Liquid crystalline 5-alkyl-2 (4-acyloxy-phenyl)-pyrimidine

Details Liquid crystalline 5-alkyl-2 (4-acyloxy-phenyl)-pyrimidine Liquid crystalline 5-alkyl-2 (4-acyloxy-phenyl)-pyrimidine

1980-08-20

1982-01-19

Gron, Teddy S.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

2522995, 25229963, 350350R, 350350S, 544335, C09K 334, G02F 113, C07D23932

Patent

active

043116108

ABSTRACT:
The invention relates to the application of nematic liquid-crystalline substances in electro-optical device elements for the display of numbers, symbols and images.
Such nematic liquid crystals having low melting points and extremely high temperatures of transparency.
The nematic liquid-crystalline substances are 5-alkyl-2-[4-acyloxyphenyl]-pyrimidines having the general formula ##STR1## wherein ##STR2## R.sup.1 =C.sub.n H.sub.2n+1, C.sub.n H.sub.2n+1 O, C.sub.n H.sub.2n+1 OCOO, C.sub.n H.sub.2n+1 COO, C.sub.n H.sub.2n+1 S, F, Cl, Br, NO.sub.2, CN CF.sub.3

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Boller, A., et al., Mol. Cryst. Liq. Cryst., vol. 42, No. 3, pp. 215-231 (1977).
Nash, J. A., et al., Mol. Cryst. Liq. Cryst., vol. 25, pp. 299-321 (1974).
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