Positive dielectric anisotropy liquid crystal compositions

Details Positive dielectric anisotropy liquid crystal compositions Positive dielectric anisotropy liquid crystal compositions

1975-04-30

1976-10-05

Padgett, Benjamin R.

Compositions

Liquid crystal compositions

350160LC, C09K 334, G02F 113

Patent

active

039843440

ABSTRACT:
A liquid crystal composition of highly positive dielectric anisotropy comprises a mixture of a substantial fraction of substituted cyanophenylbenzoates and at least one (non-nitrile bearing) substituted phenyl benzoate, which may be a single and/or double ester. The large proportion of cyanophenylbenzoates causes the high positive dielectric anisotropy, and the use of a plurality of compounds reduces the melting point by eutectic action, also increasing the mesophase operating temperature range. The use of solely esters ensures high chemical stability, and the mixture is colorless.

REFERENCES:
patent: 3770653 (1973-11-01), Katagiri et al.
patent: 3876286 (1975-04-01), Deutscher et al.
patent: 3915883 (1975-10-01), Van Meter et al.
patent: 3919105 (1975-11-01), Katagiri et al.

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