Liquid crystal compound

Details Liquid crystal compound Liquid crystal compound

1990-12-27

1992-05-05

Stoll, Robert L.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229967, 25229961, 25229962, 25229963, 560 64, 560 65, 560 83, C09K 1912, C09K 1934, C09K 1920

Patent

active

051104989

ABSTRACT:
A liquid crystal compound represented by formula (I): ##STR1## wherein R.sub.1 represents an alkyl group having from 3 to 18 carbon atoms or an aralkyl group having from 7 to 18 carbon atoms; R.sub.2 represents an alkenyl group having from 1 to 18 (preferably from 3 to 14) carbon atoms; R.sub.3 represents CF.sub.3 or C.sub.2 F.sub.5 ; X represents a single bond, --O--, --COO--, or --OCO--; Y represents --COO--, --OCO--, --CH.sub.2 O--, or --OCH.sub.2 --; A and B each represents a cyclic group; and * indicates an optically active center.
The compound of formula (I) exhibits three stable states of molecular orientation.

REFERENCES:
patent: 4770503 (1988-09-01), Buchecker et al.
patent: 4871472 (1989-10-01), Krause et al.
patent: 4898455 (1990-02-01), Buchecker et al.
patent: 4906401 (1990-03-01), Dubal et al.
patent: 4906752 (1990-03-01), Muller et al.
patent: 4917817 (1990-04-01), Nohira et al.
patent: 4917821 (1990-04-01), Mori et al.
patent: 4918213 (1990-04-01), Nohira et al.
patent: 4921632 (1990-05-01), Nakamura et al.

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