Liquid crystal materials containing pleochroic anthraquinone dye

Compositions – Radioactive compositions – Nuclear reactor fuel

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2522991, 260378, 260380, G02F 113, C09K 334

Patent

active

043914896

ABSTRACT:
A material suitable for a guest-host liquid crystal device comprises a solution of a liquid crystal material and a pleochroic dye wherein the pleochroic dye comprises at least one compound having a formula: ##STR1## wherein one of X and Y is OH and the other is NHR wherein R is H or lower alkyl; each of R.sub.1 and R.sub.2 independently represents alkyl, aryl, aralkyl, alkoxy or --NR.sub.3 R.sub.4 wherein each of R.sub.3 and R.sub.4 is independently H or lower alkyl, provided that R.sub.2 is always adjacent to an OH group.

REFERENCES:
patent: 4232949 (1980-11-01), Huffman
patent: 4232950 (1980-11-01), Benham
patent: 4273929 (1981-06-01), Boller et al.
patent: 4299720 (1981-11-01), Osman et al.
patent: 4304683 (1981-12-01), Morinaka et al.
patent: 4360447 (1982-11-01), Morinaka et al.
patent: 4363743 (1982-12-01), Moeller et al.
Abstracts of the Eighth International Liquid Crystal Conference, I-23 & I-24, Kyoto, Japan, (Jun. 30-Jul. 4, 1980).
Gognard, J. et al., Mol. Cryst. Liq. Cryst., vol. 70, pp. 1-19 (1981).
Saeva, F. D., Xerox Discl. J., vol. 1, Nos. 9/10, pp. 61-62 (1976).

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