Process for preparing organosilicon high condensation products

摘要

A process for preparing an organosilicon high condensation product having no silanol group in the terminal of the molecule, the process comprising the steps of hydrolyzing a mixture of an organosilicon compound represented by the formula (A) <IMAGE> wherein R represents a hydrocarbon group having 1 to 8 carbon atoms and/or a low condensation product thereof and an organosilicon compound represented by the formula (B) <IMAGE> wherein R' represents a hydrocarbon group having 1 to 12 carbon atoms and R is as defined above and/or a low condensation product thereof in the presence of an acid catalyst, and adding an alkaline material to the reaction product to adjust its pH to more than 7, thereby causing condensation reaction.