Novel liquid crystal compounds and electro-optic devices incorpo

Details Novel liquid crystal compounds and electro-optic devices incorpo Novel liquid crystal compounds and electro-optic devices incorpo

1976-06-17

1977-06-14

Schafer, Richard E.

Compositions

Liquid crystal compositions

252408, 260463, 260465D, 260465F, 260465G, 350160LC, C09K 334, G02F 113, C07C12164, C07C 6996

Patent

active

040295940

ABSTRACT:
Liquid crystal compounds of the formula ##STR1## wherein X can be alkyl (R-), alkoxy (RO-), acyloxy ##STR2## or alkylcarbonato ##STR3## wherein R is an alkyl group from 1-10 carbon atoms, and R.sub.1 -R.sub.3 can be hydrogen, methyl or halogen with the proviso that at least one and no more than two of R.sub.1 -R.sub.3 are substituents other than hydrogen, have positive dielectric anisotropy and are useful in electro-optic devices which comprise a thin liquid crystal layer between two closely spaced parallel electrodes.

REFERENCES:
patent: 3836478 (1974-09-01), Green et al.
patent: 3915883 (1975-10-01), Van Meter et al.
patent: 3947375 (1976-03-01), Gray et al.
patent: 3951846 (1976-04-01), Gavrilovic
patent: 3953491 (1976-04-01), Steinstrasser et al.
Gray, G. W., et al., Liquid Crystals & Plastic Crystals, vol. 1, Ellis Horwood, Ltd., London, pp. 103-152 (1974).
Arora, S. L., et al., J. Org. Chem., vol. 35, No. 12 pp. 4055-4058 (1970).

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