Patent ID: 8754145

Claim:
A transparent, radiation-curable acrylate coating composition comprising (a) at least three polyfunctional acrylate derivatives, (b) a photoinitiator selected from the group consisting of phosphine oxides, ketones, and combinations thereof, (c) a nanoscale filler, and (d) a dibenzoyl resorcinol UV absorber, at least one of said acrylate derivatives being an aliphatic polyester urethane multi-acrylate having an acrylate functionality of at least 5 and an elongation of no greater than 5%, and at least two of said acrylate derivatives being diacrylates, wherein at least one of said diacrylates is an aliphatic polyester urethane diacrylate having an elongation of greater than 5% and a number average molecular weight of from about 500 to about 2500 and wherein another of said diacrylates is a urethane-free diacrylate having a number average molecular weight of from about 150 to about 600 wherein the aliphatic polyester urethane multi-acryalte is present in an amount of 10 weight percent to 80 weight percent of a dry coating, wherein the aliphatic polyester urethane diacrylate is present in an amount of 5 weight percent to 50 weight percent of the dry coating, and wherein the urethane-free diacrylate is present in an amount of 3 weight percent to 30 weight percent of the dry coating.