Dark colored composition based on liquid crystals

Details Dark colored composition based on liquid crystals Dark colored composition based on liquid crystals

1983-06-28

1984-10-23

Gron, Teddy S.

Compositions

Liquid crystal compositions

Containing pleochroic dye

350349, G02F 113, C09K 334

Patent

active

044787391

ABSTRACT:
The present invention relates to a dark colored composition based on liquid crystals, especially for use in a dichroic display cell. It comprises a mixture of liquid crystals and of dyes respectively red, yellow and blue. The red dye is the 4,4'-bis(p-dimethylamino-phenylazo)-2-methyl-azobenzene; the yellow dye is the 4,4'-bis(p-methoxy-phenylazo)-2-methyl-azobenzene; and the blue dye in an anthraquinonic dye of formula (III), ##STR1## in which A is ##STR2## and B is H or ##STR3## where R and R', indentical or different, are a lower alkyl or alkoxy group, one of the A and B being H when the other is not H.

REFERENCES:
patent: 3833287 (1974-09-01), Taylor et al.
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: 4273929 (1981-06-01), Boller et al.
patent: 4304683 (1981-12-01), Morinaka et al.
patent: 4308161 (1981-12-01), Aftergut et al.
patent: 4308163 (1981-12-01), Aftergut et al.
patent: 4359398 (1982-11-01), Cole, Jr. et al.
patent: 4363743 (1982-12-01), Moeller et al.
patent: 4376715 (1983-03-01), Cognard et al.
patent: 4395350 (1980-07-01), Boller et al.
Cognard, J., et al., Mol. Cryst. Liq. Cryst., vol. 68, pp. 207-229, vol. 70, pp. 1-19, (1981).
Cox, R. J., Mol. Cryst. Liq. Cryst., vol. 55, pp. 1-32, (1979).
Jones, F., et al., Mol. Cryst. Liq. Cryst., vol. 60, pp. 99-110, (1980).

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