Patent No. US 6,710,082 B1: Spanish researchers for Cognis Deutschland GmbH & Co. KG, Düsseldorf, Ger-many, patented a process for increasing the viscosity of an aqueous surface-active composition by adding an effective, viscosity-enhancing amount of a hydroxycarboxylic acid.
Cognis Patents Use Of Esters as Thickeners
Published November 15, 2005
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