Liquid crystal dielectric

Details Liquid crystal dielectric Liquid crystal dielectric

1986-11-24

1989-04-04

Gron, Teddy S.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

2522995, 350350R, 544242, 544295, 544298, 544315, 544316, 544318, 544333, 544334, 544335, 546187, 546205, 546206, 546207, 549273, 549291, 549292, 549293, 549356, 549370, 549414, 549415, 549416, 549417, 549419, 549420, 549423, 549425, 549426, 549427, 549428, G02F 113, C09K 1934, C07D30930, C07D30904, C07D30908, C07D40702, C07D40506, C07D405112

Patent

active

048184314

ABSTRACT:
New tetrahydropyran derivatives of the formula I ##STR1## in which G is H.sub.2 or .dbd.O, R.sup.1 and R.sup.2 are each an alkyl group having 1-10 C atoms, it also being possible for one or two CH.sub.2 groups to be replaced by O atoms, or are F, Cl, Br or CN, R.sup.2 is also H, A.sup.1 and A.sup.2 are each 1,4-phenylene, 1,4-cyclohexylene, 1,3-dioxane-2,5-diyl, piperidine-1,4-diyl, 1,4-bicyclo[2.2.2]octylene or pyrimidine-2,5-diyl groups which are unsubstituted or substituted by 1-4 F atoms, Z.sup.1 and Z.sup.2 are each --CO--O--, --O--CO--, --CH.sub.2 CH.sub.2 --, --OCH.sub.2 --, --CH.sub.2 O--, or a single bond, m and n are each 0, 1, 2 or 3, but (m+n) is at least 1 and at most 3, it being possible, when m is 2 or 3, for the group A.sup.1 and, when n is 2 or 3, for the groups A.sup.2 each to be identical or different from one another, and the acid addition salts of those among these compounds which are basic, are suitable for use as components in liquid-crystal dielectrics.

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Kohne, B., Symthesen und Mesomorphe Eigenschaften Neuartiger, Thermotroper Flussigkristalle, Dissertation, Technische Universitat, Berlin, pp. 83-84 (1981).
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