Patent ID: 7517936

Claim:
A curable sealant composition comprising the reaction product of: a) a polymer comprising conjugated diene monomer units in a backbone of said polymer, and b) a silicon containing functional group of the structure: wherein R 1 , R 2 , R 3 , and R 4 are independently selected from the group consisting of hydrocarbon, alkoxy groups, and mixtures thereof, wherein at least one of R 1 , R 2 , R 3 , and R 4 comprises an alkoxy group selected from the group consisting of methoxy, ethoxy, propoxy, butoxy, pentoxy, and mixtures thereof, wherein said functional group forms a terminal group on said polymer and further wherein the polymer has a 1,2-microstructure content of about 40-70%, a weight average molecular weight (M w ) of about 10,000-60,000 and a polydispersity of less than about 1.8.