Olefin polymerization process

US6617403B2 · kind B2 · utility

Assignee

• Phillips Petroleum Company · US

Inventors

• Ashish M. Sukhadia · Bartlesville, US
• Elizabeth A. Benham · Bartlesville, US
• Joseph Bergmeister, III · Bartlesville, US
• Rex L. Bobsein · Bartlesville, US
• Gerhard Guenther · Seabrook, US
• Eric T. Hsieh · Bartlesville, US
• Max P. McDaniel · Bartlesville, US
• Steven J. Secora · Bartlesville, US
• Joseph S. Shveima · Bartlesville, US
• John D. Stewart · Friendswood, US

Key dates

• Filing date: Aug 20, 2001
• Grant date: Sep 9, 2003
• Expiry date: Aug 20, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F210/16
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A copolymer of ethylene and a higher alpha-olefin having broadened melt processing windows and reduced melt fracture can be produced using a chromium-containing catalyst system and a trialkyl boron cocatalyst. The polymerization process must be carefully controlled to produce a copolymer resin that easily can be made into articles of manufacture.