Tolan derivative, liquid crystal composition containing the deri

Details Tolan derivative, liquid crystal composition containing the deri Tolan derivative, liquid crystal composition containing the deri

1992-09-29

1995-08-01

Wu, Shean

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229901, 25229961, 25229962, 25229967, 570127, 359103, C09K 1912, C09K 1952, C07C 2513, G02F 113

Patent

active

054378150

ABSTRACT:
A tolan derivative of a formula: ##STR1## where R represents a linear alkyl group having from 1 to 10 carbon atoms; X.sub.1, X.sub.2 and X.sub.3 independently represent a fluorine atom or a hydrogen atom, provided that one of them is necessarily a fluorine atom and the others are hydrogen atoms; and Y represents a nitrile group or a linear alkyl group having from 1 to 10 carbon atoms; and a liquid crystal composition containing the derivatives; and a liquid crystal display device having the composition are produced. The compound is compatible with other liquid crystal compounds, and by blending the compound with ordinary liquid crystal compounds, a liquid crystal composition having a broadened practical temperature range and an enlarged double refraction anisotropy is obtained.

REFERENCES:
patent: 5084204 (1992-01-01), Reiffenrath et al.
patent: 5198149 (1993-03-01), Reiffenrath et al.

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