Compositions – Liquid crystal compositions – Containing nonsteryl liquid crystalline compound of...
Patent
1991-01-28
1992-05-05
Stoll, Robert L.
Compositions
Liquid crystal compositions
Containing nonsteryl liquid crystalline compound of...
25229901, 25229964, 560 59, 560 65, 560 83, 560 64, C09K 1912, C09K 1952, C07C 6976
Patent
active
051104970
ABSTRACT:
An optically active compound represent by formula (I): ##STR1## wherein R.sub.1 represents a fluoroalkyl group having from 1 to 18 carbon atoms; R.sub.2 represents an alkyl group having from 1 to 16 carbon atoms and an aralkyl group having from 6 to 16 carbon atoms; R.sub.3 represents C.sub.2 F.sub.5, CF.sub.3, CHF.sub.2, or CH.sub.2 F; X represents a single bond, --O--, --COO--, or --OCO--; Y represents --COO--, --OCO--, --CH.sub.2 O--, or --OCH.sub.2 --; Z represents --COO-- or --O--; (A) and (B) each represent a cyclic group; and * indicates an optically active center, and a liquid crystal composition containing at least one of said optically active compounds are disclosed. The compound is useful not only as a liquid crystal compound but as a chiral dopant to provide a liquid crystal composition exhibiting a chiral smectic phase.
REFERENCES:
patent: 4886619 (1989-12-01), Janulis
patent: 4911861 (1990-03-01), Higuchi et al.
patent: 4921632 (1990-05-01), Nakamura et al.
Dewent Abstract of JP-A-1-230548.
Sakuma Shigenori
Suzuki Yoshiichi
Yamakawa Noriko
Showa Shell Sekiyu K.K.
Stoll Robert L.
Wu Shean C.
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