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US 5,632,860 AGranted
Method of controlling foam in aqueous systems
AssigneeBetzDearborn Inc.
InventorsWilliam A. Hendriks, Daniel J. Barnett
Life of this patent
Estimating the term…
Abstract
A method for controlling foam in the papermaking operation comprising a polyether surfactant and polyethoxylated sorbitol hexaoleate.
Claims6
A process for controlling foam in the wet end of a papermaking system at temperatures above about 120.degree. F. consisting essentially of adding to the system a sufficient amount for the purpose of a defoaming agent of from about 10-90%, by weight, of a polyether surfactant and from about 10-50%, by weight, of a polyethoxylated sorbitol hexaoleate.
Dependencies are inferred from the claim text.