CPC C09D 135/02 (2013.01) [C08J 5/18 (2013.01); C08J 7/042 (2013.01); C08J 7/043 (2020.01); C08J 7/046 (2020.01); C08J 7/0427 (2020.01); C09D 5/002 (2013.01); C09D 7/62 (2018.01); C09D 7/67 (2018.01); G02B 1/14 (2015.01); C08J 2367/02 (2013.01); C08J 2435/02 (2013.01)] | 20 Claims |
1. A hardcoat composition comprising:
one or more multifunctional (meth)acrylate monomers; and
a nanoparticle mixture dispersed within the one or more multifunctional (meth)acrylate monomers, the nanoparticle mixture comprising:
1% to 15% of a first population of reactive nanoparticles wherein reactive nanoparticles are nanoparticles modified with surface groups that react with the multifunctional (meth)acrylate monomers, the first population of reactive nanoparticles have an average particle diameter in a range from 5 nm to 60 nm; and
99% to 85% of a second population of non-reactive nanoparticles wherein non-reactive nanoparticles are nanoparticles modified with surface groups that are not capable of reacting with the multifunctional (meth)acrylate monomers, the second population of non-reactive nanoparticles have an average particle diameter in a range from 5 nm to 60 nm, wherein the hardcoat composition upon curing forms a hardcoat that exhibits no visible scratch after at least 500 scratch cycles when tested for abrasion resistance using a mechanical device with a 3.0 kg weight and capable of oscillating an abrasive material adhered to a stylus across the hardcoat where the oscillation was performed perpendicular to the coating direction, and the stylus was a cylinder with a flat base and a diameter of 3.2 cm, oscillated over a 60 mm wide sweep width at a rate of 210 mm/sec (2 wipes/second), and the abrasive material was steel wool #0000 adhered to the stylus.
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