Liquid-crystalline medium

Details Liquid-crystalline medium Liquid-crystalline medium

1994-04-07

1996-01-02

Geist, Gary L.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229966, C09K 1930, C09K 1912

Patent

active

054805813

ABSTRACT:
The invention relates to a liquid-crystalline medium based on a mixture of polar compounds having positive dielectric anisotropy, characterized in that it contains one or more compounds of the general formula I ##STR1## in which X is fluorine, chlorine, CF.sub.3, OCF.sub.3 or OCHF.sub.2, ring A is trans-1,4-cyclohexylene or 1,4-phenylene, and R is alkyl, oxaalkyl, fluoroalkyl or alkenyl, in each case having up to 7 carbon atoms.

REFERENCES:
patent: 5032313 (1991-07-01), Goto et al.
patent: 5230829 (1993-07-01), Bartmann et al.
patent: 5286411 (1994-02-01), Rieger et al.
patent: 5308541 (1994-05-01), Hittich et al.
patent: 5308542 (1994-05-01), Poetsch et al.
patent: 5308543 (1994-05-01), Sasaki et al.

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