Reaction injection molded polyurethanes having particular flexural modulus factors and at least two thermal transition temperatures in a particular range

摘要

Polyurethane reaction injection molded products are prepared which have flexural modulus factors (-20 DEG F./158 DEG F.) below 3.4 and often below 2. They are prepared by employing three different polyols or mixtures of polyols, each polyol having a specified reactivity relationship and are employed within specified solubility parameter relationships. These products also have at least two thermal transition temperatures.