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:
Apr. 10, 2012
Filed:
Jul. 22, 2009
Sandor Nagy, Naperville, IL (US);
Linda N. Winslow, Cincinnati, OH (US);
Shahram Mihan, Bad Soden, DE;
Reynald Chevalier, Frankfurt, DE;
Lenka Lukesova, Frankfurt, DE;
Ilya E. Nifant'ev, Moscow, RU;
Pavel V. Ivchenko, Moscow, RU;
Karen L. Neal-hawkins, Cincinnati, OH (US);
Sandor Nagy, Naperville, IL (US);
Linda N. Winslow, Cincinnati, OH (US);
Shahram Mihan, Bad Soden, DE;
Reynald Chevalier, Frankfurt, DE;
Lenka Lukesova, Frankfurt, DE;
Ilya E. Nifant'ev, Moscow, RU;
Pavel V. Ivchenko, Moscow, RU;
Karen L. Neal-Hawkins, Cincinnati, OH (US);
Equistar Chemicals, LP, Houston, TX (US);
Abstract
A method of preparing supported catalysts useful for olefin polymerization is described. The catalysts comprise a Group 4 metal complex that incorporates a tridentate dianionic ligand. An activator mixture is first made from a boron compound having Lewis acidity and an excess of an alumoxane. The activator mixture is then combined with a support and the Group 4 metal complex to give a supported catalyst. The method provides an active, supported catalyst capable of making high-molecular-weight polyolefins.