Higher density polyolefins with improved stress crack resistance

US9156970B2 · kind B2 · utility

Assignee

• Chevron Phillips Chemical Company LP · US

Inventors

• Mark L. Hlavinka · Tulsa, US
• Errun Ding · Bartlesville, US
• Paul J. DesLauriers · Bartlesville, US
• Yongwoo Inn · Bartlesville, US
• Lili Cui · Bartlesville, US
• Qing Yang · Bartlesville, US
• Ashish M. Sukhadia · Bartlesville, US
• Guylaine St. Jean · Bartlesville, US
• Richard M. Buck · Bartlesville, US

Key dates

• Filing date: Sep 5, 2013
• Grant date: Oct 13, 2015
• Expiry date: Sep 5, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2323/08
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Disclosed herein are polymerization processes for the production of olefin polymers. These polymerization processes can employ a catalyst system containing two or three metallocene components, resulting in ethylene-based copolymers that can have a medium density and improved stress crack resistance.