Patent ID: 7601783
Filing Date: 2009-10-13
Classification: C08F

Abstract:
1. A method of making polyolefin with a target flow index and melt flow ratio, comprising: contacting one or more olefinic monomers in a single reactor containing a bicomponent catalyst system comprising a first catalyst component and a second catalyst component, wherein the bicomponent catalyst system comprises two different Ziegler-Natta catalysts each characterized by a catalyst productivity and a chain-transfer-agent response; the single reactor being characterized by a chain-transfer-agent concentration and a temperature; the productivity of the second catalyst component having a substantially different temperature dependence than that of the first catalyst component; the chain-transfer-agent response of the second catalyst component having a substantially different sensitivity than that of the first catalyst component; effectuating the polymerization of the olefinic monomers to produce an olefin polymer characterized by a flow index, I