Patent ID: 8188157
Filing Date: 2012-05-29
Classification: C08K,C09D,Y10T

Abstract:
1. A UV curable coating composition which when cured is abrasion resistant, said composition consisting of: a) trimethylolpropane triacrylate in an amount between about 5% and about 85% by weight of the composition, b) N,N-dimethyl acrylamide in an amount between about 1 and about 30% by weight of the composition, c) an inorganic filler consisting of silica nanoparticles in an amount between about 30 and about 50% by weight of the composition and wherein at least about 50% of the silica nanoparticles are present as a premix with trimethylolpropane triacrylate, and d) at least one photoinitiator which absorbs only in the UV range of the electromagnetic spectrum; wherein a cured coating of the UV curable coating composition maintains about 95% or higher of its post-cure gloss when subjected to about 100 cycles of grade 3 steel wool with a load of about 50 lbs applied per Federal Specification FF-W-1825.