Patent ID: 6503981
Filing Date: 2003-01-07
Classification: C08G

Abstract:
A thermally curable hot-melt adhesive composition, comprising(A) a prepolymer having isocyanate groups, a number average molecular mass Mn of 700 to 6000 and wherein 50 to 100% of the reactive isocyanate groups of the prepolymer are blocked, said prepolymer being the reaction product of (1) 25 to 55 wt-% of at least one straight-chain polyester, said polyester being at least semi-crystalline, (2) 1 to 45 wt-% of at least one straight-chain polyester selected from the group consisting of amorphous polyesters and liquid polyesters, (3) 0 to 40 wt-% of at least one polyether, and (4) at least one diisocyanate; and (B) at least one reactive component selected from the group consisting of diamines, epoxide adducts of diamines, and polyalcohols; wherein the weight percentages are based on the combined weight of the polyesters and polyethers.