Polyimides based on a 9-aryl-9(perfluoroalkyl)-xanthene-2,3,6,7-

Details Polyimides based on a 9-aryl-9(perfluoroalkyl)-xanthene-2,3,6,7- Polyimides based on a 9-aryl-9(perfluoroalkyl)-xanthene-2,3,6,7-

1992-10-23

1994-06-28

Nakarani, D. S.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

4284735, 528176, 528183, 528185, 528188, 528190, 528191, C08G 7310

Patent

active

053248104

ABSTRACT:
Polyimide compositions, films, and electronic devices using polyimides, based on 9-aryl-9(perfluoroalkyl)xanthene-2,3,6,7-dianhydride or 9,9'-bis(perfluoroalkyl)xanthene-2,3,6,7-dianhydride and benzidine derivatives. These polyimides offer a combination of low linear coefficient of thermal expansion, low dielectric constant, and low water absorption.

REFERENCES:
patent: 5051520 (1991-09-01), Trofimenko
patent: 5071997 (1991-12-01), Harris
JP-116085 Nov. 05, 1989 Nippon Teleg & Teleph Considered to the extent of English Abstract.

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