| abstract |
Nematic liquid-crystal mixture with positive dielectic anisotropy and high resistivity, characterized in that it is based on the following components: a) at least 10% by weight of a liquid-crystalline component B consisting of one or more compounds having a dielectric anisotropy of more than +1.5 and containing one or more compounds selected from the group consisting of compounds of the formulas IIa to IIf, wherein R n-alkyl or n-alkenyl having up to 9 C atoms, X is cyano, -NCS, F, Cl, -CF 3 , -CHF 2 , -OCF 3 , -OCHF 2 , -OCF 2 CF 2 H or - OC 2 F 5 , and the rings A 1 , A 2 and A 3 are each independently of one another 1,4-phenylene, 2- or 3-fluoro-1,4-phenylene, 2,3-difluoro-1,4-phenylene, trans-1,4-cyclohexylene or 1,4-cyclohexenylene, b) 10 to 90 wt .-% of a liquid-crystalline component A consisting of one or more compounds with egg ner dielectric anisotropy of -1.5 to +1.5 of the general formula I. wherein R 1 and R 2 are each independently n-alkyl, ω-fluoroalkyl or n-alkenyl having up to 9 C atoms, the rings A 1 , ... |