Dow Corning Corporation

Dow Silicones Corporation

Dow Corning Toray Company, Ltd.

Pascal Delbrassinne

Jean-Paul H Lecomte

Jacqueline L'Hostis

Laurence Gallez

Jianren Zeng

Alain Hilberer

Mathilde Guette

Jean-Paul Lecomte

A process for washing a substrate. The process involves providing a detergent composition that includes a surfactant and an antifoam. The antifoam comprises a hydrophobic fluid having a surface tension of at least 27 mN/m and less than 40 mN/m and a finely divided solid hydrophobic filler dispersed in the hydrophobic fluid. The process further involves washing the substrate in an aqueous medium with the detergent composition. The antifoam does not affect foaming during the washing step. During the washing step, the detergent composition is applied to the substrate. The process further involves rinsing the substrate with the applied detergent composition with water, whereby foaming during the rinsing step is inhibited.

Foam control composition

This invention relates to a foam control composition comprising: (A) a silicone antifoam comprising (i) an organopolysiloxane having at least one silicon-bonded substituent of the formula X&#x2014;Ar, wherein X represents a divalent aliphatic group bonded to silicon through a carbon atom and Ar represents an aromatic group, (ii) an organosilicon resin having the formula RSiOwhere Rrepresents a hydrocarbon, a hydrocarbonoxy or a hydroxyl group and a has an average value of 0.5 to 2.4, and (iii) a hydrophobic filler; and (B) an organopolysiloxane resin having at least one polyoxyalkylene group in which the organopolysiloxane resin comprises tetrafunctional siloxane units having the formula SiOand monofunctional siloxane units having the formula RSiO, wherein the total number of tetrafunctional siloxane units in the resin is at least 50% based on the total number of siloxane units, and Rrepresents a hydrocarbon group. The foam control composition may be added to a potentially foaming liquid, particularly a detergent, such as an HDL detergent.

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Rixensart, Belgium

Pascal Delbrassinne