Red perylene dichroic dye containing liquid crystal formulations

Details Red perylene dichroic dye containing liquid crystal formulations Red perylene dichroic dye containing liquid crystal formulations

1980-12-16

1983-03-29

Gron, Teddy S.

Compositions

Liquid crystal compositions

Containing pleochroic dye

2522995, 350349, C09K 334, G02F 113

Patent

active

043783023

ABSTRACT:
Liquid crystal compositions having guest perylene-based dichroic dyes dissolved therein. The perylene dichroic dyes have symmetrically-disposed substituents which are preferably a group forming with the 3,4 and 9, 10 carbons, respectively, a 5 or 6 membered cyclic ring which is substituted by, or fused to, a phenyl ring. The perylene-based dyes of the invention can be used alone or with other compatible dyes as guest dyes to form various colors for coloring the host liquid crystal compositions.

REFERENCES:
patent: 3960753 (1976-06-01), Larrabee
patent: 4032219 (1977-06-01), Constant et al.
patent: 4128497 (1978-12-01), Cole, Jr. et al.
patent: 4145114 (1979-03-01), Coates et al.
patent: 4211473 (1980-07-01), Shanks
patent: 4288147 (1981-09-01), Koch
patent: 4299720 (1981-11-01), Osman
patent: 4304683 (1981-12-01), Morinaka et al.
Cox, R. J., Mol. Cryst. Liq. Cryst., vol. 55, pp. 1-32 (1979).
Bloom, A. et al., Mol. Cryst. Liq. Cryst., vol. 40, pp. 213-221, (1977).
Bloom, A., et al. Mol. Cryst. Liq. Cryst., vol. 41, (Lett.), pp. 1-4, (1977).

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