Patent ID: 7235152

Claim:
A method for adhering two layers of material comprising the steps of: providing an adhesive paste formulation comprising a plurality of first solid particles comprising a surface protected polyisocyanate and a plurality of second solid particles of polymer having functional groups that react with the polyisocyanate, wherein said second solid particles of polymer having groups that react with the polyisocyanate comprises particles having an average particle size diameter in the range of about 0.1 μm to about 300 μm, said second solid particles of polymer having the characteristic property of not dissolving in water and, if added to water without a dispersion aid, sinking or rising rapidly to form a layer of agglomerated particles, wherein said polymer having groups that react with the polyisocyanate comprises a polyester having a weight average MW greater than about 400; applying the adhesive paste composition to a first layer of textile material; drying said paste formulation at a temperature high enough to evaporate volatile components but not high enough to activate a crosslinking reaction; contacting a second layer of material to the paste on the first layer of textile material under heat and pressure, whereby the two layers of material are bonded together.