Patent ID: 8053529

Claim:
A process for the polymerization of one or more addition polymerizable monomers to form a copolymer comprising two regions or segments of differentiated polymer composition or properties, said process comprising: 1) contacting an addition polymerizable monomer or mixture of monomers under addition polymerization conditions in a reactor or reactor zone with a composition comprising at least one olefin polymerization catalyst and a cocatalyst and characterized by the formation of polymer chains from said monomer or monomers; 2) transferring the reaction mixture to a second reactor or reactor zone and optionally adding one or more additional reactants, catalysts, monomers or other compounds prior to, commensurate with, or after said transfer; and 3) causing polymerization to occur in said second reactor or reactor zone to form polymer chains that are differentiated from the polymer chains formed in step 1); said process being characterized by addition of a chain shuttling agent to the reaction mixture prior to or during, step 2 such that at least some of the resulting polymer molecules from step 3) comprise two or more chemically or physically distinguishable blocks or segments.