Process for the production of polyamide-polyamide-acid copolymer

Details Process for the production of polyamide-polyamide-acid copolymer Process for the production of polyamide-polyamide-acid copolymer

1977-08-17

1978-11-07

Michl, Paul R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

528333, 528338, C08G 7314

Patent

active

041246519

ABSTRACT:
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.

REFERENCES:
patent: 3471444 (1969-10-01), Sherer
patent: 3894114 (1975-07-01), Lohmann

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