A method for the preparation of an organopolysiloxane

摘要: An organopolysiloxane composed of tetrafuctional siloxane units SiO 2 and monofunctional R 3 0 .5 can be prepared by reacting an alkyl orthosilicate, e.g., ethyl silicate, or a partial hydrolysis product thereof oligomeric containing the in presence catalytic compound which is, different from conventional hydrogen chloride, selected group consisting sulfonic acid group-containing compounds, sulfuric p-toluene acid, phosphonitrile chloride. In particular, cation exchange resins type fluorinated polysulfonic used as catalyst continuous process reaction mixture is passed through bed continuously. The inventive method advantageous over methods because absence problems heavy corrosion apparatuses waste disposal due to