Compositions – Liquid crystal compositions – Containing nonsteryl liquid crystalline compound of...
Patent
1998-08-31
2000-09-12
Wu, Shean C.
Compositions
Liquid crystal compositions
Containing nonsteryl liquid crystalline compound of...
25229961, 25229966, 570127, 570131, 570182, 570188, C09K 1930, C09K 1912, C07C 2500
Patent
active
061173614
ABSTRACT:
A compound represented by the following general formula (1) is provided. This has broader temperature range of nematic phase, lower viscosity and higher miscibility with other liquid crystal compounds at low temperature than those of conventional liquid crystal compounds, and the compounds have high chemical stability. ##STR1## wherein H.sub.1 to H.sub.8 represent independently a hydrogen atom or a halogen atom, provided that at least one of them is a halogen atom; R.sub.1 represents a moiety which is an alkyl group having 2 to 20 carbon atoms provided that one or more methylene groups (--CH.sub.2 --) which are not successive in the alkyl group are replaced with an oxygen atom (--O--) in the form of ether; Y.sub.1 represents an alkyl group having 1 to 20 carbon atoms, and one or more methylene groups in Y.sub.1 independently may be replaced with an oxygen atom, a sulfur atom, a dihydroxysilyl group, a dimethylsililene group, --CH.dbd.CH-- or --C.tbd.C--; X.sub.1 to X.sub.3 represent independently a covalent bond, a 1,2-ethylene group or a 1,4-butylene group.
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"The effect of lateral fluoro-substitution on the liquid crystal behavior of some 4"-alkylphenylethyl-and trans-4"-alkylcyclohexylethyl-4,4'-distributed biphenyls," G. W. Gray, D. Lacey, J.E. Stanton and K.J. Toyne. Liquid Crystals, vol. 1, No. 5, pp. 407-413, 1986.
Hachiya Norihisa
Kondo Tomoyuki
Matsui Shuichi
Miyazawa Kazutoshi
Nakagawa Etsuo
Chisso Corp.
Wu Shean C.
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