Polymerisable compounds and the use thereof in liquid-crystal media and liquid-crystal displays

摘要

The present invention relates to polymerisable compounds, to processes and intermediates for the preparation thereof, to the use thereof for optical, electro-optical and electronic purposes, in particular in liquid-crystal (LC) media and LC displays having a polymer-stabilised blue phase, and in LC media for LC displays of the PS or PSA (“polymer sustained” or “polymer sustained alignment”) type, and to LC media and LC displays comprising these compounds.

主权项

1. A compound of formula I
Pa-(Spa)s1-A2-Q1-A1-Q2-A3-(Spb)s2-Pb  I in which Pa, Pb each, independently of one another, denote an acrylate group, Spa, Spb each, independently of one another, denote a spacer group, s1, s2 each, independently of one another, denote 0 or 1, Q1, Q2 each, independently of one another, denote —CF2O— or —OCF2—, A1 denotes  in which the individual rings are optionally mono- or polysubstituted by L, A2, A3 each, independently of one another, denote
a) trans-1,4-cyclohexylene, 1,4-cyclohexenylene or 1,4′-bicyclohexylene, in which optionally one or more non-adjacent CH2 groups are replaced by —O— and/or —S—, and in which one or more H atoms are optionally replaced by F,b) 1,4-phenylene or 1,3-phenylene, in which optionally one or two CH groups are replaced by N and in which one or more H atoms are optionally replaced by L,c) tetrahydropyran-2,5-diyl, 1,3-dioxane-2,5-diyl, tetrahydrofuran-2,5-diyl, cyclobut-1,3-diyl, piperidine-1,4-diyl, thiophene-2,5-diyl or selenophene-2,5-diyl, each of which is optionally mono- or polysubstituted by L,d) a saturated, partially unsaturated or fully unsaturated, and optionally substituted, polycyclic radical having 5 to 20 cyclic C atoms, one or more of which are optionally replaced by heteroatoms, and wherein one of the following provisos A, B or C is satisfied A) one or more of the radicals A2 and A3 are 1,3-phenylene, in which one or two CH groups are optionally replaced by N and in which optionally one or more H atoms are optionally replaced by L, or B) one or more of the radicals A2 and A3 are a saturated, partially unsaturated or fully unsaturated, and optionally substituted, polycyclic radical having 5 to 20 cyclic C atoms, one or more of which may also be replaced by heteroatoms, or C) A1 denotes in which the individual rings are optionally mono- or polysubstituted by L, L on each occurrence, identically or differently, denotes F, Cl, CN, SCN, SF5 or a straight-chain or branched, in each case optionally fluorinated alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy having 1 to 12 C atoms.