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. 16, 2007
Filed:
Jun. 22, 1990
JO Ann Marie Canich, Webster, TX (US);
Howard William Turner, Webster, TX (US);
Gregory George Hlatky, Houston, TX (US);
Jo Ann Marie Canich, Webster, TX (US);
Howard William Turner, Webster, TX (US);
Gregory George Hlatky, Houston, TX (US);
ExxonMobil Chemical Patents Inc., Houston, TX (US);
Abstract
This invention relates to a catalyst system for the production of polyolefins comprising: (A) a Group IV B transition metal component represented by one of the two general formulae wherein (CHR) is a cylopentadienyl ring (JR') is a heteroatom ligand in which J is an element with a coordination number of three from Group V-A or an element with a coordination number of two rom Group VI-A of the Periodic Table of Elements, each Q is independently, hydride, C—Chydrocarbyl radicals, substituted hydrocarbyl radials wherein one or more hydrogen atoms is replaced by an electron withdrawing group, or C—Chydrocarbyl-substituted metalloid radicals wherein the metalloid is selected from the group consisting of germanium and silicon, provided that Q is not a substituted or unsubstituted cyclopentadienyl ring, or both Q together may be an alkylidene, olefin, acetylene or a cyclometallated hydrocarbyl; 'y' is 0 or 1; when 'y' is 1, T is a covalent bridging group containing a Group IV-A or V-A element; L is a neutral Lewis base; and “w” is a number from 0 to 3; (B) an activator compound comprising (1) a cation; and (2) a compatible noncoordinating anion.