Patent ID: 8795552

Claim:
A liquid-crystalline medium having positive dielectric anisotropy, comprising: one or more compounds of formula I and one or more compounds selected from formulas IA to IE in which X 0 denotes F, Cl, CN, SF 5 , SCN, NCS, a halogenated alkyl radical, a halogenated alkenyl radical, a halogenated alkoxy radical or a halogenated alkenyloxy radical, having in each case up to 6 C atoms, L 1 to L 5 each, independently of one another, denote H or F, R 1 and R 2 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, where, in addition, one or more CH 2 groups in these radicals are each optionally replaced by —O—, —S—, —C≡C—, —CF 2 O—, —OCF 2 — —OC—O— or —O—CO— in such a way that O atoms are not linked directly to one another, R 0 denotes H, 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, where, in addition, one or more CH 2 groups in these radicals are each optionally replaced by —O—, —S—, —C≡C—, —CF 2 O—, —OCF 2 — —OC—O— or —O—CO— in such a way that O atoms are not linked directly to one another, A 1 a) denote a 1,4-cyclohexenylene or 1,4-cyclohexylene radical, in which one or two non-adjacent CH 2 groups may be replaced by —O— or —S—, or b) denote a 1,4-phenylene radical, in which one or two CH groups are each optionally replaced by N, or c) denote a radical from the group consisting of piperidine-1,4-diyl-, 1,4-bicyclo[2.2.2]octylene-, naphthalene-2,6-diyl, decahydronaphthalene-2,6-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl, phenanthrene-2,7-diyl and fluorene-2,7-diyl, where the radicals a), b) and c) may be mono- or polysubstituted by halogen atoms, Z 1 denotes —CO—O—, —O—CO—, —CF 2 O—, —OCF 2 —, —CH 2 O—, —OCH 2 —, —CH 2 CH 2 —, —(CH 2 ) 4 —, —C 2 F 4 —, —CH 2 CF 2 —, —CF 2 CH 2 —, —CF═CF—, —CH═CF—, —CF═CH—, —CH═CH—, —C≡C— or a single bond, m denotes 0, 1 or 2, p denotes 1 or 2, q denotes 0 or 1, v denotes 1 to 6, and X 1 and X 2 each independently of one another denote, F, Cl, CHF 2 , CF 3 , OCHF 2 or OCF 3 , and wherein the amount of compounds of formulas IA, IB, IC, ID and IE in said medium is 2-30% by weight based on the total medium.