Patent · US Active

Multimodal polyethylene molding composition for producing pipes having improved mechanical properties

US9051458B2 · kind B2 · utility

8Cited by

50References

4Claims

0Family size

Assignee

Basell Polyolefine GmbH · DE

Inventors

Joachim Berthold · Prien am Chiemsee, DE
Hansjörg Nitz · Frankfurt, DE
Werner Rothhöft · Liederbach am Taunus, DE
Heinz Vogt · Ludwigshafen, DE

Key dates

Filing date	Aug 17, 2006
Grant date	Jun 9, 2015
Priority date	—
Expiry date	Oct 21, 2026

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/52
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A polyethylene molding composition having a multimodal molecular mass distribution and comprising from 45 to 55% by weight of a low molecular weight ethylene homopolymer A, from 20 to 40% by weight of a high molecular weight copolymer B comprising ethylene and another olefin having from 4 to 8 carbon atoms and from 15 to 30% by weight of an ultrahigh molecular weight ethylene copolymer C can be prepared in the presence of a Ziegler catalyst in a three-stage process and is highly suitable for producing pipes having excellent mechanical properties.

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