Liquid crystal-aligning coating and a liquid crystal display ele

Details Liquid crystal-aligning coating and a liquid crystal display ele Liquid crystal-aligning coating and a liquid crystal display ele

1990-02-02

1992-10-06

Stoll, Robert L.

Compositions

Liquid crystal compositions

Containing nonchiral aligning agents

359 75, 528314, 528320, 528322, 528423, 528424, C09K 1956, G02F 113, C08G 7306, C08G 7310

Patent

active

051529181

ABSTRACT:
An improved liquid crystal-aligning coating composed mainly of a specified high molecule, mainly a polyether polyimide or a polyimide, and capable of controlling the alignment and pretilt angle of liquid crystals; a liquid crystal display element using the coating; and a dinitro compound and a diol compound each as an intermediate of a diamino compound constituting the polyimide ether, are provided, which specified high molecule contains in its molecular long chain, a substituted cyclohexylidene group or a cyclohexylidene group expressed by the formula ##STR1## wherein R.sub.1 to R.sub.6 of the cyclohexyl group each represent H, 1-15C alkyl group, a cyclohexyl group or a cyclohexyl group having 1-15C alkyl group, and may be each the same or partly or totally different.

REFERENCES:
patent: 4405208 (1983-09-01), Shirai
patent: 4494824 (1985-01-01), Nakamura et al.
patent: 4749777 (1988-06-01), Kohtoh et al.
patent: 4879059 (1989-11-01), Hanya et al.
patent: 5008456 (1991-04-01), Murata et al.
Reviews in Macromolecular Chemistry, vol. 12, 1974/1975, pp. 101-129 Korshak et al., "Cardo polymers".

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