Liquid crystal mixture and liquid crystal device comprising the

Details Liquid crystal mixture and liquid crystal device comprising the Liquid crystal mixture and liquid crystal device comprising the

1995-10-04

1998-06-09

Kelly, C. H.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229961, 25229963, 25229965, 25229967, 25229966, C09K 1906, C09K 1934, C09K 1930, C09K 1912

Patent

active

057628254

ABSTRACT:
A liquid crystal mixture containing (a) at least one compound of a compound of the formula (1): ##STR1## in which R is a C.sub.1 -C.sub.12 alkyl group, etc.; X.sub.1, X.sub.2, X.sub.3, X.sub.4, Y.sub.1, Y.sub.2, Y.sub.3 and Y.sub.4 represent, independently each other, CH, CF or N; A is a hydrogen atom, a 4-R.sub.1 -(cycloalkyl) group, etc. in which R.sub. is a C.sub.1 -C.sub.12 alkyl group, etc. and p is 0 or 1; and Z is --C.tbd.C-- or a single bond, and (b) at least one compound of the formula (4): ##STR2## wherein rings C, D, E and F represent, independently each other, 1,4-phenylene, etc. which may be substituted by 1, 2 or 3 fluorine atoms; R.sub.2 is a hydrogen atom, a C.sub.1 -C.sub.12 alkyl group, etc.; R.sub.3 is a hydrogen atom, a fluorine atom, a fluoromethyl group, etc.; Z.sub.1, Z.sub.2 and Z.sub.3 represent, independently each other, --COO--, --OCO--, --OCH.sub.2 --, --CH.sub.2 O--, a C.sub.1 -C.sub.5 alkylene group, a C.sub.2 -C.sub.5 alkenylene group, etc.; J and K represent, independently each other, a methylene group or --O--; a, b, c, d and e represent, independently each other, 0 or 1.

REFERENCES:
patent: 5068053 (1991-11-01), Reiffenrath et al.
patent: 5164114 (1992-11-01), Kurmeier et al.
patent: 5447657 (1995-09-01), Schad et al.
patent: 5582767 (1996-12-01), Buchecker et al.
patent: 5658489 (1997-08-01), Higashii et al.

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