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Catalyst system for olefin polymerization and polymers produced therefrom

A catalyst, metallocene compound technology, applied in the field of polymerized olefins

Inactive Publication Date: 2010-03-24
EXXONMOBIL CHEM PAT INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] US 5 723 399 describes the polymerization of olefins using variou

Method used

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  • Catalyst system for olefin polymerization and polymers produced therefrom
  • Catalyst system for olefin polymerization and polymers produced therefrom
  • Catalyst system for olefin polymerization and polymers produced therefrom

Examples

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Example

[00104] Toluene, tetrahydrofuran, fluorobenzene, diphenylamine, and potassium cyanide were purchased from Aldrich Chemical Company. Chromium trichloride was purchased from Strem. Grace Davison 948 silica was obtained from Grace Davison.

Polymerization process

1. K (THF) n N(C 6 h 5 ) 2

[00105] 30.0 g of diphenylamine was dissolved in 300 ml of tetrahydrofuran. The solution was cooled to -35°C. 7.14 g of potassium cyanide were added in small portions over several hours with the aid of a spatula. After gas evolution had ceased, the solvent was removed and the resulting solid was dried under vacuum overnight.

2.Cr(N(C 6 h 5 ) 2 ) 3

[00106] The K (THF) of 10.03g n N(C 6 h 5 ) 2 Dissolve in tetrahydrofuran (120ml). The solution was cooled to -35°C. 1.91 g of chromium trichloride was added to the reaction vessel. The resulting slurry was allowed to stir overnight at room temperature. The solution was removed under vacuum. About 150 ml of fluoroben...

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Abstract

This invention relates to a catalyst system comprising: an activator, such as an aluminum alkyl, alumoxane or combinations thereof; a first catalyst precursor prepared by contacting compound (I) represented by the formula: with an optionally substituted alkyl or optionally substituted aryl alcohol; wherein Z-O is a support material, where O is oxygen and Z is Si, Ti, Al, Sn, Fe, Ga, Zr, B, Mg or Cr; each X is, independently, nitrogen, oxygen phosphorous, or sulfur, provided that both X's are not each oxygen; each n is, independently, 1 or 2, provided the total of n = 3; each R is, independently, an alkyl group, a substituted alkyl group, an aryl group, or a substituted aryl group, provided at least one R group is an aryl or substituted aryl group; and a second catalyst precursor, wherein the second catalyst precursor is a metallocene compound. This invention also relates to the use of the above catalyst system to polymerize olefins and other monomers.

Description

[0001] priority claim [0001] This application claims priority to US Provisional Application No. 60 / 930,433, filed May 16, 2007. Cross-references to related applications [0002] This application is related to USSN 11 / 589,499, filed October 30, 2006, which claims the benefit and priority of USSN 60 / 737,595, filed November 17, 2005. field of invention [0003] The present invention relates to a catalyst system comprising a chromium precursor, a metallocene precursor and an activator, and a method for polymerizing olefins using the catalyst system. The invention also relates to the polymers thus obtained. Background of the invention [0004] Olefin polymerization catalysts have great utility in industry. There is thus a great interest in discovering new catalyst compounds, especially compounds which can be easily supported and / or modified by changing ligands. There is also a need to reduce catalyst costs by developing catalyst systems that efficiently utilize simple alum...

Claims

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Application Information

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IPC IPC(8): C08F4/659C08F10/00C08F4/69C08F4/02
CPCY10S526/943C08F210/16C08F4/65925C08F10/00C08F4/65912C08F4/65927C08F4/69C08F4/025C08F4/65916C08F210/14C08F2500/04
Inventor M·W·霍尔特坎普
Owner EXXONMOBIL CHEM PAT INC
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