Patent ID: 6358574
Filing Date: 2002-03-19
Classification: C08G,C09K

Abstract:
A crosslinkable LC organosilicon compound containing units of the general formula 1[RbMescSiO(4âˆ’bâˆ’c)/2]â€ƒâ€ƒ(1) in whichR are C1-C4-alkyl radicals, Mes is at least one group of the general formula 2, and optionally, further Mes group(s) of the general formula 3, b has the value 0, 1 or 2, and c has the value 0, 1, 2, 3 or 4, with the proviso that the sum of the values of b and c is a maximum of 4, where the Mes groups of the general formulae 2 and 3 exhibit the following structures:â€”(CH2)pâ€”(O)qâ€”Aâ€”[Bâ€”A]râ€”Eâ€”Fâ€”VNâ€ƒâ€ƒ(2) â€”(CH2)mâ€”(O)nâ€”(A)tâ€”Qâ€”Xâ€ƒâ€ƒ(3) in whichA is a divalent radical from the group consisting of a 1,4-cyclohexylene ring, a 4,4â€²-bicyclohexylene radical, a 1,4-phenylene ring, a 2,6-naphthylene radical, a 2,7-naphthylene radical, a 2,5-(1,3-dioxanylene) ring and a pyrimidinyl radical, Q is a radical from the group consisting of â€”COOâ€”, â€”OCOâ€”, â€”Oâ€”, a chemical bond and â€”Oâ€”(C&boxH;O)â€”Oâ€”, X is a cholesteryl, dihydrocholesteryl, doristeryl, isosorbidyl, isomannidyl or cholic acid radical or an unsubstituted or substituted radical selected from the group consisting of 1,4-phenylene, 4,4â€²-biphenylyl, 1,4-cyclohexylene, 4,4â€²-bicyclohexylene, 4,4â€²-cyclohexylenephenylene, 2,5-(1,3-dioxanylene) and pyrimidinyl radicals, where the substituent can be a C1- to C5-alkoxy radical, a C1- to C5-alkyl radical, a cyano radical, a chlorine radical or a nitro radical, B is a radical from the group consisting of a chemical bond, â€”Oâ€”CH2â€”, â€”CH2Oâ€”, â€”CH2â€”CH2â€”, â€”CH&boxH;CHâ€”, â€”COOâ€” and â€”OCOâ€”, E is a divalent radical from the group consisting of a chemical bond, â€”Oâ€”, â€”COOâ€”, â€”OCOâ€” and â€”CH2â€”Oâ€”, F is a chain of from 0 to 11 CH2 groups, in which individual, non-adjacent CH2 groups may be replaced by oxygen, VN is a â€”COOâ€”CH&boxH;CH2, â€”COOâ€”C(CH3)&boxH;CH2 or â€”Oâ€”CH&boxH;CH2 group, an oxiranyl group or a â€”(CH2)uâ€”OCH&boxH;CH2 group, u is an integer from 2 to 8, m and p are integers from 3 to 7, n and q are 0 or 1, t is an integer from 1 to 3, and r is an integer from 1 to 3, with the proviso that the combinations of radicals A with radicals B do not constitute phenyl ester derivatives of aliphatic, aromatic or heteroaromatic carboxylic acids.