Process of preparing polyamide-imide and polyimide polymers from

Details Process of preparing polyamide-imide and polyimide polymers from Process of preparing polyamide-imide and polyimide polymers from

1990-01-08

1992-03-24

Kight, III, John

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

Synthetic resins

From carboxylic acid or derivative thereof

528176, 528179, 528182, 528183, 528188, 528345, 528353, 549232, 549241, C08G 7314, C07D49304

Patent

active

050989910

ABSTRACT:
A process is disclosed for preparation of anhydrides containing additional carboxylic acid moieties and dianhydrides of disubstituted maleic anhydride compounds wherein the acid anhydrides and dianhydrides retain their alkene character. The resulting alkene compounds are useful as precursors for polyesters, thermally stable polyamide-imides and polyimides which are also disclosed, as well as a process for their preparation.

REFERENCES:
patent: 4596867 (1986-06-01), Fields et al.
patent: 5003085 (1991-03-01), Behrend et al.

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