Patent ID: 7438956

Claim:
A liquid-crystalline medium of positive dielectric anisotropy based on a mixture of compounds, comprising one or more compounds of formula I in which R 1 and R 2 each, independently of one another, denote an alkenyl radical having up to 15 C atoms which is unsubstituted, monosubstituted by CN or CF 3 , or at least monosubstituted by halogen, in which, one or more CH 2 groups may be replaced by —O—, —S—, —C≡C—, —CH═CH—, —(CO)O— or —O(CO)— in such a way that O atoms are not linked directly to one another, and one or more compounds of formulae K-1 to K-11: in which R 0 denotes n-alkyl, oxaalkyl, fluoroalkyl or alkenyl, each having up to 9 C atoms.