Blend of bimodal polyethylene with unimodal ultra high molecular weight polyethylene with improved mechanical properties

US9783661B2 · kind B2 · utility

Assignee

• Borealis AG · AT

Inventors

• Qizheng Dou · Linz, DE
• Alexandra Romina Albunia · Linz, AT
• Yi Liu · Linz, AT

Key dates

• Filing date: Feb 6, 2015
• Grant date: Oct 10, 2017
• Expiry date: Feb 6, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2207/068
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

High density polyethylene blend, comprising (A) 55 to 99 wt % of a high density multimodal polyethylene component having a density of at least 930 kg/m3, and (B) 1 to 45 wt % of an ultra-high molecular weight polyethylene homo- or copolymer component having (i) an intrinsic viscosity of at least 15.0 dl/g (ii) an a nominal viscosity molecular weight (Mv) of at least 2.0*106 g/mol and (iii) a molecular weight of (Mw) of at least 0.7*106 g/mol, and wherein said blend has an MFR21 of 0.05 to 10.0 g/10 min and a density of at least 925 kg/m3.