Patent ID: 8383736

Claim:
A method for preparing a polyolefin containing one or more exo-olefinic end groups on the polymer chain from a monomer, comprising quenching a cationic quasi-living polyolefin polymer with one or more substituted pyrroles after high conversion of the monomer has occurred, wherein the one or more substituted pyrroles have the general formula wherein: R 1 and R 4 are independently alkyl containing one carbon atom to about 20 carbon atoms, R 2 and R 3 are independently hydrogen or alkyl containing one carbon atom to about 20 carbon atoms, cycloalkyl of about 3 to about 7 carbon atoms, aryl of about 6 to about 30 carbon atoms, alkaryl of about 7 to about 30 carbon atoms, or aralkyl of about 7 to about 30 carbon atoms.