Patent ID: 6916898
Filing Date: 2005-07-12
Classification: C08G

Abstract:
1. A process of preparing a polyimide comprising effecting an imidization reaction of a diamine and an aromatic tetracarboxylic dianhydride in a solvent containing 50 to 100% by weight of an equimolar composition of a nitrogen-containing cyclic compound indicated by chemical formula (1) below and a phenol indicated by chemical formula (2) below: in formula (1), X represents —CH 2 — or —N(CH 3 )—, and in formula (2), R 1 and R 2 may be the same as, or different from, each other and represent each any one of —H, —OH, —CH 3 , —C 2 H 5 , —C 3 H 7 , —C 4 H 9 , —C 5 H 11 , —C 6 H 13 , —C 7 H 15 , —C 8 H 17 , —C 9 H 19 , —C 10 H 21 , —OCH 3 , —O(C 6 H 5 ), —NO 2 , —Cl, —Br and —F.