SYNTHESIS OF SILOXANES CONTAINING ACID-SENSITIVE SIDE-GROUPS

New siloxanes with acid-sensitive substituents have been synthesized b y means of hydrosilylation, starting from methylhydrosiloxanes. Detail s of the preparation and characterization are reported. p-t-Butoxycarb onyloxystyrene, p-t-butoxystyrene and t-butyl methacrylate turned out to be excellent reagents in these experiments. H-1, C-13 and Si-29 nuc lear magnetic resonance techniques were used for characterization. The ratio between alpha and beta addition appears to be strongly dependen t on the substituents at the vinyl group of the organic moieties.