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:
May. 15, 2012
Filed:
Jan. 12, 2011
Timothy D. Shaffer, Hackettstown, NJ (US);
Michael F. Mcdonald, Kingwood, TX (US);
David Y. Chung, Bellaire, TX (US);
Robert N. Webb, Kingwood, TX (US);
Deborah J. Davis, Pasadena, TX (US);
Pamela J. Wright, Easton, PA (US);
Timothy D. Shaffer, Hackettstown, NJ (US);
Michael F. McDonald, Kingwood, TX (US);
David Y. Chung, Bellaire, TX (US);
Robert N. Webb, Kingwood, TX (US);
Deborah J. Davis, Pasadena, TX (US);
Pamela J. Wright, Easton, PA (US);
ExxonMobil Chemical Patents Inc., Houston, TX (US);
Abstract
The disclosure provides for a process and polymerization system to produce isoolefin polymers () utilizing polymorphogenates () in the catalyst system to control polydispersity (MWD). The disclosure also provides a catalyst system () comprising a plurality of active catalyst complex species () formed by combination of a Lewis acid (), an initiator () and a polymorphogenate (), as well as polymers made using the catalyst system or process. The polymorphogenate () can promote or mimic the formation of different active catalyst complex species () having different polymerization rates, i.e. different rates of propagation, chain transfer, or termination, as observed by different polydispersities resulting from the presence of relatively different proportions of the polymorphogenate.