Patent ID: 8362162

Claim:
A process for producing an ethylene/α-olefin interpolymer composition comprising: (a) selecting a single suitable pre-catalyst comprising at least one metal-aryl or metal-hydrocarbyl bond, wherein each pre-catalyst molecule is essentially the same as every other pre-catalyst molecule; (b) contacting a concentration of ethylene and an α-olefin with said suitable pre-catalyst, the concentration comprising an α-olefin mole fraction, f 2 , defined as f 2 = [ α ⁢ - ⁢ olefin ] ∑ [ ethylene + α ⁢ - ⁢ olefin ] ; (c) activating the pre-catalyst to produce an ethylene-inserted cation and an α-olefin-inserted cation; (d) forming, with the cations, under continuous reaction polymerization conditions an ethylene/α-olefin interpolymer composition with a bimodal molecular weight distribution and comprising a high molecular weight component and a low molecular weight component; and (e) controlling the amount of high molecular weight component by controlling the value of f2.