crystal displays. Background technique [0002] Color filters are widely used for colorization purposes such as liquid crystal displays, and generally red, green, and blue primary color pixels (pixels) are arranged in a mosaic manner for use. In order to ensure the contrast of the displayed image, a method of forming a light-shielding grid (hereinafter referred to as a black matrix) is used between the pixels of the three primary colors of red, green, and blue. The method for producing the black matrix of such a filter is known as a pigment dispersion method and a vapor deposition method, but a light-shielding resin...

AI Technical Summary

Problems solved by technology

However, in the combination of these solvents, the dispersibility of the black pigment with a solid content of 45% or more and the solubility of acrylic photosensitive resins with a solid content of 8% or more and a large amount of photopolymerization initiators are simultaneously satisfied. In light-shielding resist inks, there are problems of insufficient solubility, pigment dispersibility, and storage stability