Patent ID: 6713570
Filing Date: 2004-03-30
Classification: C08G

Abstract:
A moisture curable, hot melt adhesive coating and/or sealant composition comprising:(a) a first isocyanate-terminated prepolymer comprising the reaction product of an at least essentially semicrystalline hydroxy-functional material and a polyisocyanate; (b) a second isocyanate-terminated prepolymer comprising the reaction product of an essentially semi-crystalline poly(tetramethylene ether) glycol that has a molecular weight of at least about 1000 and a polyisocyanate; and (c) a third isocyanate-terminated prepolymer comprising the reaction product of an essentially amorphous hydroxy-functional material and a polyisocyanate, the essentially amorphous hydroxy-functional material having an average functionality less than 2.5 and a Tg&lE;âˆ’20Â° C.; wherein all essentially amorphous hydroxy-functional materials in the composition have a Tg&lE;âˆ’20Â° C.