Method for the preparation of organopolysiloxanes

摘要

A method for the preparation of an organopolysiloxane comprising polymerizing at least one organosiloxane in the presence of a strong acid catalyst, and subsequently neutralizing said catalyst by the addition of a neutralizing agent, is disclosed wherein the neutralizing agent is ammonia gas. The invention leads to a substantial abbreviation in the neutralization time and, because it affords a nearly complete neutralization of the acid catalyst, the method provides an organopolysiloxane which has excellent heat resistance.