Liquid crystal compositions containing pleochroic dye

Details Liquid crystal compositions containing pleochroic dye Liquid crystal compositions containing pleochroic dye

Filed on

1979-02-23

Date issued

1980-11-11

Examiner

Gron, Teddy S.

Patent Class

Compositions

SubClass

Radioactive compositions

SubSubClass

Nuclear reactor fuel

Other Related Categories

252299, 252408, 350350R, C09K 334, G02F 113

Type

Patent

Status

active

Patent number

042329493

Description

ABSTRACT:
Liquid crystal compositions containing pleochroic dyes. The pleochroic dyes are substituted anthraquinone dyes containing at least one carbocyclic or heterocyclic group linked to the anthraquinone moiety through a sulfur atom. The dyes are used in guest-host combinations with nematic liquid crystal compositions having positive dielectric anisotropy. Electro-optic devices containing these guest-host combinations are disclosed.

REFERENCES:
patent: 3833287 (1974-09-01), Taylor et al.
patent: 3960750 (1976-06-01), Moriyama et al.
patent: 3960751 (1976-06-01), Moriyama et al.
patent: 4105299 (1978-08-01), Huffman et al.
patent: 4128497 (1978-12-01), Cole, Jr. et al.
patent: 4130502 (1978-12-01), Eidenschink et al.
patent: 4137193 (1979-01-01), Osman et al.
patent: 4143947 (1979-03-01), Aftercut et al.
patent: 4145114 (1979-03-01), Coates et al.
patent: 4153343 (1979-05-01), Bloom et al.
patent: 4154697 (1979-05-01), Eidenschink et al.
Constant, J., et al.; "Photostable Anthraquinone Pleochroic Dyes," presented at 7th Intern'l Liquid Crystal Conf., Bordeaux, France (7/1978).
Bloom, A., et al., Mol. Cryst. Liq. Cryst., vol. 41(Letters), pp. 1-4 (1977).
Bloom, A., et al., Mol. Cryst. Liq. Cryst., vol. 40, pp. 213-221 (1977).
White, D. L., et al.; J. Appl. Phys., vol 45, No. 11 pp. 4718-4723 (1974).

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