Process for the production of polyamide-polyamide-acid copolymers

摘要

A process for producing polyamide-polyamide-acid copolymers having an inherent viscosity of from 0.1 to 2.5 and cyclized derivatives thereof is disclosed, which process comprises reacting a polyamide-acid block having an average molecular weight of from 750 to 20,000 with a dicarboxylic acid dichloride and a diamine. The resultant polyamide-polyamide-acid copolymers are distinguished by good processing characteristics as well as good electrical, thermal and/or mechanical properties.