Low density polyolefin resins with low molecular weight and high molecular weight components, and films made therefrom

US9181370B2 · kind B2 · utility

Assignee

• Chevron Phillips Chemical Company LP · US

Inventors

• Ashish M. Sukhadia · Bartlesville, US
• Max P. McDaniel · Bartlesville, US
• Errun Ding · Bartlesville, US
• Guylaine St. Jean · Bartlesville, US
• Qing Yang · Bartlesville, US
• Daniel G. Hert · Owasso, US
• Chung Ching Tso · Bartlesville, US

Key dates

• Filing date: Nov 6, 2013
• Grant date: Nov 10, 2015
• Expiry date: Jan 16, 2034

Classification

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

Abstract

Disclosed herein are ethylene-based polymers produced using dual metallocene catalyst systems. These polymers have low densities, high molecular weights, and broad molecular weight distributions, as well as having the majority of the long chain branches in the lower molecular weight component of the polymer, and the majority of the short chain branches in the higher molecular weight component of the polymer. Films produced from these polymers have improved impact and puncture resistance.