Patent ID: 7854970

Claim:
A liquid-crystalline medium based on a mixture of polar compounds, comprising A) at least one compound of formula I in which R 11 and R 12 each, independently of one another, denote an alkyl or 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 are optionally replaced by —O—, —S—, —C≡C—, —CF 2 O—, —OC—O— or —O—CO— in such a way that O atoms are not linked directly to one another, each, independently of one another, denote a denotes 0, 1 or 2, and B1) one or more compounds of formulae IIA and/or IIB in which R 2 denotes an alkyl or 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 are optionally replaced by —O—, —S—, —C≡C—, —CF 2 O—, —OC—O— or —O—CO— in such a way that O atoms are not linked directly to one another, Z 2 denotes a single bond, —CH═CH—, —CH 2 O—, —OCH 2 —, —CF 2 O—, —OCF 2 —, —O—, —CH 2 — or —CH 2 CH 2 —, p denotes 1 or 2, L 1 , L 2 , L 3 and L 4 each, independently of one another, denote F, Cl, OCF 3 , CF 3 , CH 3 , CH 2 F, or CHF 2 , and v denotes 1 to 6, or B2) one or more compounds of formula III in which R 31 and R 32 each, independently of one another, denote an alkyl or 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 are optionally replaced by —O—, —S—, —C≡C—, —OC—O— or —O—CO— in such a way that O atoms are not linked directly to one another, each, independently of one another, denote r denotes 0, 1 or 2, and Z 31 and Z 32 each, independently of one another, denote a single bond, —Ch 2 CH 2 —, —C≡C—, —CH═CH—, —CF 2 O—, —OCF 2 —, —CF═CF—, —CF═CH—, —CH═CF—, —Ch 2 CF 2 —, —CF 2 CH 2 —, —COO—, —OCO—, —Ch 2 O—, —OCH 2 —, or —(CH 2 ) 4 —.