METHOD OF PRODUCING POLYORGANOSILOXANES Russian patent published in 2016 - IPC C08G77/06 

FIELD: chemistry.

SUBSTANCE: invention relates to chemical engineering of organosilicon compounds. Disclosed is a method of producing polyorganosiloxanes by polycondensation of alkoxy silanes, which is carried out in an aqueous medium, saturated with carbon dioxide under pressure from 150 to 350 ATM in a temperature range from 20 to 110°C. As initial alkoxysilane used is a compound selected from alkoxy silanes of general formula R¹ _aR² _bSi(OR³)_4-(a+b), where R¹=C₁-C₄ alkyl or C₆H₅; R²=C₁-C₄ alkyl; R³=C₁-C₄ alkyl; a=0 or 1 or 2; b=0 or 1.

EFFECT: proposed method is producible, enables to obtain a required polyorganosiloxane with quantitative output at low process time and in the absence of an organic solvent.

1 cl, 4 dwg, 1 tbl, 8 ex