Liquid crystal composition containing a pleochroic azo type comp

Details Liquid crystal composition containing a pleochroic azo type comp Liquid crystal composition containing a pleochroic azo type comp

1988-06-02

1990-09-25

Thexton, Matthew A.

Compositions

Liquid crystal compositions

Containing pleochroic dye

350349, 534577, 534752, C09K 1900

Patent

active

049591720

ABSTRACT:
A liquid crystal composition suitable for a guest-host liquid crystal device and the composition comprises a solution of a liquid crystal substance and a pleochroic dye which comprises at least one azo type compound having the formula (I), ##STR1## wherein R.sup.1 represents a hydrogen atom, an alkyl group or an alkoxy group each of which may be substituted by an alkoxy or an aryl group; a cyclohexyl group which may be substituted by an alkyl group; or --COOR.sup.3 (wherein R.sup.3 represents an alkyl group which may be substituted by an alkoxy group, a cyclohexyl group which may be substituted by an alkyl group, or an aryl group which may be substituted by an alkoxy or an alkyl group);

REFERENCES:
patent: 4668050 (1987-05-01), Aoki et al.

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