Patent ID: 6083423
Filing Date: 2000-07-04
Classification: C09K

Abstract:
A nematic liquid crystal mixture having a positive dielectric anisotropy .DELTA..epsilon. of at least +4 and a birefringence .DELTA..epsilon. of at least 0.13, wherein the mixture comprises one or more components of the formula I: ##STR69## wherein L.sup.1 is F, L.sup.2, Y and Z are each independently of one another H or F, one of Q.sup.1 and Q.sup.2 is 1,4-phenylene, 3-fluoro-1,4-phenylene or 3,5-difluoro-1,4-phenylene and the other of Q.sup.1 or Q.sup.2 is --CH.sub.2 CH.sub.2 --, --CH.sub.2 CH.sub.2 CH.sub.2 CH.sub.2 -- or a single bond, R is alkyl, alkoxy, oxaalkyl, dioxaalkyl, alkenyl, fluoroalkyl or chloroalkyl of 1-10 carbon atoms, r is 0 or 1 and X is F, Cl or a fluorinated and/or chlorinated alkyl, alkenyl or alkoxy group of 1 or 2 carbon atoms.