Patent ID: 6133400
Filing Date: 2000-10-17
Classification: B32B,C08G,Y10S,Y10T

Abstract:
A hot melt moisture cure polyurethane composition comprising the reaction product of:a) at least one polyether polyol formed from at least one compound selected from the group consisting of ethylene oxide, propylene oxide, 1,2-butylene oxide, 1,4-butylene oxide and mixtures thereof;b) at least one low molecular weight polyalkylene glycol, the alkylene groups of which have 3 to 7 carbon atoms;c) at least one crystalline polyester polyol having a melting point of from about 40.degree. C. to about 120.degree. C.; andd) at least one polyfunctional isocyanate;wherein the resultant one-part hot melt moisture cure polyurethane has a moisture vapor transmission rate of greater than about 100 grams per meter squared per day at a film thickness of about 400 to about 500 g/m.sup.2, and hydrolysis resistance.