18-04-2013 дата публикации
Номер: US20130093975A1
The present invention relates to polymerisable compounds, to processes and intermediates for the preparation thereof, and to the use thereof for optical, electro-optical and electronic purposes, in particular in liquid-crystal (LC) media and LC displays, especially in LC displays of the PS (“polymer sustained”) or PSA (“polymer sustained alignment”) type. 1. A polymerizable compound of the formula I{'br': None, 'sub': s1', 'm', 's2, 'sup': 1', '1', '2', '2', '3, 'P-(Sp)-A-Z-A(-Z-A)-(Sp)—P\u2003\u2003I'}in which the individual radicals have the following meanings:P on each occurrence, identically or differently, denotes a polymerisable group,Sp on each occurrence, identically or differently, denotes a spacer group,s1, s2 each, independently of one another, denote 0 or 1,{'sup': 1', '2', '3, 'A, A, Aeach, independently of one another, denote 1,4-phenylene, naphthalene-1,4-diyl or naphthalene-2,6-diyl, where, in addition, one or more CH groups in these groups may be replaced by N, phenanthrene-2,7-diyl, anthracene-2,7-diyl, 9,10-dihydrophenanthrene-2,7-diyl, 9H-fluorene-2,7-diyl, 9,9-dimethylfluorene-2,7-diyl or dibenzofuran-3,7-diyl, where all these groups may be unsubstituted or mono- or polysubstituted by L,'}m denotes 0, 1 or 2,{'sub': 2', '2', '2', '2, 'sup': x', '1', 'x', 'x, 'L on each occurrence, identically or differently, denotes P—, P-Sp-, OH, CHOH, halogen, —CN, —NO, —NCO, —NCS, —OCN, —SCN, —C(═O)N(R), —C(═O)Y, —C(═O)R, —N(R), optionally substituted silyl or an optionally substituted carbon group or hydrocarbon group,'}{'sup': 'x', 'sub': '2', 'Rdenotes P—, P-Sp-, H, halogen, straight-chain, branched or cyclic alkyl having 1 to 25, preferably 1 to 12, C atoms, in which, in addition, one or more non-adjacent CHgroups may be replaced by —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, P— or P-Sp-,'}{'sup': '1', 'Ydenotes ...
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