Polyethylenzusammensetzung mit Verbessertem Mechanischem Leistungsgleichgewicht

Details

Veröffentlichungs-Nr.

EP4800062

Anmeldetag

28. Februar 2025

Veröffentlichung

2. September 2026

Rechtsraum

EP

IPC

C08L23/0807, // C08L23/06

Abstract

The present invention relates to a high density polyethylene composition, comprising (A) from 60 to 97 wt.-%, based on the total weight of the high density polyethylene composition, of a high density multimodal polyethylene copolymer having a polymer density of at least 950 kg/m³ and a MFR₅ determined according to ISO 1133 (190 °C, 5 kg) of not more than 0.50 g/10 min, and (B) from 3 to 40 wt.-%, based on the total weight of the high density polyethylene composition, of an ultra-high molecular weight polyethylene homopolymer having a nominal viscosity molecular weight Mv of 2,000,000 to 5,000,000 g/mol different from component (A); and wherein said high density multimodal polyethylene copolymer (A) comprises a copolymer of ethylene with at least one alpha olefin comonomer having from 4 to 12 carbon atoms, and said high density polyethylene composition has an MFR₂₁ of 3.0 g/10 min or less and a density of at least 958 kg/m³ including pigments, if present. The invention further relates to a process for the preparation of the above high density polyethylene composition and to an article, preferably a pipe or a pipe fitting comprising the high density polyethylene composition.

Anmelder

Firma

Borealis GmbH

Land

🇦🇹 Österreich

Fachgebiete