Ferroelectric liquid crystal composition and liquid crystal devi

Details Ferroelectric liquid crystal composition and liquid crystal devi Ferroelectric liquid crystal composition and liquid crystal devi

1992-01-17

1994-05-03

Wu, Shean

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25222962, 25229963, 359103, 549302, 549322, C09K 1934, C09K 1932, C07D30793, G02F 113

Patent

active

053085396

ABSTRACT:
A ferroelectric liquid crystal composition including: at least one optically active compound of the formula (I): ##STR1## where R.sup.1 and R.sup.2 are, the same or different, a straight or branched chain alkyl group having 1 to 15 carbon atoms, k represents an integer of 0 or 1, and * represents an asymmetric carbon atom; and
at least one compound selected from the group consisting of: compounds of the formula (II): ##STR2## where R.sup.3 and R.sup.4 are a straight or branched chain alkyl or alkoxy group having 1-15 carbon atoms, ##STR3## and ##STR4## each represents ##STR5## X represents --O--, --CO-- or a single bond, m and n are independently an integer of 0 or 1; compounds of the formula (III): ##STR6## where R.sup.5 and R.sup.6 are, the same or different, a straight or branched chain alkyl or alkoxy group having 1-15 carbon atoms, and p is an integer of 0 or 1;
said ferroelectric liquid crystal composition exhibiting at least nematic phase, smectic A phase and smectic C phase.

REFERENCES:
patent: 5026506 (1991-06-01), Koden et al.
patent: 5084302 (1992-01-01), Inoue et al.
patent: 5151214 (1992-09-01), Koden et al.
Abstract from Derwent Patent Index, Japanese Patent Publication JP-A-052 882, Mar. 7, 1991.
European Search Report, dated Aug. 4, 1992, in which Ref. BC, BD and CA were cited.
CA 101(13):110704u, 1984.

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