Polyimide film from pyromellitic dianhydride and a bis (4-aminop

Details Polyimide film from pyromellitic dianhydride and a bis (4-aminop Polyimide film from pyromellitic dianhydride and a bis (4-aminop

1997-11-20

1999-01-05

Hampton-Hightower, P.

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

Synthetic resins

From carboxylic acid or derivative thereof

349123, 349126, 349127, 349132, 349133, 349134, 349135, 359 36, 359900, 428 1, 4284735, C08G 7310, G02F 1133, G02F 113, C09K 1900

Patent

active

058564322

ABSTRACT:
A polyimide alignment film based on pyromellitic dianhydride and a bis(4-aminophenoxy) aromatic compound, such as 1,3-bis(4-aminophenoxy)benzene or 1,4-bis(4-aminophenoxy)benzene, providing low tilt angles of from 1 to 2 degrees when used in liquid crystal displays.

REFERENCES:
patent: 4847311 (1989-07-01), Yamaya et al.
patent: 5288843 (1994-02-01), Tamai et al.
patent: 5459233 (1995-10-01), Tamai et al.
patent: 5608033 (1997-03-01), Nihira et al.
patent: 5612450 (1997-03-01), Mizushima et al.
patent: 5670609 (1997-09-01), Auman et al.

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