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Patents

DSM Patents

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By: KERRY PIANOFORTE

Editor, Coatings World, Coatings World

Patent No. U.S. 7,135,229 B2
DSM IP Assets B.V. has been granted a patent for a radiation-curable composition comprised of a urethane (meth)acrylate oligomer comprised of an alkyd backbone, the alkyd backbone being derived from a polyester, the polyester having pendant ester groups protruding off of a main polymer chain of ester linkages, the pendant ester groups being derived from a compound selected from the group consisting of coconut oil, palm Kernel oil, and hydrogenated varieties of unsaturated oils or fatty acids having an Iodine value below 100 centigrams Iodine I gram sample; a reactive diluent; and a photoinitiator wherein the composition, when cured, has a hydrolysis resistance of less than 30% loss in equilibrium modulus after 30 days exposure at 85°C and 85% relative humidity.

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