Cyano-substituted biphenyl compounds and liquid crystalline diel

Details Cyano-substituted biphenyl compounds and liquid crystalline diel Cyano-substituted biphenyl compounds and liquid crystalline diel

1977-03-25

1978-02-14

Padgett, Benjamin R.

Compositions

Liquid crystal compositions

260465D, 350350, C09K 334, G02F 113, C07C12160, C07C12164

Patent

active

040737420

ABSTRACT:
Biphenyl derivatives of the formula: ##STR1## wherein X is --CO--O-- or --O--CO--, R.sub.1 and R.sub.4 are alkyl of 1 to 10 carbon atoms, and one of R.sub.2 and R.sub.3 is CN and the other is H, are useful for lowering the dielectric anisotropy of liquid crystalline dielectrics.

REFERENCES:
patent: 3772389 (1973-11-01), Lowrance, Jr.
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: 3953491 (1976-04-01), Steinstrasser et al.
patent: 3971824 (1976-07-01), Van Meter et al.
patent: 4017416 (1977-04-01), Inukai et al.
patent: 4029594 (1977-06-01), Gavrilovic et al.
patent: 4035056 (1977-07-01), Coates et al.
Liquid Crystals & Plastic Crystals, vol. 1, Gray, G. W., et al., John Wiley & Sons, Inc., N.Y., pp. 103-152, (1974).

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