Anthraquinone dyestuffs for liquid crystal dielectrics

Details Anthraquinone dyestuffs for liquid crystal dielectrics Anthraquinone dyestuffs for liquid crystal dielectrics

1983-12-23

1985-07-30

Gron, Teddy S.

Compositions

Liquid crystal compositions

Containing pleochroic dye

350349, 260380, 260381, 260383, 260384, C09K 334, G02F 113, C09B 102, C09B 104, C09B 150, G09F 935

Patent

active

045320691

ABSTRACT:
New anthraquinone dyestuffs of the general formula I ##STR1## wherein Hal is a halogen atom and the two radicals R are each H or NH.sub.2 and the alkyl group has 1-8 C atoms, exhibit a high order parameter and are suitable for use as components of liquid-crystal dielectrics.

REFERENCES:
patent: 4232950 (1980-11-01), Benham
patent: 4273929 (1981-06-01), Boller et al.
patent: 4304683 (1981-12-01), Morinafa et al.
patent: 4360447 (1982-11-01), Morinafa et al.
patent: 4363743 (1982-12-01), Moeller et al.
patent: 4376715 (1983-03-01), Cognard et al.
Cognard, J., et al., Mol. Cryst. Liq. Cryst., vol. 70, pp. 1-19, (1981).
CAS, Registry Handbook, Number Section, 1965-1971, RNS 5521-35-7 and 5521-37-9, and RN 4702-66-3.
Chem. Abstracts 64. 12 582c, (1966).
Helv. Chim. Acta 59. 2999, (1976).

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