Dow Corning S.a.

Other

Jan Sybren Hoogland

George C Sawicki

Franck A Renauld

Jacqueline L'Hostis

Bertrand Louis Lenoble

Anick Colson

Sophie Stassen

Mark A Prince

Pierre Andre Germain

Bernhard Ernst Gold

A foam control agent comprises (A) an organopolysiloxane material having at least one silicon-bonded substituent of the formula X&mdash;Ph, wherein X denotes a divalent aliphatic hydrocarbon group and Ph denotes an optionally substituted aromatic group, (B) an organosilicon resin and (C) a hydrophobic filler. The organosilicon resin (B) preferably consists of siloxane units of the formula R&prime; SiO wherein R&prime; denotes a hydroxyl, hydrocarbon or hydrocarbonoxy group, particularly trialkylsiloxy units and SiO4/2 units, wherein a has a value of from 0.5 to 2.4. The foam control agent may be provided as an emulsion or as a particulate material. It is especially useful as a detergent foam control agent.

Silicone foam control agent

The foam control efficiency of a silicone antifoam in liquid or powder detergent formulations is improved by the use as an additive of an olefinically unsaturated alcohol, for example oleyl alcohol.

Foam control agents

A method of making a particulate foam control agent comprising 0.001 to 30 parts of silicone antifoam, 45 to 99 parts of a zeolite and 0 to 30 parts of a binder, preferably of a polycarboxylate-type, able to release at least some antifoam from the zeolite in the first 10 minutes of a washing cycle comprises depositing from 0.1 to 500% of the silicone antifoam of an organic surfactant onto the zeolite not later than depositing the silicone antifoam, at least 1 part of surfactant being used per 100 parts of the foam control agent. Also covered are detergent compositions and some foam control agents.

Particulate foam control agents and their use

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Brussels, Belgium

Jan Sybren Hoogland