Compositions – Liquid crystal compositions – Containing nonsteryl liquid crystalline compound of...
Patent
1981-08-03
1983-07-05
Torrence, Dolph H.
Compositions
Liquid crystal compositions
Containing nonsteryl liquid crystalline compound of...
260455R, 260465R, 260465D, 260465F, 560 8, 560 56, 560119, C09K 334, C07C 69753, C07C12146
Patent
active
043917313
ABSTRACT:
Compounds of the formula ##STR1## wherein ring A is saturated or aromatic and a saturated ring A which may be present is trans-linked with the second ring; R.sup.1 is a straight-chain alkyl or alkoxy group containing 1 to 11 carbon atoms; R.sup.2 is cyano, a straight-chain alkyl group containing 1 to 11 carbon atoms, an ester group of the formula ##STR2## or, when ring A is saturated, additionally a straight-chain alkoxy group containing 1 to 11 carbon atoms; in the ester group of formula II ring B is either aromatic and X is oxygen or sulfur and R.sup.3 is cyano or a straight-chain alkyl or alkoxy group containing 1 to 10 carbon atoms, or ring B is a trans-1,4-disubstituted cyclohexane ring and X is oxygen and R.sup.3 is cyano or a straight-chain alkyl group containing 1 to 10 carbon atoms; and the total number of carbon atoms in the alkyl and/or alkoxy groups amounts to at most 12, are described. The compounds of formula I are useful in liquid crystal mixtures.
REFERENCES:
patent: 3925237 (1975-12-01), Ross
patent: 4119558 (1978-10-01), Coates et al.
patent: 4214093 (1980-07-01), Fujii et al.
Coates et al., Mol. Cryst. Liq. Cryst., vol. 41, pp. 119-124, (1978).
Coates et al., Mol. Cryst. Liq. Cryst., vol. 37, pp. 249-262, (1976).
Raramyshiva et al., Chemical Abstracts, vol. 86, 63874j, (1977).
Coates et al., Chemical Abstracts, vo. 89, 42123k, (1978).
Boller Arthur
Schadt Martin
Villiger Alois
Hoffmann-La Roche Inc.
Isgro William G.
Leon Bernard S.
Saxe Jon S.
Torrence Dolph H.
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