Patent ID: 7691481

Claim:
A composite article comprising: an acrylic layer; a polyurethane layer comprising the reaction product of a polyol resin and a stoichiometric excess of polyisocyanate; and a UV-cured layer disposed between said acrylic layer and said polyurethane layer, formed from a UV-curable composition exposed to UV electromagnetic radiation, wherein said UV-curable composition comprises: at least one monomer comprising an ethylenically unsaturated methacrylate monomer, an ethylenically unsaturated acrylate monomer, or a combination thereof, wherein said at least one monomer is compatible with said acrylic layer and has hydroxy functional groups reactive with said polyisocyanate, a curing initiator reactive with said at least one monomer upon exposure to UV electromagnetic radiation, and a rheology additive comprising a reduction agent in an amount of from 60 to 98 parts by weight based on 100 parts by weight of said UV-curable composition, wherein said reduction agent is water, said at least one monomer is in solution with said reduction agent, and said stoichiometric excess of polyisocyanate ranges from 130 to about 150 and is further defined as a number of equivalents of NCO groups in said polyisocyanate divided by a total number of isocyanate reactive hydrogen atom equivalents in said polyol resin multiplied by 100.