4-Substituted phenyl 4-(5n-alkyl-1,3-dioxan-2-yl)benzoates

Details 4-Substituted phenyl 4-(5n-alkyl-1,3-dioxan-2-yl)benzoates 4-Substituted phenyl 4-(5n-alkyl-1,3-dioxan-2-yl)benzoates

1981-06-29

1982-10-26

Gron, Teddy S.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

2522995, 350350R, G02F 113, C09K 334

Patent

active

043561047

ABSTRACT:
Disclosed are compounds of the formula: ##STR1## wherein R.sub.1 is an alkyl group and R.sub.2 is an alkyl, alkoxy, acyloxy, alkyl carbonato group having 1 to 10 carbon atoms, CN or NO.sub.2. The compounds of the invention are useful as liquid crystal materials in electrooptical displays.
Also disclosed are novel admixtures of the above benzoate compounds with cyanophenyl dioxane compounds, these admixtures being especially useful for multiplexed electrooptical displays. Preferred admixtures include at least about 40 weight percent of the above benzoate compounds and at least about 40 weight percent of cyanophenyl dioxane compounds with other liquid crystalline compounds such as phenyl cyclohexanecarboxylate, biphenyl and/or phenyl benzoate liquid crystalline compounds also being present in amounts up to about 20 weight percent.

REFERENCES:
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patent: 4001137 (1977-01-01), Steinstrasser
patent: 4011173 (1977-03-01), Steinstrasser
patent: 4200580 (1980-04-01), Hsu
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patent: 4298528 (1981-11-01), Sethofer
patent: 4313878 (1982-02-01), Hsu
patent: 4322354 (1982-03-01), Sorkin
patent: 4323471 (1982-04-01), Sethofer
patent: 4323472 (1982-04-01), Sethofer
patent: 4335012 (1982-06-01), Sorkin
Sorkin, H., Mol. Cryst. Liq. Cryst., vol. 56, (Letters), pp. 279-281, (1980).

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