Thermally stable hot melt moisture-cure polyurethane adhesive composition

摘要

Hot melt adhesive compositions combining the characteristics of thermoplastic hot melt adhesives and reactive adhesives can be prepared by blending a polyester polyether thermoplastic elastomer having the formula wherein Nu is a predominately cyclic nucleus and R1 is randomly selected from either a C2-6 alkylene or an amorphous polyether subunit comprising a polyoxyalkylene group with a polyisocyanate prepolymer. The resulting composition is flexible and may be used as an adhesive or as a sealant.