Method of preparing organopolysiloxanes

Claim 1

THE METHOD OF MAKING A POLYSILOXANE RESIN FROM A MIXTURE OF ORGANOHALOGENOSILANES CONTAINING AT LEAST 50 MOL PER CENT METHYLTRICHLOROSILANE AND FREE OF SOLVENT AND CAPABLE OF FORMING A RESIN UPON HYDROLYSIS AND CONDENSATION, WHICH METHOD COMPRISES (1) PROVIDING A VIOLENTLY AGITATED ZONE IN A HYDROLYSIS MEDIUM CONSISTING OF ICE AND WATER AND RAPIDLY INTRODUCING THE MIXTURE OF ORGANOHALOGENOSILANES INTO SUCH ZONE WHILE MAINTAINING AN AMOUNT OF ICE IN SAID HYDROLYSIS MEDIUM EQUAL, BY WEIGHT, TO AT LEAST FOUR TIMES THE WEIGHT OF THE MIXTURE OF ORGANOHALOGENOSILANES SO AS TO MAINTAIN THE TEMPERATURE OF THE AFORESAID HYDROLYSIS MEDIUM SUBSTANTIALLY BELOW 5*C. THROUGHOUT THE ADDITION OF THE ORGANOHALOGENOSILANES, THE CONCENTRATION OF THE HCL RESULTING FROM THE HYDROLYSIS STEP BEING MAINTAINED BELOW 12 PER CENT OF THE WEIGHT OF THE HYDROLYSIS MEDIUM, AND (2) SEPARATING THE THEREBY FORMED WATER-INSOLUBLE POLYSILOXANE TO OBTAIN AN ETHYL ALCOHOL-SOLUBLE PRODUCT.