Dichroic dye and liquid crystalline composition for color displa

Details Dichroic dye and liquid crystalline composition for color displa Dichroic dye and liquid crystalline composition for color displa

1984-03-07

1985-11-12

Gron, Teddy S.

Compositions

Liquid crystal compositions

Containing pleochroic dye

350349, 548149, 548223, G02F 113, C09K 334, C09B 524

Patent

active

045526842

ABSTRACT:
An anthraquinonic dye of the formula ##STR1## is provided. When used as dichloric dyes in liquid crystalline color display elements, these dyes (1) have sufficient coloring ability in small amounts, (2) have a high dichloric ratio, (3) are fully soluble in liquid crystals, and (4) have excellent durability, are stable and do not degrade the performance of a display device upon long-term use.

REFERENCES:
patent: 4299720 (1981-11-01), Osman et al.
patent: 4356102 (1982-10-01), Aftergut et al.
Aftergut, S., et al., Mol. Cryst. Liq. Cryst., vol. 78, No. 1-4, pp. 271-277 (1981).

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