Patent · US Active

Polymerization catalysts for producing polymers with low levels of long chain branching

US7470758B2 · kind B2 · utility

41Cited by

29References

18Claims

0Family size

Assignee

Chevron Phillips Chemical Company LP · US

Inventors

Michael D. Jensen · Bartlesville, US
Joel L. Martin · Bartlesville, US
Max P. McDaniel · Bartlesville, US
David C. Rolfing · Bartlesville, US
Qing Yang · Bartlesville, US
Matthew G. Thorn · Lebanon, US
Ashish M. Sukhadia · Bartlesville, US
Youlu Yu · Bartlesville, US
Jerry T. Lanier · Bartlesville, US

Key dates

Filing date	Dec 1, 2006
Grant date	Dec 30, 2008
Priority date	—
Expiry date	Jan 24, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S526/943
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

This invention relates to catalyst compositions, methods, and polymers encompassing a Group 4 metallocene with bridging η5-cyclopentadienyl-type ligands, in combination with a cocatalyst and an activator-support. The compositions and methods disclosed herein provide ethylene polymers with low levels of long chain branching.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.