Liquid crystalline compound

Details Liquid crystalline compound Liquid crystalline compound

1989-12-22

1993-02-02

Stoll, Robert L.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229901, 568585, 568588, 568669, 570127, 570131, C09K 1930, C09K 1952, C07C 43225, C07C 2800, C07C 2500

Patent

active

051835878

ABSTRACT:
A liquid crystal compound having a relatively low viscosity, a superior compatibility with other liquid crystalline compounds and suitable for preparing a liquid crystal device having a high response rate, and a superior liquid crystal composition containing the compound are provided, which compound is expressed by the formula ##STR1## wherein R.sup.1 is H, F, Cl, CN or 1-20C alkyl or alkenyl in which alkenyl one --CH.sub.2 -- group or two not adjacent --CH.sub.2 -- groups may be replaced by --O-- and in which alkenyl the position and number of the double bond may be optionally chosen; A.sup.1, A.sup.2 and A.sup.3 are ##STR2## the H atom(s) of which ##STR3## may be replaced by F, Cl or methyl; B.sup.1 and B.sup.2 are --CH.sub.2 CH.sub.2 --, --CH.sub.2 O--, --OCH.sub.2 -- or single bond; n is 0 or 1; and m is 0 to 20.

REFERENCES:
patent: 4877548 (1989-10-01), Kitano et al.
patent: 4880562 (1989-11-01), Kitano et al.
Chemistry Letters: vol. 2, Feb. 1989, pp. 309-312, The Chemol. Society of Japan, Uno et al.: "A Novel Generation and Behavior of Alkylfluorocarbenoids from .alpha.,.alpha.-Chlorofluoroalkyl Sulfoxides".

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