Polymer for cable jacket
AssigneeBorealis AG
InventorsAnna Hjärtfors, John Jamieson, Ravindra Tupe, Pauli Leskinen
Life of this patent
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Abstract
A multimodal polyethylene composition having a lower molecular weight (LMW) ethylene homo or copolymer component (A) and a higher molecular weight ethylene copolymer component (B); wherein the LMW component comprises two fractions (ai) and (aii); wherein the polymer composition has a density of 930 kg/m3 or more (ISO1183), such as 938 to 955 kg/m3, an MFR2 (ISO1133 at 190° C. and 2.16 kg load) in the range of 0.05 to 10 g/10 min, a flex modulus of up to 800 MPa (ISO 178:2010), such as 300 to 800 MPa (ISO 178:2010) and a taber abrasion resistance of 8.0 to 13.0 mg/1000 cycle (ASTM D 4060: 2014).
Claims20
A multimodal polyethylene composition having:
- (A) a lower molecular weight (LMW) ethylene homo or copolymer component;
- and
- (B) a higher molecular weight ethylene copolymer component;
- wherein the LMW component comprises two fractions (ai) and (aii);
- wherein each fraction (ai) and (aii) of the lower molecular weight ethylene homo or copolymer component (A) forms at least 12 wt % of the multimodal polyethylene composition;
- wherein component (B) forms at least 40 wt % of the multimodal polyethylene composition;
- wherein the multimodal polyethylene composition has a density of 930 kg/m3 or more (ISO1183), an MFR2 (ISO1133 at 190° C. and 2.16 kg load) in the range of 0.05 to 10 g/10 min, a flex modulus of up to 800 MPa (ISO 178:2010), and a taber abrasion resistance of 8.0 to 13.0 mg/1000 cycle (ASTM D 4060:2014);
- and
- wherein the multimodal polyethylene composition has a Mw/Mn (MWD) of 5 to 15 (measured by GPC).
Dependencies are inferred from the claim text.