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AssigneeDow Global Technologies LLC
InventorsJozef J. Van Dun, Patrick J. Schouterden, Kalyan Sehanobish, Peter F.M. van den Berghe, Noorallah Jivraj, Johan Vanvoorden, Ravi S. Dixit, Ruddy Nicasy, Frederik E.L. Gemoets
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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, MWDL, of less than about 8. The composition is characterized as having a bimodal molecular weight distribution, and a ductile-brittle transition temperature, Tdb, of less than −20° C. In some embodiments, the HMW component is characterized by a reverse comonomer distribution.
A polyethylene composition comprising 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, MWDL, of less than about 8 and a weight average molecular weight, MwL, and wherein the polyethylene composition is characterized as having a bimodal molecular weight distribution, and a ductile-brittle transition temperature, Tdb, of less than −20° C.
A polyethylene composition comprising a low-molecular-weight (LMW) ethylene homopolymer component and a high-molecular-weight (HMW) ethylene interpolymer component, wherein the polyethylene composition is characterized as having a bimodal molecular weight distribution, the molecular weight distribution as defined by the ratio of Mw/Mn is about 30 or less, and the HMW component is characterized as having a reverse comonomer distribution.
Dependencies are inferred from the claim text.