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:
Mar. 13, 2001
Filed:
May. 04, 1999
Edwar S. Shamshoum, Houston, TX (US);
Margarito Lopez, Pasadena, TX (US);
B. Raghava Reddy, Baytown, TX (US);
Theodore G. Harris, Seabrook, TX (US);
Fine Technology, Inc., Houston, TX (US);
Abstract
The invention provides a polymerization process with improved catalyst activity of a metallocene catalyst supported on silica treated with MAO, a process for supporting a metallocene compound on silica treated with MAO, a metallocene catalyst supported on silica treated with MAO within a certain temperature range and a process for making a metallocene catalyst supported on silica treated with MAO. The invention includes supporting the metallocene compound on a MAO-treated silica at a temperature of below 0° C. The supported catalyst is activated with an aluminum alkyl. The catalyst may be prepolymerized in a tubular reactor prior to being introduced into the polymerization reaction zone.