Liquid crystal medium containing polymerisable compounds

A liquid crystal (LC) medium comprising

• a polymerisable component A) which comprises:
• one or more first polymerisable compounds comprising a polymerisable group and a bi- or polycylic hydrocarbon group, selected from the following formulae I1 to I4:
• wherein
• P is a polymerisable group,
• Sp is a spacer group or a single bond,
• W11, W12 and W13 are independently of each other H, F or C1-C12-alkyl, and
• the cycloalkyl ring system in each of formulae I1 to I4 is optionally substituted with one or more groups L, where L is F, Cl, —CN, —NO2—NCO, —NCS, —OCN, —SCN, —C(═O)N(Rx)2, —C(═O)Y1, —C(═O)Rx, —N(Rx)2, optionally substituted silyl, optionally substituted aryl or heteroaryl having 5 to 20 ring atoms, or straight-chain or branched alkyl having 1 to 25, in which, in addition, one or more non-adjacent CH2 groups may each be replaced, independently of one another, by —C(R0)═C(R00)—, —C≡C—, —N(R0)—, —O—, —S—, —CO—, —CO—O—, —O—CO—, —O—CO—O— in such a way that O and/or S atoms are not linked directly to one another, and in which, in addition, one or more H atoms may be replaced by F, Cl, —CN,
• Rx is H, F, Cl, CN, or straight chain, branched or cyclic alkyl having 1 to 25 C atoms, wherein one or more non-adjacent CH2-groups are optionally replaced by —O—, —S—, —CO—, —CO—O—, —O—CO—, —O—CO—O— in such a manner that O- and/or S-atoms are not directly connected with each other, and wherein one or more H atoms are each optionally replaced by F or Cl,
• R0, R00 are H or alkyl having 1 to 20 C atoms, and
• Y1 is halogen;
• one or more second polymerisable compounds comprising a polymerisable group and a straight-chain, branched or monocyclic hydrocarbon group, selected from compounds of the formula II:
• P-Sp-G2 II
• wherein P and Sp independently have the meanings given above, and G2 is a straight-chain, branched or monocyclic alkyl group with 1 to 20 C atoms that is optionally mono-, poly- or perfluorinated and is optionally substituted by one or more groups L independently as defined above, and wherein one or more CH2-groups in the alkyl group are optionally replaced by —O—, —CO—, —O—CO— or —CO—O— such that O-atoms are not directly adjacent to one another;
• and
• a liquid-cystalline component B) which comprises one or more compounds selected from formula A and B:
• in which the individual radicals have, independently of each other and on each occurrence identically or differently, the following meanings:
• each, independently of one another, and on each occurrence, identically or differently, are:
• R21, R31 each, independently of one another, are alkyl, alkoxy, oxaalkyl or alkoxyalkyl having 1 to 9 C atoms or alkenyl or alkenyloxy having 2 to 9 C atoms, all of which are optionally fluorinated,
• X0 is F, Cl, halogenated alkyl or alkoxy having 1 to 6 C atoms or halogenated alkenyl or alkenyloxy having 2 to 6 C atoms,
• z31 is —CH2CH2—, —CF2CF2—, —COO—, trans-CH═CH—, trans-CF═CF—, —CH2O— or a single bond,
• L21, L22, L31, L32 each, independently of one another, are H or F, and
• g is 0, 1, 2 or 3.