Liquid crystalline nematic substances

Details Liquid crystalline nematic substances Liquid crystalline nematic substances

1982-08-04

1984-12-04

Gron, Teddy S.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

2522995, 25229963, 350350R, 350350S, 549369, 549373, 549374, 549375, G02F 113, C09K 334, C07D31906, C07D31904

Patent

active

044863322

ABSTRACT:
The invention relates to liquid crystal nematic substances based on new derivatives of 1,3-dioxanes in electro-optical components, which are used, for instance, as displays in electronic clocks and computer systems.
The subject of the invention is nematic liquid crystal substances with favorable properties concerning melting and clear temperatures, stability against thermal stress and electrical fields, low viscosity and low threshold voltage.
It was found that liquid crystal 2,5-di-substituted cyclohexyl derivatives of 1,3 dioxanes, having the general formula ##STR1## 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 COO; CN; NO.sub.2 ; F; Cl; Br

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patent: 4344856 (1982-08-01), Demus et al.
patent: 4348324 (1982-09-01), Demus et al.
patent: 4356104 (1982-10-01), Hsu
Gray, G. W. et al., Mol. Cryst. Liq. Cryst., vol. 53, pp. 147-166, (1979).
Osman, M. M., et al., Mol. Cryst. Liq. Cryst., vol. 56, (Letters), pp. 105-109, (1979).

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