Liquid-crystalline medium
AssigneeMerck Patent GmbH
InventorsBernhard Rieger, Reinhard Hittich, Eike Poetsch, David Coates, Herbert Plach
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Abstract
The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, characterized in that it contains one or more compounds of the general formula I ##STR1## in which Hal is fluorine or chlorine and R is alkyl, oxaalkyl, fluoroalkyl or alkenyl, in each case having up to 7 carbon atoms.
Claims8
Liquid-crystalline medium based on a mixture of polar compounds having positive dielectric anisotropy, characterized in that it contains one or more compounds of the general formula I ##STR72## and additionally one or more compounds selected from the group consisting of formulae V-VIII ##STR73## in which the individual radicals are as defined below:
- R is alkyl, oxaalkyl, fluoroalkyl, or alkenyl, in each case having up to 7 carbon atoms;
- X is F, Cl, CF.sub.3, OCF.sub.3, or OCHF.sub.2 ;
- Y.sup.1 and Y.sup.2 are, in each case, F;
- r is 0 or 1;
- and
- Hal is fluorine or chlorine.
Dependencies are inferred from the claim text.