Process for making polyimides

Details Process for making polyimides Process for making polyimides

1986-12-31

1989-06-06

Kight, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528 26, 528 28, 528125, 528126, 528128, 528173, 528179, 528185, 528351, 528352, C08G 6926

Patent

active

048372994

ABSTRACT:
A process for making thermoplastic polyimides which involves reacting an aromatic dianhydride with an organic diamine in the presence of a tertiary amine in an inert solvent to form a polyamide acid salt; separating the polyamide acid salt from the solvent; and heating the polyamide acid salt under imidization conditions to form the desired polyimide.

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patent: 4417044 (1983-11-01), Parekh

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