Acid anhydrides and dianhydrides of disubstituted maleic anhydri

Details Acid anhydrides and dianhydrides of disubstituted maleic anhydri Acid anhydrides and dianhydrides of disubstituted maleic anhydri

1990-01-08

1991-03-26

Raymond, Richard L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549234, 549240, 549241, 549252, 549253, C07D49304, C07D40702, C07D30789

Patent

active

050030850

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: 4638072 (1987-01-01), Fields et al.

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