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Ortho-metallated hafnium complexes of imidazole ligands

A technology of metal complexes and ligands, applied in the field of olefin polymerization

Inactive Publication Date: 2009-06-17
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] While these novel catalysts provide technological advances in the polyolefin industry, the usual problems remain, as well as new challenges associated with process operability

Method used

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  • Ortho-metallated hafnium complexes of imidazole ligands
  • Ortho-metallated hafnium complexes of imidazole ligands
  • Ortho-metallated hafnium complexes of imidazole ligands

Examples

Experimental program
Comparison scheme
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specific Embodiment approach

[0201] The following specific embodiments of the invention and combinations thereof are particularly desirable and are therefore described to provide a detailed disclosure of the appended claims.

[0202] 1. A metal complex corresponding to the following general formula:

[0203]

[0204] Wherein, X is an anionic ligand independently, or two X groups together form a dianionic ligand group or a neutral diene, preferably X is C 1-20 Hydrocarbyl, trihydrocarbylsilyl or trihydrocarbylsilylhydrocarbyl groups;

[0205] T is a cycloaliphatic or aromatic group containing one or more rings;

[0206] R 1 are independently hydrogen, halogen, or monovalent, polyatomic anionic ligands, or two or more R 1 The groups bond together thus forming a polyvalent fused ring system;

[0207] R 2 are independently hydrogen, halogen, or monovalent, polyatomic anionic ligands, or two or more R 2 The groups are joined together to form a polyvalent fused ring system; and

[0208] R 4 is hydrog...

Embodiment 1

[0257] Example 1[N-[2,6-bis(1-methylethyl)phenyl]-α-[2,4,6-three(1-methylethyl)phenyl]-5-(2 -Ethylbenzofuran-3,4-diyl-κ-C 4 )-2-(N'-methyl)imidazol-2-yl)methanamine (2-)-kN 1 , κN 2 ] Di(methyl)hafnium

[0258]

[0259] (a) In a 250 mL flask with magnetic stirring, 100 mL of diethyl ether and 2-ethylbenzofuran (20.0 g, 137 mmol) were added. The reaction flask was then cooled to 0 °C. Bromine (8.40 mL, 164 mmol) was then added to the dropping funnel containing 50 mL of ethyl acetate. The mixture was added dropwise into the reactor maintaining a temperature of 0 °C. An additional 20 mL of ethyl acetate was used to rinse the dropping funnel. The resulting mixture was stirred for 2 hours keeping the temperature at 0 °C. The reaction was quenched with 50 mL of water. The contents of the reactor were then transferred to a 1 L separatory funnel and rinsed with 2 x 50 mL of water. The organic layers were combined and washed with 200 mL of saturated sodium thiosulfate solut...

Embodiment 2

[0273] Example 2[N-[2,6-bis(1-methylethyl)phenyl]-α-[2,4,6-three(1-methylethyl)phenyl]-5-(2 -Ethylbenzofuran-3,4-diyl-κ-C 4 )-2-(N′-methyl)imidazol-2-yl)methanamine (2-)-κN 1 , κN 2 ] Di(n-butyl) hafnium

[0274]

[0275] (a) 2-(1) N-methylimidazole methylamine, N-[2,6-bis(1-isopropyl)phenyl]-α-[2,4,6-(triisopropyl )Phenyl]4-3(2-ethylbenzofuran) (Example 1(f), 0.81 mmol dissolved in 20 mL toluene) was charged into a glass flask. To this solution was added 0.81 mmol of n-butyllithium (2.5M solution in hexane) via syringe. The solution was stirred for 30 minutes and the toluene was removed using a vacuum system attached to the dry box. Hexane was added and removed in vacuo, added again, and the resulting slurry was filtered to form the lithium salt as a white solid (0.20 g, 0.32 mmol; 40%). A glass jar was then filled with the white solid dissolved in 30 mL of toluene. To this solution was added 0.32 mmol of solid HfCl 4 . The flask was capped using an air-cooled ref...

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Abstract

Hafnium complexes of heterocyclic organic imidazol-2-yl ligands containing internal orthometallation and the use thereof as components of olefin polymerization catalyst compositions, especially supported catalyst compositions, are disclosed.

Description

[0001] cross-reference statement [0002] This application claims the benefit of US Provisional Application 60 / 798,068, filed May 5, 2006, and US Provisional Application 60 / 845,624, filed September 19, 2006. Background technique [0003] The present invention relates to certain hafnium complexes, to catalyst compositions comprising the hafnium complexes, and to the addition of the hafnium complexes as a component of coordination polymerization catalyst compositions, especially supported catalyst compositions Polymerization processes, especially olefin polymerization processes. [0004] Advances in polymerization and catalysis have led to the production of many new polymers with improved physical and chemical properties suitable for a wide range of advanced products and applications. With the advancement of new catalysts, the choice of the type of polymerization (solution, slurry, high pressure or gas phase) used to prepare a particular polymer has been greatly expanded. Like...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/00C08F10/00C08F210/00C08F4/659
CPCC07F7/00C08F110/14C07F7/006C08F10/00C07F7/003C08F4/64144C08F2500/20C08F2500/03C08F210/00
Inventor H·W·布恩J·N·科尔特三世K·A·弗雷泽C·N·艾弗森I·M·芒罗K·P·皮尔P·C·沃斯泽皮卡
Owner DOW GLOBAL TECH LLC
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