Polymerisable compounds and the use thereof in liquid-crystal displays

A mixture comprising one or more compounds of formula I and one or more compounds of formula II

• wherein the individual radicals, independently of each other and on each occurrence identically or differently, have the following meanings
• R P, P-Sp-, H, F, Cl, Br, I, —CN, —NO2, —NCO, —NCS, —OCN, —SCN, SF5 or straight-chain or branched alkyl having 1 to 25 C atoms, 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(R00)—, —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 each be replaced by F, Cl, Br, I, CN, P or P-Sp-,
• P a polymerizable group,
• Sp a spacer group or a single bond,
• A1, A3 straight-chain, branched or cyclic alkylene with 1 to 20 C atoms, wherein one or more non-adjacent CH2-groups are optionally replaced by —CR0═CR00—, —C≡C—, —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,
• A2, A4 arylene or heteroarylene having 5 to 20 ring atoms, which optionally contains fused rings, which are optionally substituted by one or more groups L or P-Sp-,
• Z1-4 —O—, —S—, —CO—, —CO—O—, —O—CO—, —O—CO—O—, —OCH2—, —CH2O—, —SCH2—, —CH2S—, —CF2O—, —OCF2—, —CF2S—, —SCF2—, —(CH2)n1—, —CF2CH2—, —CH2CF2—, —(CF2)n1—, —CH═CH—, —CF═CF—, —CH═CF—, —CF═CH—, —C≡C—, —CH═CH—CO—O—, —O—CO—CH═CH—, —CH2—CH2—CO—O—, —O—CO—CH2—CH2—, —CR0R00—, or a single bond,
• R0, R00 H or alkyl having 1 to 12 C atoms,
• L F, Cl, —CN, P-Sp- 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 —CR0═CR00—, —C≡C—, —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 P-Sp-, F or Cl,
• R1, R2 straight-chain or branched alkyl with 1 to 6 C atoms,
• R3 OH or morpholine-1-yl,
• a, b, c, d 0, 1, 2 or 3, with a+c≥1,
• g 1, 2, 3 or 4,
• n1 1, 2, 3 or 4,
• r 0, 1, 2, 3 or 4,
• p 1, 2 or 3, with p+r≤5,
• and wherein in formula II in case of g≥2 the groups (P-Sp)p and —C(═O)—CR1R2R3 are linked to different terminal benzene rings, and in case of g≥3 all benzene rings are connected with each other via para-positions.