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Ligand of catalyzer for olefinic polymerization and transition metal complex

A technology for olefin polymerization and transition metal, applied in the application field of olefin polymerization catalyst in olefin polymerization, can solve the problems of affecting polymer processing performance, restricting polymer application field, narrow molecular weight distribution, etc.

Inactive Publication Date: 2004-03-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of catalyst is undoubtedly an excellent catalyst for α-olefin polymerization, and its performance is very close to that of metallocene catalysts, that is, the catalyst has high activity and can introduce comonomers uniformly, but there is also a relatively low molecular weight distribution of the polymer. Narrow problem, for example the polymer molecular weight distribution (Mw / Mn) disclosed by CN1199052A is only about 2, the molecular weight distribution (Mw / Mn) of the ethylene polymer disclosed by CN1188481A is about 2.5-3.7, such narrow molecular weight distribution will inevitably Affect the processing properties of polymers, thus greatly restricting the application fields of polymers

Method used

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  • Ligand of catalyzer for olefinic polymerization and transition metal complex
  • Ligand of catalyzer for olefinic polymerization and transition metal complex
  • Ligand of catalyzer for olefinic polymerization and transition metal complex

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Synthesis of Ligand Compound L1

[0057] 1.4, the synthesis of 4'-isopropylidene-bis(2-tert-butyl-phenol)

[0058] In a 500ml three-neck flask, add 138ml (0.6mol) of o-tert-butylphenol and 21.9ml (0.2mol) of acetone, stir, add 0.9ml of dodecanethiol, pass in hydrogen chloride gas, and react at room temperature for two days to obtain orange Viscous liquid, add 150ml of anhydrous ether, make it completely dissolved, then add 16.2g of NaHCO 3 Aqueous solution, the solution is light pink, then add an appropriate amount of distilled water to wash, collect the organic phase, add Na 2 SO 4 dry. Filter out Na 2 SO 4 , the filtrate was distilled under reduced pressure, the residue was added an appropriate amount of heptane, stirred to cool down, a large amount of white precipitate was precipitated, collected and dried to obtain white 4,4'-isopropylidene-bis(2-tert-butyl-phenol) solid powder.

[0059] Synthesis of 2.5,5'-isopropylidene-bis(3-tert-butyl-2-hydroxybenzaldehyd...

Embodiment 2

[0077] Synthetic Ligand L2

[0078] Under a nitrogen atmosphere, in a 250ml there-necked flask, add 2.0g (5.05mmol) of 5,5'-isopropylidene-bis(3-tert-butyl-2-hydroxybenzaldehyde) synthesized by the method in Example 1, and use 60ml of methanol was dissolved, then 1.39ml (12.12mmol) of cyclohexylamine and 0.6ml of formic acid were added, and the reaction was stirred at room temperature for 24 hours. The precipitate was filtered off and dried in vacuo to obtain 0.7 g (1.25 mmol, 24.8% yield) of Ligand L2 as a yellow powder.

[0079] Its structural formula is as follows:

[0080] Ligand L2CI-MS: 558 M +

Embodiment 3

[0082] synthetic ligand L3

[0083] Under a nitrogen atmosphere, in a 250ml there-necked flask, add 1.5g (3.79mmol) of 5,5'-isopropylidene-bis(3-tert-butyl-2-hydroxybenzaldehyde) synthesized by the method in Example 1, and use 60ml of methanol was dissolved, then 1.2ml (9.10mmol) of n-hexylamine and 0.6ml of formic acid were added, and the reaction was stirred at room temperature for 24 hours. The precipitate was filtered off and dried in vacuo to give ligand L3 as a yellow viscous liquid.

[0084] Its structural formula is as follows:

[0085] Ligand L3

[0086] EI-mass spectrum: 562 M +

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Abstract

A movel bridging ligand and its metallic match for the catalytic polymerization of olefin are disclosed. Said metallic match as the precursor of catalyst can be used in conjunction with cocatalyst for higher catalytic activity. The resultant resin has wide or dual-peak distribution of molecular weights.

Description

technical field [0001] The present invention relates to a ligand compound for olefin polymerization catalysts, transition metal complexes synthesized from the ligand compounds and olefin polymerization catalysts containing transition metal complexes. The invention also relates to the olefin polymerization catalysts used in olefin polymerization in the application. technical background [0002] With the continuous development of the polyolefin industry, many types of polyolefin catalysts have emerged, mainly including Ziegler-Natta catalysts, metallocene catalysts, and non-molecene single-site catalysts. Since the invention of the Ziegler-Natta catalytic system, a large number of improved catalysts have appeared, but due to their low catalytic activity and unsatisfactory copolymerization performance, they have been replaced by recently discovered metallocene catalysts in recent years. Typical metallocene catalysts consist of transition metal compounds with one or more cyclop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/00C08F4/76C08F10/00
Inventor 刘东兵孙涛张喆何雪霞张士茜周俊领
Owner CHINA PETROLEUM & CHEM CORP
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