Patent ID: 7271202

Claim:
A reactive hot melt composition in the form of free-flowing pellets, the composition comprising: a cross-linkable resin comprising, one of an ethylene-acrylic acid copolymer, an ethylene-methacrylic acid copolymer, and an ethylene-acrylic acid-methacrylic acid terpolymer, having a melt flow rate, when measured according to ISO 1113, of more than 100 g/10 minutes at 190° C. and 2.16 kg, said cross-linkable resin further comprising at least one or more additional copolymers of ethylene with an ethylenically unsaturated monomer; from about 10 to about 30 percent based on the total weight of the composition, of an adhesion promoter for providing adhesive properties to the composition at temperatures of about 50 to about 100° C., wherein the adhesion promoter comprises at least one of a plasticizer and a tackifier; a free radical cross-linking initiator having a 1 hour half-life temperature of from about 110° C. to about 170° C.; and a foaming agent; wherein the composition is such that it can be melted and extruded on to a substrate at a temperature of from about 90° C. to about 120° C. without curing, and can be cured at a temperature of from about 120° C. to about 200° C.