Modified polyamic acid from aminophthalic acid anhydride and dia

Details Modified polyamic acid from aminophthalic acid anhydride and dia Modified polyamic acid from aminophthalic acid anhydride and dia

1977-08-03

1978-12-26

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

528310, 528311, 528331, C08G 6912, C08G 6948

Patent

active

041317300

ABSTRACT:
Processes are described for the preparation of substantially pure aminophthalic anhydrides and for polymerizing these monomers to unmodified and modified improved polyamic acid and polyimides.

REFERENCES:
patent: 3951922 (1976-04-01), Richter et al.

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