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US 9,738,797 B2Granted
Use of polyglycerol partial esters as defoamers
AssigneeEvonik Deguesse GmbH
InventorsMargitta Nilewski, Philippe Favresse, André Scharf, Petra Gehrmann, Thomas Mettin, Michael Schwan, Oliver Springer, Tobias Wied
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Abstract
The present invention relates to the use of polyglycerol partial esters as defoamers, in particular in coating and paint applications, to defoamers comprising polyglycerol partial esters, and to corresponding polyglycerol partial esters.
Claims4
A method of defoaming a liquid, comprising:
- providing polyglycerol partial esters that are obtained by esterification of a polyglycerol mixture with acids comprising:
- a saturated or unsaturated, linear or branched fatty acid having 4 to 22 carbon atoms, and/or an aromatic monocarboxylic acid having 7 to 22 carbon atoms;
- and
- a polyfunctional carboxylic acid having 4 to 54 carbon atoms, and/or its anhydride or ester;
- and
- defoaming the liquid by applying the polyglycerol partial esters to the liquid;
- wherein the degree of esterification of the polyglycerol mixture is between 76 and 100%;
- and
- wherein the polyglycerol mixture is based on polyglycerols with an average degree of condensation in a range of 3-5.
6 more elements
Dependencies are inferred from the claim text.