Phenylene group-containing organopolysiloxanes and method for their preparation

摘要

Phenylene group-containing organopolysiloxanes formed of a plurality of identical or different units represented by the structural formula: <IMAGE> (1) where in each case all three possible isomers in relation to the position of the SiO3/2-R1 substituents on the phenylene group can be present concurrently, in which R1 stands for -CH2-CH2- or CH3-CH< and the free valences of the oxygen atoms are saturated by silicon atoms of other groups of formula (1) and/or by cross-linking bridge groups. A process for the preparation of these polysiloxanes and the use thereof for the synthesis of carriers of active substances is also disclosed.