Patent ID: 7759405
Filing Date: 2010-07-20
Classification: C08G,C09D

Abstract:
1. A ultraviolet (UV) curable coating composition comprising (A) 20 to 60% by weight of a urethane acrylate oligomer, (B) 20 to 60% by weight of a ultraviolet (UV) curable monomer, (C) 1 to 10% by weight of an organic solvent, and (D) 1 to 10% by weight of a photoinitiator based on the total weight of the composition, wherein the urethane acrylate oligomer has 6 to 9 functional acrylate groups and exhibits a viscosity of 500 to 30,000 cps (centipoise) at room temperature wherein the urethane acrylate oligomer is prepared by reacting a polyisocyanate compound having three or more isocyanate groups with an acrylate compound having one or more hydroxyl groups and three or more acryl groups in the presence of a metallic catalyst and a radical polymerization inhibitor and wherein the acylate compound is a mixture of pentaerythritol triacrylate and pentaerythritol tetraacrylate, or a mixture of dipentaerythritol pentaacrylate and dipentaerythritol hexaacrylate.