Patent ID: 7081280
Filing Date: 2006-07-25
Classification: C09K

Abstract:
1. Liquid-crystalline medium comprising a mixture of polar compounds of positive dielectric anisotropy, wherein the medium comprises: one or more compounds of formula I in which R is H, an alkyl or alkenyl radical having 1 to 15 carbon atoms which is unsubstituted, monosubstituted by CN or CF  —CO—, —CO—O—, —O—CO— or —O—CO—O in such a way that O atoms are not linked directly to one another,  is a trans-1,4-cyclohexylene ring, in which one or two CH Y is halogenated alkyl, halogenated alkenyl, halogenated alkoxy or halogenated alkenyloxy having 1 to 6 carbon atoms, Z is —CH n is 1 or 2; and one or more dioxane compounds of the following formula wherein R X