Patent ID: 6844950
Filing Date: 2005-01-18
Classification: C08F,C08G,C08K,C08L,C09K,G02B,Y10T

Abstract:
1. An optical article having a surface with a replicated microstructure comprising a plurality of utilitarian discontinuities having an optical purpose, said optical article comprising an organic resin having a haze rating corresponding to a value, as determined by ASTM procedure D1003 on a flat film 3.2 mm thick on a bisphenol A polycarbonate substrate, of up to 5% and said resin being prepared by curing a radiation curable composition comprising: (A) at least one oligomeric urethane multi(meth)acrylate, optionally in combination with at least one other monomer effective to reduce viscosity, improve thermomechanical properties or increase refractive index; (B) nanoparticles of at least one ethylenically unsaturated metal compound selected from the group consisting of tetravalent titanium and tetravalent zirconium compounds; and (C) at least one photoinitiator.