| 主权项 |
1. A liquid crystal display which is a PS (polymer stabilized) or PSA (polymer sustained alignment) liquid crystal display which comprises a compound of the formula I: in which the individual radicals have the following meanings: W denotes —C(RcRd)—, —CH2CH2—, —CH2—O—, —O—, —CO—, —CO—O—, —S— or —N(Rc)—, Rc, Rd each, independently of one another, denote P-Sp-, H, F, Cl, Br, I, —CN, —NO2, —NCO, —NCS, —OCN, —SCN, SF5, 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 arylene, —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, Br, I, CN or P-Sp-, or aryl or heteroaryl, preferably having 2 to 25 C atoms, which may also contain two or more fused rings and which is optionally mono- or polysubstituted by L, Ra, Rb each, independently of one another, have one of the meanings indicated for Rc, where at least one of the radicals Ra and Rb denotes or contains a group P-Sp-, P on each occurrence, identically or differently, denotes a polymerisable group, Sp on each occurrence, identically or differently, denotes a spacer group or a single bond, A1, A2 each, independently of one another, denote an aromatic, heteroaromatic, alicyclic or heterocyclic group, preferably having 4 to 25 C atoms, which may also contain fused rings and which is optionally mono- or polysubstituted by L, L on each occurrence, identically or differently, denotes P-Sp-, H, OH, CH2OH, halogen, SFS, NO2, a carbon group or hydrocarbon group, Z1, Z2 each, independently of one another, denote —O—, —S—, —CO—, —CO—O—, —O—CO—, —O—CO—O—, —OCH2—, —CH2O—, —SCH2—, —CH2S—, —CF2O—, —OCF2—, —CF2S—, —SCF2—, —(CH2)n, CF2CH2—, —CH2CF2—, —(CF2)n, —CH═CH—, —CF═CF—, —CH═CF—, —CF═CH—, —C≡C—, —CH═CH—COO—, —O—CO—CH═CH—, —CH2—CH2—CO—O—, —O—CO—CH2—CH2—, —C(R0R00)—, —C(RyRz)— or a single bond, R0, R00 each, independently of one another and identically or differently on each occurrence, denote H or alkyl having 1 to 12 C atoms, Ry, Rz each, independently of one another, denote H, F, CH3 or CF3, n on each occurrence, identically or differently, denotes 1, 2, 3 or 4, p, q each, independently of one another, denote 0, 1, 2 or 3, r on each occurrence, identically or differently, denotes 0, 1, 2 or 3. |
