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:
Oct. 30, 2012
Filed:
Sep. 15, 2010
William Gauthier, Houston, TX (US);
David Rauscher, Angleton, TX (US);
Jun Tian, League City, TX (US);
Nathan Williams, Webster, TX (US);
William Gauthier, Houston, TX (US);
David Rauscher, Angleton, TX (US);
Jun Tian, League City, TX (US);
Nathan Williams, Webster, TX (US);
Fina Technology, Inc., Houston, TX (US);
Abstract
Method employing a supported metallocene catalyst composition in the production of an isotactic ethylene propylene co-polymer. The composition comprises a metallocene component supported on a particulate silica support having average particle size of 10-40 microns, a pore volume of 1.3-1.6 ml/g, a surface area of 200-400 m/g. An alkylalumoxane cocatalyst component is incorporated on the support. The isospecific metallocene is characterized by the formula:B(CpRaRb)(FlR')MQ  (1)or by the formula:B′(Cp′R′aR′b)(Fl′)M′Q′  (2)In the formulas Cp and Cp′ are substituted cyclopentadienyl groups, Fl and Fl′ are fluorenyl groups, and B and B′ are structural bridges. R′ are substituents at the 2 and 7 positions, Ra and R′a are substituents distal to the bridge, and Rb and R′b are proximal to the bridge. M and M′ are transition metals, Q′ is a halogen or a C-Calkyl group; and n′ is an integer of from 0-4.