Lactic acid derivatives and liquid crystal compositions containi

Details Lactic acid derivatives and liquid crystal compositions containi Lactic acid derivatives and liquid crystal compositions containi

1992-04-20

1994-06-28

Stoll, Robert L.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229966, 25229967, 560 65, 560 59, 560 73, 560 80, 560102, C09K 1912, C09K 1920, C07C 6976

Patent

active

053244516

ABSTRACT:
A compound represented by formula (I): ##STR1## wherein R.sub.1 represents an alkyl group having from 1 to 18 carbon atoms; R.sub.2 represents an alkyl group having from 2 to 16 carbon atoms; rings A, B, C, and D each represents a 1,4-phenylene group or a 1,4-phenylene group having one or two halogen atoms; Y represents a single bond, ##STR2## m and n each represents 0 or 1; p represents 0, 1, or 2; q represents 0 or an integer of from 1 to 6; and C* and C** each represents an asymmetric carbon atom in an (S)- or (R)-configuration, and a liquid crystal composition containing the compound of formula (I). The compound of formula (I) is a chiral liquid crystal compound exhibiting large spontaneous polarization, a long helical pitch, an SC* phase in a broad temperature range including room temperature, satisfactory orientation, and a high rate of response.

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patent: 4892675 (1990-01-01), Nohira et al.
patent: 4923633 (1990-05-01), Gray et al.
patent: 5188815 (1993-02-01), Coates et al.

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