Polyimide resin and insulating film for electric and electronic

Details Polyimide resin and insulating film for electric and electronic Polyimide resin and insulating film for electric and electronic

1990-04-26

1991-12-03

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, 528182, 528185, 528350, 528351, 528352, 427 58, 4284735, C08G 6926, C08G 802, C08G 7310

Patent

active

050701827

ABSTRACT:
A polyimide resin having a repeating unit of the formula: ##STR1## wherein R.sub.1 is a tetravalent organic group constituting a tetracarboxylic acid or its derivative, wherein four atoms directly bonded to the four carbonyl groups are carbon atoms having no unsaturated bond, and R.sub.2 is a bivalent organic group constituting a diamine.

REFERENCES:
patent: Re33342 (1990-09-01), Kohtoh et al.
patent: 4681928 (1987-07-01), Berger et al.
patent: 4749777 (1988-06-01), Kohtoh et al.

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