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DSM Patents Multilayer Coating

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By: KERRY PIANOFORTE

Editor, Coatings World, Coatings World

Patent No. U.S. 7,740,944 B2
 DSM IP Assets B.V. has been granted a patent for a multilayer coating in which a plurality of photocurable resin cured films are layered, wherein at least two adjacent layers comprise the same hindered phenol antioxidant in different amounts, and wherein the antioxidant has at least one hindered phenol group, the hindered phenol group containing none or only one sterically hindered alkyl group selected from the group consisting of an i-propyl group, an i-butyl group, and a tert-butyl group and wherein the adjacent layers comprise urethane meth(acrylate), wherein the multilayer coating further is comprised of an amine compound; wherein the amine compound is present in the multilayer coating to prevent the generation of hydrogen gas.

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