Reactivity wax content moisture amount hardenability hot melt constituent

摘要

A moisture curable hot melt composition comprises: (a) a first isocyanate-terminated polyurethane prepolymer that is the reaction product of a crystalline polyester polyol and a polyisocyanate; (b) a crystalline, reactive wax; and (c) optionally, a second isocyanate-terminated polyurethane prepolymer that is the reaction product of a polyisocyanate and a hydroxy-functional polymer that is different than the crystalline polyester polyol.