Method for making a reinforced rim elastomer

摘要

A method for making a high strength composite of a reinforcing mat impregnated with reaction injection molded (RIM) polyurethane elastomer is disclosed. The method comprises placing the reinforcing mat in a mold cavity and injecting into the mold cavity a formulation capable of forming a reaction injection molded polyurethane elastomer comprising a polyol of above about 500 equivalent weight, a chain extending agent, a delayed action catalyst and a polyisocyanate.