Patent ID: 7645835

Claim:
A process for forming a polymer blend composition, which process comprises: (I) preparing an ethylene homopolymer by a process, which process comprises polymerizing ethylene under slurry process conditions with a catalyst comprising; i) a supported catalyst component resulting from admixing: (A) a support material; (B) an organometal compound comprising a metal selected from Groups 2-13 of the Periodic Table of the Elements, germanium, tin, or lead; (C) an activator compound containing a cation which is capable of reacting with a transition metal compound to form a catalytically active transition metal complex, and a compatible anion having up to 100 nonhydrogen atoms and containing at least one substituent comprising an active hydrogen moiety; and (D) a transition metal compound; or ii) a supported catalyst component resulting from admixing (A) a support material and an alumoxane which component contains 15 to 40 weight percent of aluminum, based on the total weight of the support material and alumoxane, which is obtained by; (a) heating said support material and alumoxane under an inert atmosphere for a period and at a temperature sufficient to fix alumoxane to the support material, to provide a supported catalyst component wherein not more than about 10 percent aluminum present in the supported catalyst component is extractable in a one-hour extraction with toluene at 90° C. using about 10 ml toluene per gram of supported catalyst component; and (b) optionally, subjecting the product produced in step (a) to one or more wash steps to remove alumoxane not fixed to the support material; and (B) a transition metal compound; or iii) any combination of (i) and (ii); (II) contacting under polymerization conditions a feedstream comprising ethylene, optionally at least one α-olefin comonomer, and an ethylene polymerization catalyst, to form (B) an ethylene homopolymer or ethylene/α-olefin interpolymer; and (III) combining the ethylene homopolymer (A) with the ethylene homopolymer or ethylene/α-olefin interpolymer (B) to form (C) the polymer blend composition.