C - Chemistry – Metallurgy – 09 – C
Patent
C - Chemistry, Metallurgy
09
C
C09C 1/48 (2006.01) C08K 3/04 (2006.01) C08K 9/00 (2006.01) G02B 5/22 (2006.01) G02F 1/1335 (2006.01)
Patent
CA 2175134
This invention provides a resin black matrix with a light- shading agent dispersed in a resin, comprising carbon black satisfying at least one of the following features of (A) to (D), as the light-shading agent: (A) 6.5 or less in pH (B) 0.001 < [COOH] in the carboxyl group concentration [COOH] on the surface, as a molar ratio per all carbon atoms (C) 0.001 < [OH] in the hydroxyl group concentration [OH] on the surface, as a molar ratio per all carbon atoms (D) 0.001 < [SO3H] in the sulfonic acid group concentration [SO3H] on the surface, as a molar ratio per all carbon atoms. The present invention also provides a black paste with a light-shading agent dispersed in a resin or its precursor solution, comprising carbon black satisfying at least one of the above features of (A) to (D) as, the light-shading agent. The third aspect of the present invention is a color filter, comprising the resin black matrix. The color filter of the present invention is, by using the carbon black, high in light-shadability and can display images with excellent quality when set in liquid crystal display devices.
Goto Tetsuya
Inoue Keijiro
Tomita Fumio
Smart & Biggar
Toray Industries Inc.
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