Liquid crystal compositions

Details Liquid crystal compositions Liquid crystal compositions

1982-02-23

1983-06-28

Gron, Teddy S.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229965, 350350R, C09K 334, C02F 113

Patent

active

043904670

ABSTRACT:
A liquid crystal composition comprises at least two compounds selected from the group consisting of trans-4-alkylcyclohexane-1-carboxylic acid-4'-(4"-alkylphenyl)-2'-chlorophenyl ester having the general formula: ##STR1## wherein R and R' are normal chain alkyl groups containing 2 to 7 carbon atoms, these compounds making up 30 mole % or more of the total composition, and at least one compound selected from at least one of the group consisting of 4-alkylbenzoic acid-4'-(4"-alkylphenyl)-2'-chlorophenyl ester having the general formula: ##STR2## wherein R and R' are normal chain alkyl groups containing 2 to 8 carbon atoms and the group consisting of 4-alkoxybonzoic acid-4'-(4"-alkylphenyl)-2'-chlorophenyl ester having the general formula: ##STR3## wherein R and R' are normal chain alkyl groups containing 2 to 8 carbon atoms. This composition not only have a wide nematic temperature range assuring operation at a low temperature of less than -20.degree. C. but also have a low viscosity and excellent response.

REFERENCES:
patent: 4065489 (1977-12-01), Steinstrasser et al.
patent: 4073742 (1978-02-01), Erdmann et al.
patent: 4138359 (1979-02-01), Mizukuchi
patent: 4216109 (1980-08-01), Mizukuchi
patent: 4229315 (1980-10-01), Krause et al.
patent: 4290905 (1981-09-01), Kanbe
Levine, A. et al., Mol. Cryst. Liq. Cryst., vol. 43, pp. 183-187, (1977).

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