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Cyclopentadienyl transition metal compounds, as polymerization catalysts

A technology based on cyclopentadienyl and transition metals, applied in metallocenes, organic chemistry, chemical instruments and methods, etc., can solve the problem of increasing the final cost of catalysts

Inactive Publication Date: 2001-07-04
WESTLAKE LONGVIEW
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This special handling adds to the final expense of these very expensive catalysts, making them less popular in industrial polymerization processes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] In this example, a stable isolatable complex was prepared by mixing 2.5 g (8.6 mmol) (2-dimethylaminoethyl) cyclopentadienyl titanium trichloride with 1.2 g (8.6 mmol) 2,6- Prepared by the reaction of lutidine-hydrogen chloride. The reaction was performed by first dissolving (2-dimethylaminoethyl)cyclopentadienyltitanium trichloride in 25 mL of dichloromethane, and then adding 2,6-lutidine-hydrogen chloride dry powder. The reaction was carried out at room temperature and continued for 15 minutes. Thereafter, an insoluble red-orange precipitate came out of solution. The red-orange precipitate was isolated by filtration, washed twice with 20 mL of dichloromethane and dried under vacuum. The yield of (2-dimethylaminoethyl)cyclopentadienyl titanium trichloride hydrochloride was 2.7 g (96%).

Embodiment 2

[0098] [ Four (3,5-bis-trifluoromethylphenyl)] sodium borate reaction and preparation. The reaction was carried out by first suspending (2-dimethylaminoethyl)cyclopentadienyl titanium trichloride hydrochloride in 20 mL of dichloromethane, and then adding [tetrakis(3,5-bistrifluoromethylbenzene Base)] sodium borate dry powder and completed. The reaction was carried out at room temperature for 1 hour. Thereafter, a fluorescent yellow solution containing NaCl precipitate was obtained. NaCl was removed by filtration and the solvent was removed from the mother liquor to give a flaky yellow solid. The solid was washed three times with 15 mL of pentane and dried under vacuum. 1.95 g (91%) were recovered to have the formula B[(3,5-CF 3 )C 6 h 3 ] 4 - [2-Me 2 N + (H)CH 2 CH 2 -C 5 h 4 ]TiCl 3 of yellow solid.

Embodiment 3

[0100] In this example, a stable isolatable complex was obtained by mixing 0.20 g (0.6 mmol) (2-dimethylaminoethyl) cyclopentadienyl titanium trichloride hydrochloride with 0.21 g (0.60 mmol) Prepared by the reaction of sodium phenyl borate. The reaction was carried out by first suspending (2-dimethylaminoethyl)cyclopentadienyltitanium trichloride hydrochloride in 15 mL of dichloromethane and then adding sodium tetraphenylborate dry powder. The reaction was carried out at room temperature for 1 hour. Thereafter, a yellow solution containing NaCl precipitate was obtained. NaCl was removed by filtration and the solvent was removed from the mother liquor to give a yellow solid. The solid was washed three times with 15 mL of pentane and dried under vacuum. 0.37 g (99%) was recovered to have the formula B (C 6 h 5 ) 4 - [2-Me 2 N + (H)CH 2 CH 2 -C 5 h 4 ]TiCl 3 of yellow solid.

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PUM

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Abstract

Disclosed are novel cyclopentadienyl transition metal compounds that are stable under a wide variety of conditions, particularly under conditions that include exposure to water and oxygen containing media. These novel compounds can be utilized in preparing novel catalyst systems useful in polymerizing olefins. The cyclopentadienyl compound can specifically be [(C5H4CH2CH2N[H]Me2)TiCl3]+B[C6F5]4-. Also disclosed are processes for preparing the novel cyclopentadienyl transition metal compounds.

Description

field of invention [0001] The present invention relates to novel cyclopentadienyl transition metal complexes; a method for producing cyclopentadienyl transition metal complexes; the use of cyclopentadienyl complexes in the preparation of catalyst systems; olefin polymerization or Copolymerization, and polymers produced therefrom. Background of the invention [0002] There are many processes for the polymerization or copolymerization of olefins such as ethylene and propylene. These methods traditionally utilize Ziegler-Natta catalyst systems. These catalyst systems comprise a transition metal complex (traditionally a halide or alkoxide of titanium, zirconium or vanadium) and a main group metal alkyl (usually an aluminum alkyl). Ziegler-Natta catalyst systems are heterogeneous and have many different active catalytic sites. Each of the different active sites has different properties resulting in different polymers, with the result that the Ziegler-Natta catalyst system prod...

Claims

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Application Information

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IPC IPC(8): C07F17/00C08F4/64C08F4/643C08F4/659C08F4/6592C08F10/00C08F110/02
CPCC08F4/65908Y10S526/943C08F110/02C07F17/00C08F4/65912C08F10/00C08F4/6592C08F2500/03
Inventor R·T·李L·G·麦库罗
Owner WESTLAKE LONGVIEW
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