... (Source: Charles A.Harper, Handbook of Plastics, Elastomers, and Composites, 3d ed., McGraw-Hill, New York,1996, p. 2.2)Thermosets, Reinforced Plastics, and Composites Downloaded from Digital ... wide range of colors, high strength/weight ratio, and, more importantly, because of the introduction of molding equipment capable of injectionThermosets, Reinforced Plastics, and Composites Downloaded ... curing agent. Because of the hazards involved in handling free isocyanate,prepolymers of the isocyanate and the polyol are generally used.Thermosets, Reinforced Plastics, and Composites Downloaded...