Urethane acrylate composite structure

Abstract

A urethane acrylate composite structure includes a first layer that is a show surface of the urethane acrylate composite structure and a support layer. The support layer includes a urethane acrylate composition that includes a urethane acrylate adduct. The urethane acrylate adduct is the reaction product of an isocyanate component and a stoichiometric excess of a functionalized acrylate component. The isocyanate component includes toluene diisocyanate and polymeric polyphenylmethane polyisocyanate. The functionalized acrylate component is reactive with the isocyanate component. The urethane acrylate composition exhibits improved viscosity due to the isocyanate component. The combination of the toluene diisocyanate and the polymeric polyphenylmethane polyisocyanate results in the improved viscosity of the urethane acrylate composition while maintaining excellent resin curing and finished composite structure properties.

Dependencies are inferred from the claim text.