Polymers prepared from 4,4'-bis[2-(3,4-(dicarboxyphenyl)hexafluo

Details Polymers prepared from 4,4'-bis[2-(3,4-(dicarboxyphenyl)hexafluo Polymers prepared from 4,4'-bis[2-(3,4-(dicarboxyphenyl)hexafluo

1987-11-24

1990-06-05

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, 528172, 528173, 528229, 528352, C08G 6926, C08G 802, C08G 1400

Patent

active

049315404

ABSTRACT:
This invention relates to new fluorine-containing polyimides, polyamide-acids/esters, polyamides, addition polyimides and imide oligomers which exhibit low melting points, better solubilities, low dielectric constants, superior thermal and thermal oxidative stability, and improved processing characteristics.
The products of this invention are characterized by the fact that they are derived from 4,4'-bis[2-(3,4-(dicarboxyphenyl)hexafluoroisopropyl]diphenyl ether dianhydride.

REFERENCES:
patent: 3890272 (1975-01-01), D'Alelio
patent: 4395514 (1983-07-01), Edelman
patent: 4552931 (1985-11-01), St. Clair et al.
patent: 4668766 (1987-05-01), Treybig

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