Process for producing broader molecular weight distribution polymers with a reverse comonomer distribution and low levels of long chain branches

US8114946B2 · kind B2 · utility

Assignee

• Chevron Phillips Chemical Company LP · US

Inventors

• Qing Yang · Bartlesville, US
• Max P. McDaniel · Bartlesville, US
• Joel L. Martin · Bartlesville, US
• Tony R. Crain · Niotaze, US
• Randy S. Muninger · Canton, US
• Jerry T. Lanier · Bartlesville, US
• Jeff S. Fodor · Bartlesville, US
• Paul J. DesLauriers · Bartlesville, US
• Chung Ching Tso · Bartlesville, US
• David C. Rohlfing · Bartlesville, US

Key dates

• Filing date: Dec 18, 2008
• Grant date: Feb 14, 2012
• Expiry date: Dec 18, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2915
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention provides a polymerization process which is conducted by contacting an olefin monomer and at least one olefin comonomer in the presence of hydrogen and a metallocene-based catalyst composition. Polymers produced from the polymerization process are also provided, and these polymers have a reverse comonomer distribution, low levels of long chain branches, and a ratio of Mw/Mn from about 3 to about 6.