| 摘要 |
The present invention relates to cyclic siloxanes which have at least one group of formula (1) bonded to a silicon atom -(CH2)x-R''-[-L-A-]y-(L)z-T(1), in which x is an integer having a value of at least 2, preferably having a value of from 2 to 10, R'' is a chemical bond or a divalent radical of the formula -COO-, -OOC-, -CH2-CH2-, -CH=CH-, -C 3BOND C-, -N=N-, -N=N(O)-, -CH=N-, -N=CH-, -N=N-, -N=N(O)-, -N=CH-, -CH=N-, or -Si(R)2-, where the radical R is identical or different and is an optionally substituted hydrocarbon radical having from 1 to 18 carbon atoms, L which is the same or different represents the 1,4-phenylene or 1,4-cyclohexylene radicals which are optionally 2-, 3-, 5- and/or 6-substituted by at least one radical Q, Q is the same or different radical selected from hydrogen, fluorine or chlorine atoms or cyano, methyl or trifluoromethyl groups, A is the same or different and represents divalent radicals R'' is a chemical bond or a divalent radical of the formula -CH2-O-, or -O-CH2 -, y is an integer having a value of from 0 to 10, preferably from 0 to 2, z is an integer having a value of from 0 to 10, preferably from 0 to 2, with the proviso that the sum y+z is at least 1, and T is a cholesteryl radical or a substituted or unsubstituted hydrocarbon radical having from 1 to 18 carbon atoms, in which the substituents are preferably selected from the group consisting of halogen atoms, cyano groups, nitro groups, hydrocarbonoxy groups having from 1 to 10 carbon atoms and mixtures thereof.
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