Silicone foam control composition

U.S. Patent Number: 5380464

Abstract: There is disclosed a foam control composition comprising (I) a silicone defoamer reaction product and (II) a silicone glycol copolymer, which composition is particularly effective in defoaming highly acidic or highly basic aqueous systems. Component (I) is prepared by heating a mixture of (i) a polyorganosiloxane fluid, (ii) a resinous silicon compound, (iii) a finely divided filler and (iv) a catalytic amount of a compound for promoting the reaction of the other components at a temperature of 50.degree. C. to 300.degree. C.

Inventors: McGee; James B. (Midland County, MI), Petroff; Lenin J. (Bay County, MI), Aizawa; Koichi (Kamakura, JP), Shoji; Hiroaki (Minamiasigara, JP)

Assignee: Dow Corning Corporation (Midland, MI)

Application Number: 07/479,022

Issued: 1995-01-10

Expired: 2007-01-10

Classes: 516/118

Field of search: 252/321,358

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