Pressure pipes

US7799397B2 · kind B2 · utility

Assignee

• Borealis Technology Oy · FI

Inventors

• Karl Ebner
• Juergen Emig · Grasellenbach, DE
• Franz Ruemer · Zell am See, AT

Key dates

• Filing date: Nov 6, 2002
• Grant date: Sep 21, 2010
• Expiry date: Dec 11, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31855
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A pressure pipe with increased long-term pressure resistance is comprised of a polypropylene composition. The polypropylene composition is comprised of a polyproyplene copolymer which is at least partially crystallised in the β-modification.