ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,552,895, issued on Feb. 17, was assigned to COATEX (Genay, France).
"Continuous preparation of polyurethanes or polyureas" was invented by Benoit Magny (Cailloux sur Fontaines, France), Yves Matter (Reyrieux, France) and Jean-Marc Suau (Lucenay, France).
According to the abstract* released by the U.S. Patent & Trademark Office: "Associative thickeners, and more particularly to associative thickeners of the HEUR type, may be used in aqueous formulations. In particular, a method for continuous preparation of HEUR-type associative thickeners may include reactive extrusion. These products are suitable to be used in aqueous formulations. Such a method may include: continuously preparing a...