Liquid crystal mixtures

Details Liquid crystal mixtures Liquid crystal mixtures

1981-07-01

1983-07-26

Gron, Teddy S.

Compositions

Liquid crystal compositions

Containing pleochroic dye

25229961, 25229963, 260206, 260186, 350349, C09K 334, G02F 113

Patent

active

043953506

ABSTRACT:
Liquid crystal mixtures containing a coloring substance which comprise about 5 to about 40 weight % of trans-p-[5-(4-alkylcyclohexyl)-2-pyrimidinyl]benzonitriles, about 10 to about 60 weight % of trans-4-alkylcyclohexane carboxylic acid phenyl esters and about 0.1 to about 15 weight % of one or more coloring substances of the formula ##STR1## wherein m stands for the number 1 and X is alkoxy and Y is nitro; or m stands for the number 1 or 2; and X is p-alkoxyphenyl and Y is nitro or dialkylamino, or X is alkoxy and Y is -p-nitrophenyl or -(dialkylamino)phenyl; or m stands for the number 2, and X is alkoxy and Y is alkoxy, nitro or dialkylamino, or both X and Y are dialkylamino; and wherein the alkoxy denotes a straight-chain group containing 1 to 12 carbon atoms and the alkyl groups in the dialkylamino each denote a straight-chain alkyl group containing 1 to 4 carbon atoms are described.

REFERENCES:
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patent: 4179395 (1979-12-01), Cole, Jr. et al.
patent: 4273929 (1981-06-01), Doller et al.
patent: 4304683 (1981-12-01), Morinaka et al.
patent: 4350603 (1982-09-01), Aftercut et al.
patent: 4359398 (1982-11-01), Cole, Jr. et al.
patent: 4363743 (1982-12-01), Moeller et al.
Cognard, J., et al., Mol. Cryst. Liq. Cryst., vol. 68, pp. 207-229 (1981).
Blinov, L. M., et al., J. de Physique, Coll. Cl, Suppl., No. 3, Tome 36, pp. 61-69-76 (1975).
Jones, F. et al., Mol Cryst. Liq. Cryst., vol. 60, pp. 99-110 (1980).
Cognard, J., et al., Mol. Cryst. Liq. Cryst., vol. 70, pp. 1-19 (1981).
Cox, R. J., Mol. Cryst. Liq. Cryst., vol. 55, pp. 1-32 (1979).
Bloom, A., et al., Mol. Cryst. Liq. Cryst., vol. 40, pp. 213-221 (1977).
Bloom, A., et al., Mol. Cryst. Liq. Cryst., vol. 41 (Letters), pp. 1-4 (1977).

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