Liquid crystal compounds

Details Liquid crystal compounds Liquid crystal compounds

1992-04-29

1993-04-20

Stoll, Robert L.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

2522995, 25229901, 560 65, 560 76, 560102, 568631, 568647, C09K 1920, C09K 1954, C07C 6976

Patent

active

052040208

ABSTRACT:
Liquid crystal compounds represented by the formula; ##STR1## in which Ra means an alkyl group of 1-20 carbon atoms or an alkoxy group of 1-20 carbon atoms; Rb means an aliphatic alkyl group, a branched alkyl group or an aralkyl group respectively of 1-20 carbon atoms, an alkoxy group of 1-20 carbon atoms, or an alkanoyl methyl group having 1-20 carbon atoms in the alkyl; ##STR2## Z means a fluorinated alkyl or a fluorinated haloalkyl; m is an integer of from 1 to 3; n is an integer of from 0 to 2 where when n is 0, Y is a single bond; and * shows an optically active center, which have a larger spontaneous polarization, high speed of response and good orientation, and show tristable liquid crystal phase.

REFERENCES:
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.
H. Tanguchi et al, "Electrical and Optical Properties of Florinated Ferroelectric Liquid Crystal", Japanese Journal of Applied Physics, vol. 26, Part 1, Supplement 26-2, 1987, pp. 101-103.
K. Yoshino et al, "Florinated Ferroelectric Liquid Crystal and its Dielectric Property", Chemistry Express, vol. 2, No. 1, 1987, pp. 53-56.

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