Anti-foaming agents, the preparation thereof, and their use in aqueous systems

摘要

This invention is directed to a method for preparing foam inhibitors for aqueous systems, which comprises the steps of: (a) mixing a higher-molecular branched-chain primary alcohol or from about 18 to 30 carbon atoms with hydrophobic colloidal silica in an alcohol to silica ratio of from about 100:2 to 100:20; (b) heating the mixture from step (a) under stirring to temperatures of from about 100 DEG to 240 DEG C.; and (c) allowing the heated mixture from step (b) to cool to room temperature. This invention is also directed to the suds regulators prepared and their use in aqueous detergent systems.