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Rohm and Haas patents

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By: KERRY PIANOFORTE

Editor, Coatings World, Coatings World

Rohm and Haas patents
coating composition
Patent No. U.S. 7,417,086 B2
Rohm and Haas Company has received a patent for a method of making an aqueous composition, suitable when dry as a coating, comprised of providing at least one aqueous polymer that has a glass transition temperature from -80° C to 110° C, wherein the aqueous polymer is made by aqueous emulsion polymerization of a monomer mixture that excludes all dienes and that comprises 1% to 99% acrylate monomers, by weight based on the total weight of all monomers; adding to the aqueous polymer at least 10 ppm of at least one coordinating agent, by weight based on the dry weight of the at least one polymer, and raising the pH of the aqueous polymer from 7 or less to above 7, wherein the aqueous composition contains 0 to 100 ppm ammonia compound, by weight based on the dry weight of the at least one polymer.

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