Liquid crystal 2,3-dicyano-hydroquinone derivatives

Details Liquid crystal 2,3-dicyano-hydroquinone derivatives Liquid crystal 2,3-dicyano-hydroquinone derivatives

1979-09-12

1981-07-21

Torrence, Dolph H.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

260465D, 350350R, 25229963, 25229964, 25229965, C07C12175, C09K 334, G02F 113

Patent

active

042797705

ABSTRACT:
Liquid crystal materials for liquid crystal display, having a large negative dielectric anisotropy and maintaining a liquid crystal state at a broad temperature range including room temperature are provided. These materials contain novel compounds expressed by the general formula (I) ##STR1## wherein X represents ##STR2## Y represents ##STR3## R.sup.1 and R.sup.3 each represent an alkyl group or an alkyloxy group of 1-10 carbon atoms;

REFERENCES:
patent: 3915883 (1975-10-01), Van Meter et al.
patent: 4099856 (1978-07-01), Weissflog et al.
Baptista et al., J.C.S. Perkin I, pp. 1477-1500, (1977).
Zielinski et al., Chemical Abstracts, vol. 90, 112982m, (1979).

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