Low-odor polyethylene blends

US6462135B1 · kind B1 · utility

Assignee

• Basell Polyolefine GmbH · DE

Inventors

• Wolfgang Rohde · Speyer, DE
• Peter Bauer · Ludwigshafen, DE
• Dieter Lilge · Schifferstadt, DE
• Martin Lux · Schifferstadt, DE
• Paulus De Lange · Wesseling, DE
• Guido Funk · Worms, DE

Key dates

• Filing date: Jan 17, 2001
• Grant date: Oct 8, 2002
• Expiry date: Jan 17, 2021

Classification

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

Abstract

In a low-odor polyethylene blend made from a high-molecular-weight ethylene copolymer obtainable by polymerization in the presence of a Ziegler catalyst and from a low-molecular-weight ethylene homopolymer or ethylene copolymer obtainable by polymerization in the presence of a chromocene catalyst on an oxidic support, the Al content of the high-molecular-weight component is from 5 to 60 mg/kg, the Al content of the low-molecular-weight component is from 0 to 5 mg/kg and the Al content of the blend is from 1 to 55 mg/kg. Processes are described for preparing blends of this type. Their use is described for producing moldings, in particular hollow articles and pipes. Moldings, in particular hollow articles and pipes, are produced from low-odor polyethylene blends.