Patent ID: 6946169

Claim:
A polyamic acid composition comprising a polyamic acid A providing a polyamide having excellent electrical properties, and a polyamic acid B comprising a diamine having side chains, wherein said polyamic acid A is a polyamic acid comprising an acid component containing aliphatic tetracarboxylic dianhydride, or an acid component containing aliphatic tetracarboxylic dianhydride and alicyclic tetracarboxylic dianhydride, and an amine component based on at least one of armoatic diamine represented by the following formula (1); wherein, X 1 is a divalent aliphatic group; each R 1 is independently hydrogen atom or CH 3 ; and a and b are 1 to 2, and said polyamic acid B is a polyamic acid comprising an acid component containing 50 mole % or more aromatic tetracarboxylic dianhydride, and an amine component containing a diamine having a group enabling the pre-tilt angle of a liquid crystal to be increased on the side chain thereof, the ratio A/B of the polyamic acid A to the polyamic acid B being 50/50 to 95/5 (by weight).