Rhodium containing catalysts for the synthesis of epoxysiloxane/epoxysilicone monomers and polymers

摘要

The invention provides a method for making a curable epoxysilicone composition through the hydrosilation reaction between an ethylenically unsaturated epoxide and an SiH-containing silicone to produce an epoxysilicone product, and catalyzed by a rhodium containing selective catalyst which does not promote the oxirane ring-opening reaction of either the ethylenically unsaturated epoxide starting material or the epoxysilicone product. The rhodium containing selective catalyst has the general formulaPP[R.sub.4 M].sup.+ [RhCl. sub.3 Br].sup.- PPwherein M is phosphorous or nitrogen and R is an organic radical comprising a C.sub.1-18 linear alkyl radical, aryl, alkaryl or aralkyl radical.