Polyurethane Sealant Compositions

August 10, 2005

l Patent No. U.S. 6,512,033 B1
Essex Specialty Product Inc. has been awarded a patent for a sealant composition comprising a urethane prepolymer having an isocyanate functionality of at least two and an average molecular weight of at least 2,000; a catalytic amount of a tin compound which catalyzes the reaction of isocyanate moieties with water or an active hydrogen containing compound; and a stabilizing amount of an organophosphite which has an alkaryl ligand or both an aliphatic ligand and an aromatic ligand.