Nematic liquid crystals of 5-cyano-2-[4-acyloxyphenyl]-pyrimidin

Details Nematic liquid crystals of 5-cyano-2-[4-acyloxyphenyl]-pyrimidin Nematic liquid crystals of 5-cyano-2-[4-acyloxyphenyl]-pyrimidin

1980-04-30

1982-11-09

Gron, Teddy S.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

2522995, 25229963, 544242, 544335, C09K 334, G02F 113, C07D23932

Patent

active

043583938

ABSTRACT:
Nematic liquid crystals are employed in electro-optical devices for the modulation of the transmittant or incident light and for the black and white or colored rendition of numerals, symbols and pictures.
The object of the invention is the use of nematic liquid crystals having a high positive dielectric anisotropy, a low threshold and operating voltage and high clear points and a process for making these compounds.
It was found that as liquid crystals for electro-optical devices mixtures are useful which, as an essential component, contain one or several compounds from the class of 5-cyano-2-[4-acyloxyphenyl]-pyrimidines of the formula ##STR1## wherein R.sup.1 is ##STR2## C.sub.5 H.sub.11 -- or C.sub.n H.sub.2n+1 O-- R.sup.2 is C.sub.n H.sub.2n+1 ; C.sub.n H.sub.2n+1 O; C.sub.n H.sub.2n+1 S; F; Cl; Br; CF.sub.3 ; C.sub.n H.sub.2n+1 COO; C.sub.n H.sub.2n+1 OCOO; CN; NO.sub.2 ; C.sub.n H.sub.2n+1 NH; or C.sub.n H.sub.2n+1 (CH.sub.3)N, n is 1 to 10, and

REFERENCES:
patent: 3947375 (1976-03-01), Gray et al.
patent: 3951846 (1976-04-01), Gavrilovic
patent: 3952046 (1976-04-01), Scherrer et al.
patent: 3997536 (1976-12-01), Boller et al.
patent: 4062798 (1977-12-01), Boller et al.
patent: 4112239 (1978-09-01), DuBois et al.
patent: 4113647 (1978-09-01), Coates et al.
patent: 4136053 (1979-01-01), Steinstrasser
patent: 4200580 (1980-04-01), Hsu
patent: 4229315 (1980-10-01), Krause et al.
patent: 4256656 (1981-03-01), Beguin et al.
patent: 4311610 (1982-01-01), Zaschke et al.
Boller, A. et al.; Mol. Cryst. Liq. Cryst., vol. 42, No. 1-3, pp. 215-231 (1977).
Nash, J. A. et al., Mol. Cryst. Liq. Cryst., vol. 25, pp. 299-321 (1974).
Zaschke, H., J. Prakt. Chemie., vol. 317, No. 4, pp. 617-630 (1975).
Schubert, H. et al.; J. Prakt. Chemie, vol. 312, pp. 494-506 (1970).
Demus, D., "Nonemissive Electrooptic Displays", pp. 83-119 (1975).
Zaschke, H., Advances in Liquid Crystal Research and Applications, Bata, Lajos, Pergamon Press, Oxford, pp. 1059-1074 (1980), Proceedings of the Third Liq. Cryst. Conf. of Socialist Countries, Budapest, 27-31, Aug. 1979.

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