Liquid-crystalline composition of matter

A liquid-crystalline composition of matter comprising, as compoents,

• A) at least one compound of the formula I
• Z1—Y1—A1—Y3—M—Y4—A2—Y2—Z2 I,
• where the variables, independently of one another, have the following meanings:
• Z1 and Z2 are each a reactive group,
• Y1 to Y4 are each a chemical single bond, oxygen, sulfur, —O—CO—, —CO—O—, —O—CO—O—, —CO—NR—, —NR—CO—, —O—CO—NR—, —NR—CO—O— or —NR—CO—NR—,
• R is hydrogen or C1-C4-alkyl,
• A1 and A2 are each a spacer having from 1 to 30 carbon atoms, in which the carbon chain may be monosubstituted or polysubstituted by methyl, fluorine, chlorine or bromine and/or interrupted by ether oxygen, thioether sulfur or non-adjacent imino or C1-C4-alkylimino groups, and
• M is a mesogenic group,
• B) at least one reactive compound selected from the group consisting of the subgroups
• b5) vinylaromatics or vinylheteroaromatics, and
• b6) compounds of the general formula II
• CH2═CH—NR2—R1 II,
• where:
• R2 is hydrogen, C1-C4-alkyl or, together with R3, a saturated or unsaturated C3-, C4- or C5-alkylene bridge, in which up to two CH2 groups may be replaced by NH, N(C1-C4-alkyl), N(C6-C10-aryl) or oxygen and up to two CH groups may be replaced by N, and
• R3 is hydrogen, C1-C4-alkyl or a radical which, together with R2, forms a saturated or unsaturated C3- , C4- or C5-alkylene bridge, in which up to two CH2 groups may be replaced by NH, N(C1-C4-alkyl), N(C6-C10-aryl) or oxygen and up to two CH groups may be replaced by N, and
• C) if desired, further additives.