Diamond compounds and liquid crystal aligning films

Details Diamond compounds and liquid crystal aligning films Diamond compounds and liquid crystal aligning films

1988-03-08

1989-09-05

Kight, John

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528126, 528128, C08G 802, C08G 1400

Patent

active

048640085

ABSTRACT:
The present invention provides diamino compounds and liquid crystal aligning films comprising polyimides which are obtained from the said diamino compounds represented by the general formula: ##STR1## wherein R.sub.1 indicates an alkyl group having 3 to 22 carbon atoms, R.sub.2 indicates a hydrogen atom or an alkyl group having 1 to 22 carbon atoms, and R.sub.3 -R.sub.10 indicate a hydrogen atom or a methyl group, respectively.
The liquid crystal aligning films are useful for STN mode display cells in realizing a high pretilt angle.

REFERENCES:
patent: 4316844 (1982-02-01), Waitkus et al.
patent: 4696994 (1987-09-01), Nakajima et al.

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