Patent ID: 6136921
Filing Date: 2000-10-24
Classification: C08C,C08F,C08G,C08L

Abstract:
A coupled polymer, which is prepared by reacting a living alkali metal-terminated polymer with a coupling agent,wherein the living alkali metal-terminated polymer has the formula P-M, where M is an alkali metal, P is a polymeric carbanion of one or more conjugated dienes having 4-12 carbon atoms, or a polymeric carbanion of one or more conjugated dienes having 4-12 carbon atoms and one or more monovinylarenes having 8-18 carbon atoms,wherein the coupling agent has the formula: ##STR5## where R.sub.1, R.sub.3 are independently selected from the group consisting of aliphatic alkyl and alkenyl, and hydrogen, and R.sub.2 is alkylene, alkenylene, divalent cycloalkylene, or divalent arenyl.