Patent ID: 7449541

Claim:
A polyurethane/polyurea material comprising: a polyol component and an isocyanate component reaction injection molded to form the polyurethane/polyurea material, the polyol component comprising a first polytetramethylene ether glycol having a molecular weight of approximately 1000, a second polytetramethylene ether glycol having a molecular weight of approximately 2000 and a 3,5-diethyl-2,4 toluenediamine, the isocyanate component comprising a quasi-polyurethane prepolymer comprising methylene-4,4′-diphenyldiisocyanate and a glycol and having a free isocyanate content of greater than 15 weight percent of the isocyanate component, wherein the polyol component comprises 55 to 70 weight percent of the polyurethane/polyurea material and the isocyanate component comprises 30 to 45 weight percent of the polyurethane/polyurea material.