Synthesis of linear and branched oligodialkylalkylhydrosiloxanes

New linear and branched oligodialkylalkylhydrosiloxanes were prepared by hydrolytic cocondensation of various functional organosilanes with diethyl(dimethyl-)dichlorosilane, ethylhydro-(methylhydro-) dichlorosilane, and trimethylchlorosilane, followed by catalytic rearrangement in the presence of an electrophilic catalyst. The products are of interest as hydrophobizing agents and starting compounds for replacement of hydrogen atoms at silicon by other substituents.