Patent ID: 7763664
Filing Date: 2010-07-27
Classification: B01D,D21H

Abstract:
1. An antifoam and/or deaerator based on an oil-in-water dispersion comprising an oil phase of at least one hydrophobic compound and an aqueous phase which comprises at least one stabilizer, water and, optionally, a thickener, wherein the oil-in-water dispersion comprises a combination of component (i) at least one polyglyceryl ester which is obtained by at least 20% esterification of polyglycerol with a carboxylic acid of 12 to 36 carbon atoms and component (ii) at least one bisamide of ethylenediamine and carboxylic acids of 10 to 36 carbon atoms, wherein the hydrophobic compound is selected from the group consisting of the alcohols of at least 12 carbon atoms, mono-, di- and triglycerides of fatty acids, fatty acid esters of carboxylic acids of at least 12 carbon atoms and monohydric to tetrahydric alcohols of 1 to 24 carbon atoms, 3-thiaalkan-1-ols, 3-thiaoxoalkan-1-ols, 3-thiadioxoalkanols, esters of the thiaalkane compounds and mixtures thereof, and wherein the dispersion excludes fatty acids of 12 to 26 carbon atoms and alkoxylated fatty alcohols.