Patent ID: 8735493

Claim:
A method of making a polysiloxane containing polymer comprising the steps of: polycondensation of (a) 100 parts by weight of oligomers comprising non-cyclic siloxane containing oligomers having at least two condensable groups per molecule alone or in a mixture with one or more organic oligomers having at least two condensable groups per molecule in the presence of: (b) at least 2 parts by weight per 100 parts of (a) of one or more condensation catalysts comprising a Bronsted acid or a Lewis acid; and (c) at least 15 parts by weight per 100 parts of (a) of one or more liquefied gases or a supercritical fluid therefrom; and subsequently recovering the polysiloxane containing polymer by expansion of the liquefied gas(es) or supercritical fluid.