Biphenyl derivative compounds and liquid crystal materials and d

Details Biphenyl derivative compounds and liquid crystal materials and d Biphenyl derivative compounds and liquid crystal materials and d

1976-04-16

1977-07-12

Padgett, Benjamin R.

Compositions

Radioactive compositions

Nuclear reactor fuel

252299, 252408, 260465C, 260465D, 260465F, 260465G, 260465K, G02F 113, C09K 334, C07C12164, C07C12160, C07C12166

Patent

active

040350568

ABSTRACT:
A family of new compounds suitable for adding to cyanobiphenyls and other liquid crystal compounds to give mixtures having extended liquid crystal temperature ranges is characterised by the formula ##STR1## or, a simple substituted derivative thereof, where A is (CH.sub.2).sub.n, (CH.sub.2).sub.n O O(CH.sub.2).sub.n, n being an integer in the range 1-4, either X is hydrogen or an alkyl, alkoxy or alkanoyloxy group and Y is a cyano group or Y is hydrogen or an alkyl, alkoxy or alkanoyloxy group and X is a cyano group.
The mixtures so produced may be used in known kinds of liquid crystal electro-optic devices.

REFERENCES:
patent: 3925238 (1975-12-01), Gavrilovic
patent: 3947375 (1976-03-01), Gray et al.
patent: 3951846 (1976-04-01), Gavrilovic
patent: 3952046 (1976-04-01), Scherrer et al.
patent: 3954653 (1976-05-01), Yamazaki
patent: 3974087 (1976-08-01), Gray et al.

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