Patent ID: 8053480

Claim:
A process comprising the steps of: A) mixing, before step (B), (i) a finely divided filler comprising silica with a surface area as measured by BET measurement of at least 50 m 2 /g, (ii) a polyorganosiloxane having at least two reactive substituents capable of addition reaction with component (iii) via hydrosilylation, and (iii) a polyorganosiloxane having at least three reactive substituents, capable of addition reaction with component (ii) via hydrosilylation; B) followed by causing hydrosilylation reaction of components (ii) and (iii) in the presence of a transition metal catalyst wherein the hydrosilylation reaction is conducted until the reaction mixture at least partially gels, and shearing forces are applied to this at least partially gelled reaction mixture and wherein the foam control composition is combined with an aqueous environment selected from inks, coatings, paints, detergents, black liquor of from those encountered during pulp and paper manufacture, waste water treatment, textile dyeing processes or the scrubbing of natural gas.