Acid equilibration method for organcpolysiloxanes 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 anhydrode 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).