Polyimide films from pyromellitic dianhydride and 2-2'-bis(perfl

Details Polyimide films from pyromellitic dianhydride and 2-2'-bis(perfl Polyimide films from pyromellitic dianhydride and 2-2'-bis(perfl

1995-08-08

1997-09-23

Seidleck, James J.

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

Synthetic resins

From carboxylic acid or derivative thereof

528125, 528128, 528170, 528172, 528173, 528176, 528183, 528188, 528220, 528229, 528350, 428 1, 4284735, 359 36, C08G 6926, C08G 7310

Patent

active

056706090

ABSTRACT:
A polyimide alignment film based on pyromellitic dianhydride and a 2,2'-bis(perfluoroalkoxy)benzidine, as major components, for use in liquid crystal display devices.

REFERENCES:
patent: 5071997 (1991-12-01), Harris
patent: 5286841 (1994-02-01), Auman et al.
patent: 5344916 (1994-09-01), Harris et al.
Patent Abstracts of Japan, vol. 17, No. 166 (P-1514), 30 Mar. 1993 & JP-A-04 328524 (Nippon Telegraph & Telephone Corp).

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