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:
Jan. 04, 2005
Filed:
Mar. 05, 2003
Shaotian Wang, Mason, OH (US);
Clifford C. Lee, Pearland, TX (US);
Mark P. Mack, West Chester, OH (US);
Gregory G. Hlatky, Morrow, OH (US);
Sandor Nagy, Naperville, IL (US);
Barbara M. Tsuie, Cincinnati, OH (US);
Craig C. Meverden, Mason, OH (US);
Shaotian Wang, Mason, OH (US);
Clifford C. Lee, Pearland, TX (US);
Mark P. Mack, West Chester, OH (US);
Gregory G. Hlatky, Morrow, OH (US);
Sandor Nagy, Naperville, IL (US);
Barbara M. Tsuie, Cincinnati, OH (US);
Craig C. Meverden, Mason, OH (US);
Equistar Chemicals, LP, Houston, TX (US);
Abstract
A process for making ethylene copolymers is disclosed. Ethylene copolymerizes with an α-olefin in the presence of a catalyst system comprising an activator and a silica-supported, bridged indenoindolyl metal complex having 'open architecture.' The supported complex incorporates comonomers with exceptional efficiency, and the process gives ethylene copolymers having high molecular weights (Mw>100K) and very low densities (<0.910 g/cm). Open architecture catalysts that include bridging through the indolyl nitrogen of the indenoindolyl framework are also described. Additionally, supported and unsupported indeno[1,2-b]indolyl catalysts provide exceptional activities in the preparation of elastomeric polypropylene and ethylene copolymers.