Patent · US Active

Peroxide crosslinked ethylene polymer pressure pipe and a method for the preparation thereof

US8968851B2 · kind B2 · utility

1Cited by

4References

16Claims

0Family size

Assignee

Borealis Technology Oy · FI

Inventors

Philipp Walter · Riegelsberg, DE
Anneli Pakkanen · Västerskog, FI
Jeroen Oderkerk · Stenungsund, SE
Magnus Palmlöf · Svenljunga, SE
Lars Hojer · Ytterby, SE
Bill Gustafsson · Stenungsund, SE
Tore Dreng · Larvik, NO

Key dates

Filing date	Mar 8, 2005
Grant date	Mar 3, 2015
Priority date	—
Expiry date	Aug 5, 2028

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/139
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A peroxide crosslinked ethylene polymer pressure pipe and a method for the preparation thereof are described. The pipe is characterized in that it comprises an ethylene polymer with a density of less than 950 kg/m3 obtained by polymerization with a single-site catalyst and having a shear thinning index, SHI5/300 of less than 20 and a MWD of <10. The method is characterized in that it comprises polymerizing ethylene, optionally together with at least one comonomer, with a single-site catalyst to provide the above defined ethylene polymer, forming the ethylene polymer into a pipe by extrusion and crosslinking it.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.