Patent ID: 6217953
Filing Date: 2001-04-17
Classification: C09K

Abstract:
A liquid-crystalline medium based on a mixture of polar compounds of negative dielectric anisotropy, which comprises at least one compound of the formula I1 and/or I2 ##STR17##and at least one compound of the formula I3 ##STR18##in whichR.sup.11, R.sup.2 and R.sup.3 are each, independently of one another, an unsubstituted alkyl or alkenyl radical having 1 to 12 carbon atoms, in which one or more non-adjacent CH.sub.2 groups are optionally replaced by a radical selected from the group consisting of --O--, --S-- and --C.tbd.C--,R.sup.12 is C.sub.s H.sub.2s+1, --O--C(CH.sub.3).dbd.CH.sub.2 or--O--(CH.sub.2).sub.b CH.dbd.CH.sub.2Q is --O-- or a single bond,Z is --C.sub.2 H.sub.4 --, --CH.dbd.CH-- or a single bond,s, t, and u are each, independently of one another, from 1 to 6,o and p are each, independently of one another, 1 or 2 andb is 0, 1, 2, or 3.