Liquid crystal with high negative dielectric anisotropy and mixt

Details Liquid crystal with high negative dielectric anisotropy and mixt Liquid crystal with high negative dielectric anisotropy and mixt

1978-06-06

1979-11-06

Padgett, Benjamin R.

Compositions

Liquid crystal compositions

252408, 260465D, 350346, 350350, 560 21, 560 23, 560 65, C09K 334, C02F 113, C07C 6988, C07C 7946, C07C12164, C07C12175

Patent

active

041735455

ABSTRACT:
A liquid crystal composition with high negative dielectric anisotropy, which is capable of exhibiting a high dynamic light scattering effect and of inducing similar characteristics into mixtures of the liquid crystal and another nematic liquid crystal and which derives an advantage from a larger mesomorphic temperature range, which comprises at least one compound of the formula: ##STR1## wherein R represents NO.sub.2, bromine or cyano; R.sub.1 is an alkyl or alkoxy group and R.sub.2 is an alkyl group.

REFERENCES:
patent: 3915883 (1975-10-01), Van Meter et al.
patent: 3953491 (1976-04-01), Steinstrasser et al.
patent: 4001137 (1977-01-01), Steinstrasser
patent: 4009934 (1977-03-01), Goodwin et al.
patent: 4020002 (1977-04-01), Oh
Steinstrasser, R. Angew. Chem. Internat. Edit., vol. 11, No. 7, pp 633-634 (1972).
Steinstrasser, R., Z. Naturforsch, vol. 27b, pp. 774-779 (1972).

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