Patent ID: 7323248

Claim:
An actinic radiation curable, substantially all solids composition comprising a mixture of at least one oligomer selected from a group consisting of a urethane acrylate, an aliphatic urethane acrylate, an aliphatic urethane triacrylate, a hexafunctional urethane acrylate, a siliconized urethane acrylate, an aliphatic siliconized urethane acrylate, and combinations thereof, wherein the at least one oligomer is present in the mixture between about 15-40% of the composition by weight; at least one monomer selected from a group consisting of an isobomyl acrylate, a tetrahydrofurfuryl acrylate, a propoxylated glyceryl triacrylate, and combinations thereof; at least one free radical photoinitiator; at least one surfactant; and at least one inorganic nano-filler; wherein the composition has a room temperature viscosity up to about 500 centipoise; wherein the composition is a clear coat composition; and wherein the composition when cured as a coating on a composite material is an abrasion and scratch resistant coating having at least one property selected from the group consisting of (a) at least 4H hardness; (b) no yellowing after 7 weeks of accelerated ultra-violet (IJY) radiation testing; (c) 99+% adhesion after 7 weeks of accelerated UV radiation testing; and (d) no softening when wiped at least once with cloth soaked with methyl ethyl ketone wherein the composition is prepared using essentially no solvents.