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

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

1995-11-01

1998-03-24

Hampton-Hightower, P.

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

Synthetic resins

From carboxylic acid or derivative thereof

528125, 528128, 528172, 528173, 528176, 528183, 528185, 528188, 528220, 528229, 528350, 428 1, 4284735, C08G 7310, C09K 1900, B32B 2734

Patent

active

057314047

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 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.

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