Liquid crystalline compositions

Details Liquid crystalline compositions Liquid crystalline compositions

1979-01-24

1980-10-14

Gron, Teddy S.

Compositions

Liquid crystal compositions

252408, 260465D, 260465E, 350350R, 560 1, 560 11, 560 17, 560 43, 560 61, 560 73, 560106, 560125, 560126, 560179, G02F 113, C09K 334, C07C 6974, C07C 6976, C07C12146, C07C12160

Patent

active

042280290

ABSTRACT:
Liquid crystalline compositions, especially for displays with a twisted nematic phase, comprising at least one compound of the formula ##STR1## wherein X=H, --CHO or --CH.sub.3, R.sup.1 =C.sub.1 --C.sub.10 alkyl, R.sup.2 is a monovalent organic group, for example, --CN; and Y is a single bond or one of the groups --COO-- or ##STR2## The compositions show a high positive dielectric anisotropy (.DELTA..epsilon.), a high .DELTA.n, and a low viscosity, and the mixture system may comprise relatively few components.

REFERENCES:
patent: 3876286 (1975-04-01), Deutscher et al.
patent: 3947375 (1976-03-01), Gray et al.
patent: 3983049 (1976-09-01), Aftergut et al.
patent: 4002670 (1977-01-01), Steinstrasser
patent: 4003844 (1977-01-01), Sorkin
patent: 4011173 (1977-03-01), Steinstrasser
patent: 4058478 (1977-11-01), Boller et al.
patent: 4122026 (1978-10-01), Osman
patent: 4130502 (1978-12-01), Eidenschink et al.
patent: 4154697 (1979-05-01), Eidenschink et al.
Osman, M., Z. Naturforsch, vol. 34b, pp. 1092-1095, (1979).

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