Patent ID: 7923079
Filing Date: 2011-04-12
Classification: C07D,C09K

Abstract:
1. A liquid-crystalline medium of positive dielectric anisotropy based on a mixture of compounds comprising: one or more compounds of the formula I in which R ring A denotes a ring system of the formulae Z X denotes F, Cl, CN, SF L m 1; and one or more compounds of formulae XIV and XV: in which R X rings B and C, independently of one another, are each 1,4-phenylene which is substituted by 0, 1 or 2 fluorine, wherein at least one of the 1,4-phenylene rings is mono- or polysubstituted by fluorine; and further comprising one or more compounds of formulae Z-1 to Z-9 and/or one or more compounds of formulae II, III, IV, V and VI wherein R R alkyl, alkyl* denote an unsubstituted n-alkyl radical having 1 to 7 C atoms, alkenyl denotes an unsubstituted alkenyl radical having 2-7 C atoms, X Z Y r denotes 0 or 1, and t denotes 0, 1 or 2.