Patent ID: 9109139
Filing Date: 2015-08-18
Classification: C08F,C08G,C08K,C08L,C09D

Abstract:
1. A UV curable coating composition, consisting of: (1) a solvent; (2) a first aliphatic urethane acrylate resin formed by the reaction of an aliphatic polyisocyanate component consisting of iminooxadiazine dione, isocyanurate, uretdione, urethane, allophanate, biuret or oxadiazine trione groups, with an alcohol component consisting of at least one monobasic, hydroxylfunctional linear or branched alkyl ester of meth(acrylic) acid, wherein the first urethane acrylate resin has an average molecular weight of 800 to 2,500 Daltons, wherein, exclusive of the solvent, the composition consists of 10% to 40% by weight of the first aliphatic urethane acrylate resin, and wherein the first urethane acrylate resin contains 3 to 5 polymerizable acrylate groups per molecule; (3) a second aliphatic urethane acrylate resin consisting of the structure of formula II: wherein A 1 , A 2 , and A 3 are each a group consisting of the structure of formula wherein R (4) a first multifunctional acrylate, wherein the first multifunctional acrylate has an average molecular weight of 170 to 1,000 Daltons, wherein, exclusive of the solvent, the composition consists of 5% to 55% by weight of the first multifunctional acrylate, and wherein the first multifunctional acrylate consists of di-vinyl functionality; (5) a second multifunctional acrylate, wherein, exclusive of the solvent, the composition consists of 5% to 55% by weight of the second multifunctional acrylate, and wherein the second multifunctional acrylate consists of tri-vinyl functionality; (6) a photoinitiator; (7) a hindered amine light stabilizer; (8) a UV absorber consisting of at least one of a benzotriazole and a benzotriazine; (9) an organic-inorganic hybrid material; and (10) wherein said polyisocyanate component includes urethane groups.