Polyimide

Details Polyimide Polyimide

1995-10-20

1997-12-02

Lee, Helen

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

With charge transferring layer of specified composition

560 19, 560 50, C09K 1900

Patent

active

056933797

ABSTRACT:
A polyamic acid is herein disclosed which contains a structural unit ##STR1## wherein m is an integer of 1 to 20; n is an integer of 1 to 2; and R.sup.2 is an alkyl group or an alkoxy group having 1 to 20 carbon atoms. Furthermore, a polyamic acid composition is also disclosed which comprises the polyamic acid containing the structural unit represented by the than mentioned above. By heating the polyamic acid or the polyamic acid composition at a low temperature for a short time, a liquid crystal alignment film can be obtained therefore.

REFERENCES:
patent: 4874834 (1989-10-01), Higashi et al.
patent: 4876330 (1989-10-01), Higashi et al.

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