Patent ID: 9346927
Filing Date: 2016-05-24
CPC Classification: C08J,Y10T

Claim Text:
1. A process for producing a colored polyimide molded article, the process comprising: (a) dipping a film obtained by casting and (b) thermally treating the porous polyamic acid film at a temperature of from 350 to 500° C. to obtain the colored polyimide molded article, which is a colored polyimide porous membrane, wherein the coloring precursor is a polymer obtained from an acrylonitrile-comprising monomer, and no carbon black is present in the polyamic composition the tetracarboxylic acid is at least one selected from the group consisting of a biphenyltetracarboxylic dianhydride and pyromellitic dianhydride; and the diamine is at least one selected from the group consisting of p-phenylenediamine diaminodiphenyl ether, and bis(aminophenoxy)benzene.