Poly(butylene oxide) polyol based polyurethane cast elastomers and methods of making polyurethane cast elastomers

摘要

having a hydroxyl equivalent weight of at least 150, an average of 1.8 to 6 hydroxyl groups per molecule, wherein at least 70% of the hydroxyl groups are primary hydroxyl groups, and an oxyethylene content of 10% by weight or less, based on the weight of the copolymer Copolymers of hydroxyl-containing butylene oxide with ethylene oxide are useful for preparing polyurethanes. These polyols are characterized by high reactivity and fast curing times. Polyurethanes prepared using these polyols have excellent mechanical properties and high hydrophobicity.