Mesomorphic compound, liquid crystal composition, liquid crystal

Details Mesomorphic compound, liquid crystal composition, liquid crystal Mesomorphic compound, liquid crystal composition, liquid crystal

1991-06-10

1993-01-05

Stoll, Robert L.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229901, 549 1, 549 29, 549 59, C09K 1934, C09K 1952

Patent

active

051768453

ABSTRACT:
A mesomorphic compound represented by the following formula (I): ##STR1## wherein R.sup.1 and R.sup.2 respectively denote a linear or branched alkyl group having 3-18 carbon atoms capable of including one or more methylene groups which can be replaced with at least one species of ##STR2## with the proviso that --O-- cannot directly be connected to --O--, and R.sup.2 can also be halogen, --CN or --CF.sub.3 ; X denotes ##STR3## --CH.sub.2 O-- or --OCH.sub.2 ; A denotes ##STR4## and m and n are respecitvely 0 or 1 with the proviso that m+n=0 or 1. The mesomorphic compound is effective for providing a ferroelectric liquid crystal composition showing an improved low-temperature operation characteristic and a decreased temperature-dependence of response speed.

REFERENCES:
patent: 4367924 (1983-01-01), Clark et al.
patent: 5034151 (1991-07-01), Shinjo et al.
Chemical Abstract 91:39226g.
Chemical Abstract 97:38333b.
Chemical Abstract 104:148667j.
Chemical Abstract 109:170169y.
Schadt et al., "Applied Physics Letters," vol. 18, No. 4, pp. 127-128 (1971).
Chemical Abstracts, vol. 109, No. 26 p. 725 abst. No. 241508w (1988).
Chemical Abstracts, vol. 91, No. 5, p. 610 abst. No. 39226g (1979).

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