The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 25, 2007
Filed:
Aug. 03, 2005
Shaotian Wang, Mason, OH (US);
Barbara M. Tsuie, Cincinnati, OH (US);
Mark P. Mack, West Chester, OH (US);
Edward S. Vargas, Loveland, OH (US);
Debra L. Beran, Cincinnati, OH (US);
Shaotian Wang, Mason, OH (US);
Barbara M. Tsuie, Cincinnati, OH (US);
Mark P. Mack, West Chester, OH (US);
Edward S. Vargas, Loveland, OH (US);
Debra L. Beran, Cincinnati, OH (US);
Equistar Chemicals, LP, Houston, TX (US);
Abstract
Methods for making polyolefins are disclosed. One method comprises polymerizing an olefin in the presence of a catalyst system comprising a single-site complex, an agglomerated metal oxide/clay support-activator, and an ionic borate. Including an ionic borate with the support-activator provides an unexpected boost in catalyst activity and gives polyolefins with high molecular weight and improved comonomer incorporation. In another method of the invention, an olefin is polymerized in the presence of an indenoindolyl metal alkylated complex and an agglomerated metal oxide/clay support-activator. Use of alkylated indenoindolyl complexes with the support-activators provides improved activity compared with metal halides.