Synthesis and properties of branched oligoaryloxysiloxanes

Abstract Branched oligoaryloxysiloxanes were prepared by the reaction of organochlorosilanes with diphenylolpropane. A study was made of the effect of temperature, duration of the process, functionality of initial reagents, presence of monofunctional substances, concentration and the type of solvent on the course of the reaction. It was shown that in the presence of a monofunctional material (trimethylchlorosilane) the reaction may be controlled, stopped at the beginning of gel formation. The use of an acetone-toluene mixture as solvent enables the reaction to be controlled by a similar mechanism.