Three ring dioxane liquid crystalline compounds

Details Three ring dioxane liquid crystalline compounds Three ring dioxane liquid crystalline compounds

1980-12-24

1982-04-20

Gron, Teddy S.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229963, 2522995, 2603407, 350350R, 350350S, C07D31904, G02F 113, C09K 334

Patent

active

043258301

ABSTRACT:
Disclosed are compounds of the formula: ##STR1## where R is alkyl or alkoxy and R.sup.1 is alkyl, alkoxy, cyano or nitro and where ring N is a benzene or saturated cyclohexane ring. The compounds of the invention are compatible and useful in admixture with the general classes of cyanophenyl dioxane and/or cyclohexyl dioxane type liquid crystalline compounds to provide a broad nematic temperature range mixture with advantageous electrooptical and other properties. Novel admixtures including preferably at least about 30 weight percent of the compounds of the invention are disclosed. Preferred admixtures also include at least about 30 weight percent of cyanophenyl dioxanes and at least about 20 weight percent of cyclohexyl dioxanes.

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Sorkin; H., Mol. Cryst. Liq. Cryst. (Letters), vol. 56, pp. 279-281, (1980).
Bata; L., Advances In Liquid Crystal Research and Applications, vol. 2, Proceedings of the 3rd Liq. Cryst. Conf. of Socialist Countries, Budapest, Aug. 21-31, 1979, Pergamon Press, (1981), pp. 997-1002.

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