METHOD OF PREPARING OLIGOALKYL SILOXANES Russian patent published in 2000 - IPC

FIELD: various fields of engineering. SUBSTANCE: described is method of preparing oligoalkyl siloxanes by catalytic regrouping of products of hydrolytic condensation of organosilanes or mixtures thereof in the presence of hexaorgano disiloxane and mixture of catalysts such as sulfonated styrene-divinyl benzene copolymer and sulfuric acid-or hydrochloric acid-activated alumosilicate (clay) in ratio of 3-5 wt % and 1-5 wt %, respectively. Said alumosilicate is charged into process either with sulfonated styrene-divinyl benzene copolymer or 1.5-2 hours later after beginning of process of catalytic regrouping. EFFECT: lower power consumption of process, higher quality of final product, fewer technological stages and reduced losses of the final product. 4 cl, 9 ex