Liquid crystal materials containing pleochroic anthraquinone dye

Details Liquid crystal materials containing pleochroic anthraquinone dye Liquid crystal materials containing pleochroic anthraquinone dye

1983-04-06

1985-03-26

Gron, Teddy S.

Compositions

Radioactive compositions

Nuclear reactor fuel

2522991, 25229963, 260378, 260380, 260383, 350346, 350350R, C09K 334, C02F 113

Patent

active

045069573

ABSTRACT:
A material suitable for a guest-host liquid crystal device comprises a solution of a liquid crystal material and a pleochroic dye characterized in that the dye comprises at least one anthraquinone compound free from water-solubilizing and ionic substituents and having the formula: ##STR1## wherein each of R and R.sup.1 independently represents an n-alkyl group having from 4 to 7 carbon atoms inclusive and wherein each of R.sup.2 and R.sup.3 is independently selected from hydrogen and alkyl groups having from 1 to 4 carbon atoms inclusive.

REFERENCES:
patent: 4232950 (1980-11-01), Benham
patent: 4363743 (1982-12-01), Moeller et al.
patent: 4391489 (1983-07-01), Harrison et al.
patent: 4391754 (1983-07-01), Rehfrew

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