The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 04, 1996
Filed:
Jan. 23, 1995
Chao-Wen Niu, Hsinchu, TW;
Jim-Chyuan Shieh, Hsinchu, TW;
Pao J Hsieh, Chilung, TW;
Wen R Lin, Changhua Hsien, TW;
Hsien K Lin, Taipei, TW;
Industrial Technology Research Institute, Hsinchu Hsien, TW;
Nan Ya Plastics Corp., Taipei, TW;
Abstract
An anionic electrodepositable coating composition for making pigment dispersed color filters comprising: (a) a pigment; (b) a first addition copolymer containing pyrrolidone and hydroxy groups; (c) a second addition copolymer containing carboxyl and hydroxy groups; and (d) a low molecular weight amine. The pyrrolidone-containing monomer can be N-vinyl-2-pyrrolidone or a pyrrolidone-containing acrylate-based monomer represented by the following formula: ##STR1## wherein R is hydrogen atom, or methyl or ethyl group, and n is an integer between 1.about.3. The first addition copolymer has a weight average molecular weight between 1,000 and 20,000 and is prepared from a monomer composition comprising about 0.5.about.90 mole percent of a pyrrolidone-containing unsaturated monomer and about 1.about.50 mole percent of a hydroxy-containing unsaturated monomer. The second addition copolymer has a weight average molecular weight between 5,000 and 60,000 and is prepared from a monomer composition comprising about 5.about.30 mole percent of a carboxyl-containing unsaturated monomer and 1.about.50 mole percent of a hydroxy-containing unsaturated monomer. The pigments in the coating composition were measured to have a weight average secondary particle size of less than 0.25 .mu.m, and a polydispersity of less than 1.05.