Polyethylene pipe resins and production thereof

US7037977B2 · kind B2 · utility

Assignees

• Solvay Polyolefins Europe-Belgium (Societe Anonyme) · US
• Total Petrochemicals Research Feluy · BE

Inventors

• Olivier Miserque · Court-Saint-Etienne, BE
• Jacques Michel · Limeil-Brévannes, FR
• Marc Dupire · Hyon, BE
• Fabian Siberdt · Brussels, BE
• Jean-Louis Costa · Grimbergen, BE
• Serge Bettonville · Ougrée, BE

Key dates

• Filing date: Oct 25, 2001
• Grant date: May 2, 2006
• Expiry date: Oct 25, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2308/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A polyethylene resin comprising a blend of from 35 to 49 wt % of a first polyethylene fraction of high molecular weight and 51 to 65 wt % of a second polyethylene fraction of low molecular weight, the first polyethylene fraction comprising a linear low density polyethylene having a density of up to 0.928 g/cm3, and an HLMI of less than 0.6 g/10 min and the second polyethylene fraction comprising a high density polyethylene having a density of at least 0.969 g/cm3, and an MI2 of greater than 100 g/10 min, and the polyethylene resin, having a density of greater than 0.951 g/cm3 and an HLMI of from 1 to 100 g/10 min.