Mesomorphic compound, ferroelectric liquid crystal composition c

Details Mesomorphic compound, ferroelectric liquid crystal composition c Mesomorphic compound, ferroelectric liquid crystal composition c

1989-03-27

1991-07-23

Maples, John S.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229901, 350350R, 350350S, 548143, 548144, 548145, 548136, C09K 1934, C07D27110, C07D27112, C07D41300

Patent

active

050341510

ABSTRACT:
There is disclosed a mesomorphic compound represented by the following formula (I): ##STR1## wherein A.sub.1 denotes a single bond, ##STR2## denotes ##STR3## X denotes hydrogen, a halogen or cyano group; Y denotes oxygen or sulfur; R.sub.1 and R.sub.2 respectively denotes a linear or branched alkyl, alkoxy, alkylcarbonyloxy, alkoxycarbonyl or alkoxycarbonyloxy group each having 1-18 carbon atoms and each capable of having a substituted of chloro, bromo, cyano, alkoxy or akoxycarbonyl group; and B denotes ##STR4## A ferroelectric liquid crystal composition comprises at least two mesomorphic compounds including at least one mesomorphic compound represented by the formula (I). A ferroelectric liquid crystal device is constituted by disposing the ferroelectric liquid crystal composition between a pair of substrates.

REFERENCES:
patent: 4020080 (1977-04-01), Irick et al.
patent: 4667020 (1987-05-01), Etzbach et al.
Dimitrowa, K., et al., J. Prakt. Chemie, vol. 322, No. 6, pp. 933-944, (1980).
Demus, D., et al., Flussige Kristalle in Tabellen II, VEB Deutscher Verlag fur Grundstoffindustrie, Leipzig, pp. 359-361, (1984).
Gray, G. W., et al., Liquid Crystals & Plastic Crystals, vol. 1, Ellis Horwood, Ltd., Chichester, UK, pp. 142-143, (1974).

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