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Linked Cyclopentadienyl-Dicarbollide Complexes of Titanium, Zirconium and Hafnium

Summary

Derivatives of novel carbon bridged cyclopentadienyl-dicarbollide complexes of titanium, zirconium and hafnium display a very high activity as ethylene polymerization catalysts in the absence of a cocatalyst. This invention relates to novel group 4 metallocene catalysts bearing linked cyclopentadienyl-dicarbollide ligands. They are very active single component catalysts for olefin polymerization. 6The activity is 4.64 x 10 g of PE/(mol of Zr atom h) in the absence of any cocatalyst, which is comparable to conventional metallocenes upon activation with a large excess MAO. The advantage of our catalysts is single component (without cocatalyst), high activity, and high thermal stability. There is a possibility for these catalysts to be used in chemical industry without alteration of existing plant.

Supplementary Information

Inventor: Xie, Zuowei | Wang, Yaorong | Cai, Yuepeng
Priority Number: US7232870B2
IPC Current: C08F000464 | C07F001700 | C08F000406 | C08F00046192 | C08F001000 | C08F0004659 | C08F011002
US Class: 526134 | 502152 | 502158 | 502202 | 526170 | 556007 | 556008 | 556053 | 568003
Assignee Applicant: The Chinese University of Hong Kong
Title: Bridged metallocene complexes, process for preparing the same and use thereof
Usefulness: Bridged metallocene complexes, process for preparing the same and use thereof
Summary: The bridged cyclopentadienyl-dicarbollide metallocene complex is for contacting with olefin monomer(s), i.e. ethylene or α-olefin, useful for olefin polymerization (claimed). It is used as a single component of Ziegler-natta catalysts in chemical industry. It is useful for polyethylene used in food packaging, coatings, countless molded toys, and other household items. It is used to replace common materials, such as glass, metal, paper, and concrete. α-Olefin includes propylene, butane-1, petene-1, and hexane-1.
Novelty: New bridged cyclopentadienyl-dicarbollide metallocene complex of specific formula, for contacting with olefin monomer(s), i.e. ethylene or alpha-olefin, for olefin polymerization, and used as single component of ziegler-natta catalysts

Industry

Chemical/Material

Sub Category

Chemical/Material Application

Application No.

04/SCI/162

Others

Inventor(s): Professor XIE Zuowei, Department of Chemistry

Patent Status: US Patent Allowed

Country/Region

Hong Kong