Patent ID: 7344619
Filing Date: 2008-03-18
Classification: A41D,B32B,C08G,Y10T

Abstract:
1. A method of making a water repellent laminate comprising a primary substrate having a first surface and a second surface and a secondary substrate having a bonding surface and an exposing surface, said bonding surface and exposing surface of said secondary substrate have been treated with a water repellent material, said method comprising: a) applying a hot melt moisture cure polyurethane adhesive composition on said first surface of said primary substrate to form an adhesive bearing surface; and b) bonding said adhesive bearing surface of said primary substrate with said bonding surface of said secondary substrate to form a laminate, wherein said adhesive composition comprises a hot melt moisture cure polyurethane prepolymer having a weight average molecular weight of no greater than about 20,000 g/mole, said prepolymer being a reaction product of a polyol component and a polyisocyanate component, said polyol component comprising a first polyether polyol formed from at least one monomer chosen from ethylene oxide, propylene oxide, 1,2-butylene oxide, 1,4-butylene oxide, or mixtures thereof; a first polyester polyol having a melting point of less than about 40° C.; and a crystalline polyester polyol having a melting point of from about 40° C. to about 120° C.