Patent ID: 8343303

Claim:
A composition comprising a) one or more isocyanate functional polyether polyurethane prepolymers; and b) from about 0.1 to about 10 parts by weight of one or more polyurethane based prepolymers of one or more polyisocyanates and one or more polyester polyols wherein the terminal groups on the polyisocyanate-polyester polyol based polyurethane prepolymer are the residue of a monofunctional polyalkylene glycol which polyurethane based prepolymers exhibit a number average molecular weight of about 2,000 to about 15,000 Daltons; wherein the composition is a low viscous paste having a viscosity of less than 10,000 Pa s at temperature of from about 40 to 80° C. and is a high viscous paste having a viscosity of greater than 50,000 Pa s at a temperature of below about 40° C.; wherein the total parts by weight of the composition is 100.