Azine liquid crystal compounds for use in light-control devices

Details Azine liquid crystal compounds for use in light-control devices Azine liquid crystal compounds for use in light-control devices

1979-04-03

1980-04-08

Gron, Teddy S.

Compositions

Radioactive compositions

Nuclear reactor fuel

252299, 252408, 260465R, 260465E, 260465K, 260566B, 350346, 350349, C02F 113, C09K 334, C07C11910, C07C12164

Patent

active

041969758

ABSTRACT:
A light-control device includes a liquid crystal material sandwiched between a pair of planar, light-transmitting members. The liquid crystal material particularly includes an asymmetrical azine compound having the general formula: ##STR1## wherein R.sub.1 and R.sub.2 are different para-substituents selected from the group comprising cyano, halogen, alkyl, and substituted alkyl radicals in which the alkyl radical has from one to nine carbon atoms, and wherein X and Y are selected from the group comprising hydrogen and methyl radicals.

REFERENCES:
patent: 2440070 (1948-04-01), Blout et al.
patent: 3947375 (1976-03-01), Gray et al.
patent: 4001137 (1977-01-01), Steinstrasser
patent: 4038200 (1977-07-01), Jones et al.
Kast, Landolt-Bornstein, 6th Edition, vol. 2, Part 2, Springer-Verlag, Berlin, pp. 266-267, 308 (1960).
Usol'Tseva, V.A., et al. Russ. Chem. Rev., vol. 32, No. 9, pp. 495-507 (1963).
Foote, H. W., "Liquid Crystals", International Critical Tables", pp. 314-320 (1926).
Gray, G. W., et al. "Liquid Crystals & Plastic Crystals", vol. 1 , John Wiley & Sons, Inc., (1974).

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