Polyethylene for rotomoulding
AssigneeBasell Polyolefine GmbH
InventorsGerd Mannebach, Heinz Vogt, Fabiana Fantinel, Shahram Mihan, Peter Bisson, Cees Besems, Gerhardus Meier, Ulf Schüller, Barbara Gall, Iakovos Vittorias, Manfred Hecker, Michael Olmscheid
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Abstract
A novel polyethylene is devised which polyethylene is particularly advantageous for manufacturing rotomoulded articles.
Claims23
A polyethylene homo- and/or copolymer, wherein the copolymer is a copolymer of ethylene with C3-C20-alkene, the polyethylene having a composition distribution breadth index from 20 to 50%, a molar mass distribution width Mw/Mn from 7 to 15, a density from 0.938 to 0.942 g/cm3, a weight average molar mass Mw from 20,000 g/mol to 500,000 g/mol, a melt index from 4 to 5.5 g/10 min, measured at 190° C. with a load of 2.16 kg, and a high load melt index between 125 and 230 g/10 min, measured at 190° C. with a load of 21.6 kg.
The polyethylene according to 4 wherein the C3-C20-alkene is a C3-C12-1-alkene.
A rotomoulded article or object, comprising a polyethylene homo- and/or copolymer, wherein the copolymer is a copolymer of ethylene with C3-C20-alkene, the polyethylene having a composition distribution breadth index from 20 to 50%, a molar mass distribution width Mw/Mn from 7 to 15, a density from 0.938 to 0.942 g/cm3, a weight average molar mass Mw from 20,000 g/mol to 500,000 g/mol, a melt index from 4 to 5.5 g/10 min, measured at 190° C. with a load of 2.16 kg, and a high load melt index between 125 and 230 g/10 min, measured at 190° C. with a load of 21.6 kg.
Dependencies are inferred from the claim text.