Liquid crystal-base composition for an electro-optical device

Details Liquid crystal-base composition for an electro-optical device Liquid crystal-base composition for an electro-optical device

1981-02-24

1982-11-09

Gron, Teddy S.

Compositions

Liquid crystal compositions

Containing pleochroic dye

350349, C09K 334, G02F 113

Patent

active

043583920

ABSTRACT:
The liquid crystal-base composition for an electro-optical device contains an anthraquinone pleochroic coloring agent of formula (I) as defined in claim 1, that is to say, with in particular at least one hydroxy or amino group in position 1 and a heterocyclic side chain which is directly substituted in position 2, or 2 and 6, or 3, or 3 and 7.
The compounds (I) have a high order parameter and are stable, thereby imparting to the compositions the properties required for use thereof for example in a display device. ##STR1##

REFERENCES:
patent: 4232950 (1980-11-01), Bemham
patent: 4273929 (1981-06-01), Doller et al.
patent: 4288147 (1981-09-01), Koch
patent: 4299720 (1981-11-01), Osman et al.
patent: 4304683 (1981-12-01), Morinaka et al.
Cognard, J., et al., Mol. Cryst. Liq. Cryst., vol. 70, pp. 1-19, (1981).

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