Patent ID: 6861107

Claim:
A liquid-crystalline medium, which comprises: one or more compounds of the formula I one or more compounds of the formula II wherein R 1 and R 2 are each, independently of one another, alkyl having from 1 to 12 carbon atoms, in which one or two non-adjacent CH 2 groups are optionally replaced by —O—, —CO—, —OCO— or —COO— in such a way that O atoms are not linked directly to one another, and and one or more polymerizable compounds selected from those of the formula I* P 1 -Sp 1 -X 1 -A 1 -(Z 1 -A 2 ) n -R I* in which R is H, F, Cl, CN, SCN, SF 5 H, NO 2 , straight-chain or branched alkyl having from 1 to 12 carbon atoms, in which one or two non-adjacent CH 2 groups are optionally replaced by —O—, —S—, —CO—, —OCO—, —COO—, —O—COO—, —S—CO—, —CO—S—, —CH═CH— or —C≡C— in such a way that O and/or S atoms are not linked directly to one another, or R is —X 2 -Sp 2-P 2 , P 1 and P 2 are each, independently of one another, acrylate, methacrylate or epoxy, Sp 1 and Sp 2 are each, independently of one another, a spacer group or a single bond, X 1 and X 2 are each, independently of one another, —O—, —S—, —OCH 2 —, —CH 2 O—, —CO—, —COO—, —OCO—, —OCO—O—, —CO—NR 0 —, —NR 0 —CO—, —OCH 2 —, —CH 2 O—, —SCH 2 —, —CH 2 S—, —CH═CH—COO—, —OOC—CH═CH— or a single bond. A 1 and A 2 are each, independently of one another, 1,4-phenylene, in which one or more CH groups are optionally replaced by N; 1,4-cyclohexylene, in which one or more non-adjacent CH 2 groups are optionally replaced by O and/or S; 1,4-cyclohexenylene; 1,4-bicyclo[2.2.2]octylene; piperidine-1,4-diyl; naphthalene-2,6-diyl; decahydronaphthalene-2,6-diyl; 1,2,3,4-tetrahydronaphthalene-2,6-diyl; or indane-2,5-diyl; where all these groups may be unsubstituted or monosubstituted or polysubstituted by L, L is F, Cl, CN or alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl or alkylcarbonyloxy having from 1 to 7 carbon atoms, in which one or more H atoms are optionally replaced by F or Cl, Z 1 is —O—, —S—, —CO—, —COO—, —OCO—, —O—COO—, —OCH 2 —, —CH 2 O—, —SCH 2 —, —CH 2 S—, —CF 2 O—, —OCF 2 —, —CF 2 S—, —SCF 2 —, —CH 2 CH 2 —, —CF 2 CH 2 —, —CH 2 CF 2 —, —CF 2 CF 2 —, —CH═CH—, —CF═CF—, —C≡C—, —CH═CH—COO—, —OCO—CH═CH—, CR 0 R 00 or a single bond, R 0 and R 00 are each, independently of one another, H or alkyl having from 1 to 4 carbon atoms, and n is 0, 1 or 2.