Patent ID: 6110988
Filing Date: 2000-08-29
Classification: C08F,C09D

Abstract:
An ultraviolet curable coating composition for forming a scratch-resistant, exterior-durable coating, comprising:an inert solvent;about 5% to about 90% by weight relative to the weight of the overall coating composition exclusive of the inert solvent present, of an acrylated aliphatic urethane, said acrylated aliphatic urethane having a number average molecular weight of between about 500 and 2000 and formed by the reaction of a first multifunctional acrylate with a molecular weight of about 190 to about 500 and containing at least three polymerizable acrylate groups per molecule with an aliphatic urethane comprised of a polymer of alkyl carbomonocyclic diisocyanate with alkanepolyol polyacrylate;about 5% to about 30% by weight, relative to the weight of the overall coating composition exclusive of the inert solvent present, of one or more multifunctional acrylates having a molecular weight of about 170 to 1000 and containing at least two polymerizable acrylate groups per molecule;a photopolymerization initiator or sensitizer; anda light stabilizer;the complete curing of said ultraviolet curable coating composition being achievable by the application of ultraviolet radiation to form a scratch-resistant, exterior durable coating.