Polyethylene for injection moldings

US7928051B2 · kind B2 · utility

Assignee

• Basell Polyolefine GmbH · DE

Inventors

• Jennifer Kipke · Frankfurt, DE
• Shahram Mihan · Bad Soden, DE
• Rainer Karer · Kaiserslautern, DE
• Dieter Lilge · Schifferstadt, DE

Key dates

• Filing date: Apr 25, 2005
• Grant date: Apr 19, 2011
• Expiry date: May 19, 2027

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/1345
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polyethylene which comprises ethylene homopolymers and/or copolymers of ethylene with 1-alkenes and has a molar mass distribution width Mw/Mn of from 3 to 30, a density of from 0.945 to 0.965 g/cm3, a weight average molar mass Mw of from 50 000 g/mol to 200 000 g/mol, a HLMI of from 10 to 300 g/10 min and has from 0.1 to 15 branches/1000 carbon atoms, wherein the 1 to 15% by weight of the polyethylene having the highest molar masses have a degree of branching of more than 1 branch of side chains larger than CH3/1000 carbon atoms, a process for its preparation, catalysts suitable for its preparation and also injection moldings in which this polyethylene is present.