Patent ID: 8389655

Claim:
A process for preparing a propylene containing multi-block copolymer comprising contacting propylene and one or more addition polymerizable comonomers other than propylene under addition polymerization conditions with a composition comprising: the admixture or reaction product resulting from combining: (A) a first olefin polymerization catalyst corresponding to the formula where: R 20 is an aromatic or inertly substituted aromatic group containing from 5 to 20 atoms not counting hydrogen, or a polyvalent derivative thereof; T 3 is a hydrocarbylene or silane group having from 1 to 20 atoms not counting hydrogen, or an inertly substituted derivative thereof; M 3 is a Group 4 metal; G is an anionic, neutral or dianionic ligand group; g is a number from 1 to 5 indicating the number of G groups; and the lines and arrows represent bonds and electron donative interactions, respectively, (B) a second olefin polymerization catalyst that prepares polymers differing in chemical or physical properties from the polymer prepared by catalyst (A) under equivalent polymerization conditions, and (C) a chain shuttling agent.