Patent ID: 8697200
Filing Date: 2014-04-15
Classification: C09K,G02F

Abstract:
1. A liquid-crystal (LC) medium comprising: one or more compounds of the formula I in which the individual radicals have the following meanings: R a and R b R a and R b in formula I denote identical or different radicals P-Sp-, P on each occurrence, identically or differently, denotes a polymerisable group selected from vinyloxy, acrylate, methacrylate, fluoroacrylate, chloroacrylate, oxetane and epoxide groups, and Sp on each occurrence, identically or differently, denotes a spacer group or a single bond; and one or more compounds of the formulae CY and/or PY: in which the individual radicals have the following meanings: a denotes 1 or 2, b denotes 0 or 1, denotes R 1 and R 2 each, independently of one another, denote alkyl having 1 to 12 C atoms, in which, in addition, one or two non-adjacent CH 2 groups may be replaced by —O—, —CH═CH—, —CO—, —OCO— or —COO— in such a way that O atoms are not linked directly to one another, Z x denotes —CH═CH—, —CH 2 O—, —OCH 2 —, —CF 2 O—, —OCF 2 —, —O—, —CH 2 —, —CH 2 CH 2 — or a single bond, and L 1-4 each, independently of one another, denote F, Cl, OCF 3 , CF 3 , CH 3 , CH 2 F, or CHF 2 ; with the proviso that the following compounds are excluded: in which Sp denotes a spacer group which is not a single bond, and P has the meaning indicated above.