Process of preparing dioxydiphthalic anhydride

Details Process of preparing dioxydiphthalic anhydride Process of preparing dioxydiphthalic anhydride

1990-03-13

1991-03-26

Raymond, Richard L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549241, C07D30789

Patent

active

050030868

ABSTRACT:
Dioxydiphthalic anhydride is prepared by the reaction of dihalophthalic anhydride with an alkali metal compound, such as potassium carbonate. The compound is particularly useful as a monomer in the preparation of polyimides.

REFERENCES:
patent: 4697023 (1987-09-01), Schwartz et al.
patent: 4837404 (1989-06-01), Schwartz et al.

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