Patent ID: 7316830
Filing Date: 2008-01-08
Classification: C09K

Abstract:
1. A liquid-crystalline medium comprising: at least one phenol ester of formula I in which R is H, an alkyl radical or alkenyl radical having up to 15 carbon atoms which is unsubstituted, monosubstituted by CN or CF A  b) is a 1,4-phenylene radical, in which one or two CH groups are each optionally replaced by N,  c) is a piperidine-1,4-diyl, 1,4-bicyclo[2.2.2]octylene, naphthalene-2,6-diyl, decahydronaphthalene-2,6-diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl radical,  where the radicals a), b) and c) are in each case unsubstituted, monosubstituted or polysubstituted by halogen atoms, Z Y is F, Cl, or a monohalogenated or polyhalogenated alkyl, alkenyl, alkenyloxy or alkoxy radical having up to 5 carbon atoms, L is H or F, and m is 0, 1 or 2; and  one or more compounds of formulae RII to RVI wherein R b is 0, 1 or 2, Y Alkyl* is a straight-chain alkyl radical having up to 9 carbon atoms, and Alkenyl or Alkenyl* is, in each case independently of one another, an alkenyl radical having up to 9 carbon atoms.