Patent ID: 8940184
Filing Date: 2015-01-27
Classification: C09K

Abstract:
1. A liquid crystal medium comprising: a polymerisable component A) comprising one or more polymerisable compounds, and a liquid-crystalline component B) comprising one or more low-molecular-weight compounds that are monomeric and unpolymerisable, wherein component A) comprises one or more polymerisable compounds selected from formula I in which the individual radicals have the following meanings: R a , R b each, independently of one another, denote P-Sp-, H, F, Cl, Br, I, —CN, —NO 2 —, —NCO, —NCS, —OCN, —SCN, SF 5 , straight-chain or branched alkyl having 1 to 25 C atoms, in which, in addition, one or more non-adjacent CH 2 groups are each optionally replaced, independently of one another, by arylene, —C(R 0 )═C(R 00 )—, —C≡C—, —N(R 0 )—, —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 are each optionally replaced by F, Cl, Br, I, CN or P-Sp-, or aryl or heteroaryl which optionally contain two or more fused rings and which are optionally mono- or polysubstituted by L, where at least one of the radicals R a and R b 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, A 1 , A 2 each, independently of one another, denote an aromatic, hetero aromatic, alicyclic or heterocyclic group, which optionally contains fused rings and which is optionally mono- or polysubstituted by L, L on each occurrence, identically or differently, denotes P-Sp-, H, OH, CH 2 OH, halogen, SF 5 , NO 2 , a carbon group or hydrocarbon group, Z 1 denotes —O—, —S—, —CO—, —CO—O—, O—CO—, —O—CO—O—, —OCH 2 — —CH 2 O—, —SCH 2 , —CH 2 S—, —CF 2 O—, —OCF 2 —, —CF 2 S—, —SCF 2 —, —(CH 2 ) n —, —CH 2 CH 2 —, —CH 2 CF 2 —, —(CF 2 ) n , CH═CH—, —CF═CF—, —CH═CF—, —CF═CH—, —C≡C—, —CH═CH—CO—O—, —O—CO—CH═CH—, —CH 2 —CH 2 —CO—O—, —O—CO—CH 2 —CH 2 —, —C(R 0 R 00 )—, —C(R y R z )— or a single bond, R 0 , R 00 each, independently of one another and identically or differently on each occurrence, denote H or alkyl having 1 to 12 C atoms, R y , R z each, independently of one another, denote H, F, CH 3 or CF 3 , m denotes 0, 1, 2, 3 or 4, n on each occurrence, identically or differently, denotes 1, 2, 3 or 4, p, q each, independently of one another, denote 0 or 1, where p+q≧1.