Patent · US Active

Singlelayer and multilayer polyolefin foam pipes

US7462307B2 · kind B2 · utility

14Cited by

2References

17Claims

0Family size

Assignee

Borealis AG · AT

Inventors

Achim Hesse · Dresden, DE
Tony Lindstroem · Bleket, SE
Carl-Gustaf Ek · Mölndal, SE
Cecilia Rydin · Ayacucho, PE
Allan Boye Hansen · Sandefjord, NO

Key dates

Filing date	Jan 10, 2006
Grant date	Dec 9, 2008
Priority date	—
Expiry date	May 19, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/249993
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

Process for producing single layer and multilayer polyolefin foam pipes with improved compression resistance having a polyolefin foam layer which consists of mixtures of modified propylene polymers having strain hardening behaviour or propylene homopolymers with a stereospecificity index >98% or propylene copolymers with a stereospecificity index of the homopolymer matrix of >96%. The polyolefin foam pipes include coated steel pipes for transporting crude oil or gas products or district heating applications, single layer pipes for insulation purposes and for non- or low-pressure applications and multilayer plastic pipes for the transportation of hot or cold fluids.

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