Patent ID: 7955471

Claim:
A method for bonding substrates comprising the steps of (a) heating a moisture-reactive hot-melt adhesive composition formed by a process comprising admixing components comprising at least one polyol; at least one polyisocyanate; at least one amorphous non-reactive acrylic polymer having a weight-average molecular weight of 40,000 or greater; 0.5% or less by weight reactive acrylic polymer, based on the weight of said hot-melt adhesive composition; and 5% or less by weight thermoplastic ethylene copolymer resins, based on the weight of said hot-melt adhesive composition; wherein said amorphous non-reactive acrylic polymer has no hydroxyl groups; (b) contacting said heated hot-melt adhesive composition to at least one rigid lineal substrate and at least one flexible wrap substrate; (c) cooling, or allowing to cool, said heated hot-melt adhesive composition; and (d) reacting said hot-melt adhesive composition with water or allowing it to react with water, wherein said hot-melt adhesive composition, after said step (d), is not a pressure-sensitive adhesive, and wherein said hot-melt adhesive composition does not include tackifying resin; wherein said amorphous non-reactive acrylic polymer has no hydroxyl, amine, or thio groups; and wherein said amorphous non-reactive acrylic polymer has carboxylic acid groups in the amount of greater than 0 to 70 micromole of carboxylic acid groups per gram of said amorphous non-reactive acrylic polymer.