Acid equilibration method for organic polysiloxanes having carbon-silicon-bonded aromatic organic radicals.

摘要

A method is provided for the acidic equilibration of aromatic organic-substituted siloxanes, such as diphthalic anhydride tetraorganicsiloxane with poly(aliphatic organicsiloxane) without significant cleavage of carbon-silicon-bonded aromatic organic radicals. A reduction in the generation of aromatic organic compounds, such as phthalic anhydride, can be achieved by effecting equilibration by adding the aromatic organic-substituted siloxane to a preformed mixture of acid-catalyzed poly(aliphatic organicsiloxane).