One-part curable polyurethane adhesive

摘要

The present invention is a one-part adhesive composition comprising: A) an isocyanate functional polyurethane prepolymer; B) a catalyst capable of catalyzing the reaction of isocyanate moieties with an isocyanate reactive compound; C) particles comprising a curing agent for an isocyanate functional. polyurethane prepolymer encapsulated within a coating material; wherein the prepolymer has a free isocyanate content of from about 0.8 to about 2.2 percent. In another embodiment the invention is a process for bonding two substrates together which comprises rupturing the encapsulated curing agent particles so as to contact the curing agent with the prepolymer in the adhesive composition, contacting the adhesive composition of the invention with at least one of the substrates and contacting the substrates together along the portion of the substrate(s) to which the adhesive has been applied before the adhesive applied cures and allowing the adhesive to cure and bond the substrates together.