Thermally stable polyimide and preparation process of polyimide

Details Thermally stable polyimide and preparation process of polyimide Thermally stable polyimide and preparation process of polyimide

1991-11-21

1994-02-15

Kight, III, John

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

Synthetic resins

From carboxylic acid or derivative thereof

528125, 528126, 528128, 528170, 528172, 528179, 528188, 528207, 528208, 528222, 528229, 528317, 528322, 528351, 528352, C08G 6926, C08G 7310

Patent

active

052868400

ABSTRACT:
A thermally stable polyimide which is blocked at the polymer terminal with a dicarboxylic acid anhydride represented by the formula (III): ##STR1## wherein Z is a divalent radical selected from the group consisting of a monoaromatic radical which is substantially unsubstituted or substituted with a radical having no reactivity with amine or dicarboxylic acid anhydride and has from 6 to 15 carbon atoms, a condensed polyaromatic radical or a noncondensed aromatic radical connected each other with a direct bond or a bridge member, and has a fundamental skeleton represented by recurring structural units of the formula (IV): ##STR2## and a process of preparing the polyimide.

REFERENCES:
patent: 3959350 (1976-05-01), Rogers
patent: 3998786 (1976-12-01), D'Alelio
patent: 4742153 (1988-05-01), Sutton, Jr.

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