Patent ID: 6858267

Claim:
A liquid-crystalline medium comprising: one or more compounds of the formula (I): in which R is an alkyl radical, alkoxy radical or alkenyl radical having from 1 to 7 or 2 to 7 carbon atoms respectively, in which one or more CH 2 groups are optionally replaced by —O— in such a way that oxygen atoms are not adjacent; and one or more compounds of the formulae (IIa) and (IIc) to (IIo): in which R are independent of one another and are an alkyl, alkoxy or alkenyl radical having from 1 to 7 or 2 to 7 carbon atoms respectively, in which one or more CH 2 groups are optionally replaced by —O— in such a way that oxygen atoms are not adjacent, and X is —F, —Cl, —OCF 3 , —OCHF 2 , —OCH 2 F or —CF 3 .