NICKEL AND COBALT PBD WITH IMPROVED PROCESSABILITY

A material produced via polymerizing conjugated diene monomer to generate a polydiene cement solution; terminating the polydiene cement solution with a protic organic compound; connecting polymer chains by reacting (1) a compound containing sulfur and a halogen with (2) a compound having at least one carbon-carbon unsaturated bond; and adding a product of the reaction to the cement solution to generate a new polydiene rubber.