Patent ID: 8687259

Claim:
Polymerisable LC material comprising from 1 to 45% of one or more compounds of formula I wherein U 1,2 are independently of each other selected from including their mirror images, wherein the rings U 1 and U 2 are each bonded to the central bitolane group via the axial bond, and one or two non-adjacent CH 2 groups in these rings are optionally replaced by O and/or S, and the rings U 1 and U 2 are optionally substituted by one or more groups L, Q 1,2 are independently of each other CH or SiH, Q 3 is C or Si, A 1-4 are independently of each other selected from non-aromatic carbocylic or heterocyclic groups and aromatic or heteroaromatic groups, which are optionally substituted by one or more groups R 5 , and wherein each of -(A 1 -Z 1 ) m â€”U 1 â€”(Z 2 -A 2 ) n - and -(A 3 -Z 3 ) o â€”U 2 â€”(Z 4 -A 4 ) p - does not contain more aromatic groups than non-aromatic groups, Z 1-4 are independently of each other â€”Oâ€”, â€”Sâ€”, â€”COâ€”, â€”COOâ€”, â€”OCOâ€”, â€”Oâ€”COOâ€”, â€”COâ€”NR 0 â€”, â€”NR 0 â€”COâ€”, â€”NR 0 â€”COâ€”NR 0 â€”, â€”OCH 2 â€”, â€”CH 2 Oâ€”, â€”SCH 2 â€”, â€”CH 2 Sâ€”, â€”CF 2 Oâ€”, â€”OCF 2 â€”, â€”CF 2 Sâ€”, â€”SCF 2 â€”, â€”CH 2 CH 2 â€”, â€”(CH 2 ) 3 â€”, â€”(CH 2 ) 4 â€”, â€”CF 2 CH 2 â€”, â€”CH 2 CF 2 â€”, â€”CF 2 CF 2 â€”, â€”CHâ•CHâ€”, â€”CY 1 â•CY 2 â€”, â€”CHâ•Nâ€”, â€”Nâ•CHâ€”, â€”Nâ•Nâ€”, â€”CHâ•CR 0 â€”, â€”Câ‰¡Câ€”, â€”CHâ•CHâ€”COOâ€”, â€”OCOâ€”CHâ•CHâ€”, CR 0 R 00 or a single bond, Y 1,2 are independently of each other H, F, Cl, CN or R 0 , R 0 and R 00 are independently of each other H or alkyl with 1 to 12 C-atoms, m and n are independently of each other 0, 1, 2, 3 or 4, o and p are independently of each other 0, 1, 2, 3 or 4, R 1-5 are independently of each other identical or different groups selected from H, halogen, â€”CN, â€”NC, â€”NCO, â€”NCS, â€”OCN, â€”SCN, â€”C(â•O)NR 0 R 00 , â€”C(â•O)X 0 , â€”C(â•O)R 0 , â€”NH 2 , â€”NR 0 R 00 , â€”SH, â€”SR 0 , â€”SO 3 H, â€”SO 2 R 0 , â€”OH, â€”NO 2 , â€”CF 3 , â€”SF 5 , P-Sp-, optionally substituted silyl, or carbyl or hydrocarbyl with 1 to 40 C atoms that is optionally substituted and optionally comprises one or more hetero atoms, or denote P or P-Sp-, or are substituted by P or P-Sp-, wherein the compounds comprise at least one group R 1-4 that denotes P or P-Sp- or is substituted by P or P-Sp-, P is a polymerisable group, Sp is a spacer group or a single bond, and further comprising from 50% to 99% of polymerisable mesogenic or liquid crystalline compounds different from formula I.