Process for forming end capped polyamic acids polyimides

Details Process for forming end capped polyamic acids polyimides Process for forming end capped polyamic acids polyimides

1989-05-26

1990-11-27

Foelak, Morton

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

Synthetic resins

From carboxylic acid or derivative thereof

528125, 528126, 528128, C08G 802, C08C 6926

Patent

active

049736612

ABSTRACT:
This invention discloses a process where a portion of an amine terminated polyamic acid intermediate is end-capped with an aromatic monoanhydride additionally substituted with a free carboxylic acid and a carboxylic ester. The polyamic acids of this invention are readily converted to high molecular weight polyimides.

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patent: 4244853 (1981-01-01), Serafini et al.
patent: 4552931 (1985-11-01), St. Clair et al.
patent: 4742153 (1988-05-01), Sutton, Jr.

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