Dicyclohexyl-3,4,3',4'-tetracarboxylic acid or dianhydride there

Details Dicyclohexyl-3,4,3',4'-tetracarboxylic acid or dianhydride there Dicyclohexyl-3,4,3',4'-tetracarboxylic acid or dianhydride there

1988-10-03

1990-09-18

Welsh, Maurice J.

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

Synthetic resins

From carboxylic acid or derivative thereof

428 1, 549465, C08G 6926

Patent

active

049580019

ABSTRACT:
A polyimide obtained from a polyamide-acid or polyamide-acid ester prepared by reacting dicyclohexyl-3,4,3', 4'-tetracarboxylic acid or dinanhydride with a diamine is excellent in transparency, heat resistance and mechanical properties, said polyimide being able to be obtained at a lower temperature, and particularly suitable for an orientation film used in a liquid crystal display device.

REFERENCES:
patent: 2931789 (1960-04-01), Wielicki

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