Liquid crystal compounds

Details Liquid crystal compounds Liquid crystal compounds

1978-11-14

1980-07-08

Torrence, Dolph H.

Compositions

Liquid crystal compositions

260465R, 260649R, 568807, 350350R, C09K 334, C07C12164, C02F 113

Patent

active

042116660

ABSTRACT:
Novel compounds, 4-alkyl-cyclohexenes having at the 1-position thereof p-cyanophenyl group or 4'-cyano-4-biphenylyl group, expressed by the general formula ##STR1## wherein R represents a straight alkyl group having 1.about.9 carbon atoms and n represents 1 or 2; methods for producing the same; and nematic liquid crystal (L.C.) compositions comprising at least one member selected from the group consisting of said compounds, are provided.
Said compounds having a cyclohexene ring have a lower viscosity than conventional L.C. compounds, and have effectivenesses of short response time when applied to L.C. display apparatus; superior compatibility with other L.C. compounds to form convenient L.C. mixture; and no need of separating cis- and trans-forms in the midway step of the preparation as in the prior art.

REFERENCES:
patent: 3947375 (1976-03-01), Gray et al.
patent: 4130502 (1978-12-01), Eidenschink et al.
Hahn et al., J. Amer. Chem. Soc., vol. 90 (13), p. 3413 (1968).

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