Patent ID: 11920075
Assignee: MERCK PATENT GMBH
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  G | IPC C  G

Claim 23:
24. An LC medium, having positive dielectric anisotropy and comprising:
one or more compounds of formula IA and one or more compounds of formula IB, in which R1 and R2 n each case, independently of one another, denote alkyl, alkoxy, oxaalkyl or fluoroalkyl, in each case having 1 to 7 C atoms,
wherein the LC medium comprises no compounds of the formulae IA and IB in which
one or both radicals R1 or R2 contain a C═C double bond
and wherein of the one or more compounds of formula IA at least one of formula IA1a and/or formula IA1b is present, , and of the one or more compounds of formula IB at least a compound of formula IB1a is present, one or more compounds of formulae II and III, in which the individual radicals, in each case independently of one another and identically or differently on each occurrence, have the following meaning, R0 unsubstituted or halogenated alkyl or alkoxy having 1 to 15 C atoms, where, in addition, one or more CH2 groups in these radicals may in each case be replaced, independently of one another, by —CF2O—,, , —O—, —CO—O—or —O—CO— in such a way that O atoms are not linked directly to one another,
X0 F, Cl, halogenated alkyl, halogenated alkoxy or halogenated alkenyloxy, in each case having up to 6 C atoms,
Y1-6 H or F, and
Y0 H or CH3; and
one or more compounds of formula X, in which
R0 unsubstituted or halogenated alkyl or alkoxy having 1 to 15 C atoms, where, in addition, one or more CH2 groups in these radicals may in each case be replaced, independently of one another, by —CF2O—,, , —O—, —CO—O—or —O—CO— in such a way that O atoms are not linked directly to one another,
X0 F, Cl, halogenated alkyl, halogenated alkoxy or halogenated alkenyloxy, in each case having up to 6 C atoms, and
Y1-4 H or F.