Patent ID: 6084058
Filing Date: 2000-07-04
Classification: C08G,C09K,G02F,Y10T

Abstract:
A polyimide for a liquid crystal aligning film formed from at least 20 mol % of a diamine, 20 to 79 mol % cyclobutane tetracarboxylic dianhydride, and the remainder mol % being pyromellitic dianhydridediamine, said diamine selected from the group consisting of 4,4'-diaminodiphenyl methane, 3,3'-dimethyl-4,4'-diaminodiphenyl methane, 2,2'-dimethyl-4,4'-diaminodiphenyl methane, 3,3',5,5'-tetramethyl-4,4'-diaminodiphenyl methane, 4,4'-ethylene di-meta-toluidine and mixtures thereof.