Dow Global Technolgoies LLC

Ruddy Nicasy

Kalyan Sehanobish

Noorallah Jivraj

Patrick J Schouterden

Ravi S Dixit

Robert J Jorgensen

Sarat Munjal

Burkhard Eric Wagner

Frederik E Gemoets

Patrick J C Schouterden

Johan Vanvoorden

Peter F Van Den Berghen

Peter F M Van Den Berghen

Johan Vanveorden

Jozef J Van Dun

Jozef J VanDun

Peter F M Van Den Berghe

Frederick E L Gemoets

Jozef J Vandun

The present invention relates to a process of producing an ethylene polymer composition in multiple stages of which the first stage is a slurry polymerization stage, in the presence of a catalyst system comprising a) a solid catalyst precursor comprising a transition metal selected from titanium and vanadium; magnesium, a halide, optionally an electron donor, and a solid particulate material comprising an inorganic oxide, wherein the median particle diameter of the solid catalyst precursor based upon the total volume of solid catalyst precursor, D, is from 1 to 13 micrometers; and b) an organoaluminium compound.

Multistage process for producing ethylene polymer compositions

The invention relates to a polyethylene composition with a bimodal molecular weight distribution and articles made therefrom. The composition comprises a low-molecular-weight (LMW) ethylene homopolymer component and a homogeneous, high-molecular-weight (LMW) ethylene interpolymer component, wherein the LMW component is characterized as having a molecular weight distribution, MWD, of less than about 8. In some embodiments, the HMW component is characterized by a reverse comonomer distribution.

Bimodal polyethylene pipe composition and article made therefrom

The invention relates to a polyethylene composition with a bimodal molecular weight distribution and articles made therefrom, such as high topload blow moldings and transmission and distribution pipes. The composition comprises a low-molecular-weight (LMW) ethylene homopolymer component and a homogeneous, high-molecular-weight (HMW) ethylene interpolymer component, wherein the LMW component is characterized as having a molecular weight distribution, MWD , of less than about 8. The composition is characterized as having a bimodal molecular weight distribution, and a ductile-brittle transition temperature, T , of less than &minus;20&deg; C. In some embodiments, the HMW component is characterized by a reverse comonomer distribution.

Bimodal polyethylene composition and articles made therefrom

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Westerlo, Belgium

Ruddy Nicasy