Liquid crystal mixture

Details Liquid crystal mixture Liquid crystal mixture

1982-09-30

1985-09-24

Gron, Teddy S.

Compositions

Liquid crystal compositions

Containing pleochroic dye

2522992, 2522993, 2522995, 350349, C09K 334, G02F 113

Patent

active

045432015

ABSTRACT:
In a liquid crystal mixture comprising a nematic liquid crystal having negative dielectric anisotropy, an optically active substance such as cholesteric or chiral nematic liquid crystal, a dichroic dye and an ionic substance, the present invention is characterized by use of 3,5-dinitrobenzoic acid having the following structural formula as the ionic substance: ##STR1##

REFERENCES:
patent: 3920576 (1975-11-01), Jones, Jr. et al.
patent: 4155872 (1979-05-01), Shigehiro et al.
patent: 4281903 (1981-08-01), Gharadjedaghi
patent: 4366080 (1982-12-01), Mizunoya et al.
patent: 4400059 (1983-08-01), Nagae et al.
patent: 4405209 (1983-09-01), Funada et al.
patent: 4482473 (1984-11-01), Yamanashi et al.
Gharadjedaghi, F., Mol. Cryst. Liq. Cryst., vol. 68, pp. 127-135 (Jun. 1981).

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