Abstract
Hydrosilylation of allyl carbonates by polymethylhydrosiloxane is a rather complex reaction. During the platinum catalyzed modification of polymethylhydrosiloxane with allyl phenyl carbonate, about 50% of the carbonate molecules decompose into CO2, propene and phenol. The released phenol reacts with the SiH functions of the polymer yielding Si-O-phenyl side groups. However the cleavage reaction can be avoided by using butenyl phenyl carbonate instead of allyl phenyl carbonate.
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