[N^O] type olefine polymerization catalyst containing N-naphthyl imine bitooth ligand and rear transition metal coordination and its preparation method

A late-transition metal and naphthyl imine technology, which is applied in the field of olefin polymerization catalysts and its preparation, can solve the problems of low molecular weight, insoluble products, and low catalytic activity

Inactive Publication Date: 2005-08-10
FUDAN UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, there are few studies on cationic or free radical polymerization, and the resulting product is a norbornene oligomer connected at the 2 and 7 positions with low relative molecular weight
In 1963, Sartori et al. first reported the addition polymerization of norbornene, but there were shortcomings such as low catalytic activity and low molecular weight.
After Kaminsky et al. discovered a highly efficient metallocene / methylaluminoxane catalytic system, great progress has been made in the addition polymerization of norbornene by using this catalytic system. The resulting polynorbornene has good thermal stability, but the product is insoluble in organic solvents , difficult to process

Method used

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  • [N^O] type olefine polymerization catalyst containing N-naphthyl imine bitooth ligand and rear transition metal coordination and its preparation method
  • [N^O] type olefine polymerization catalyst containing N-naphthyl imine bitooth ligand and rear transition metal coordination and its preparation method
  • [N^O] type olefine polymerization catalyst containing N-naphthyl imine bitooth ligand and rear transition metal coordination and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1: the preparation of N-(1-naphthyl)-2-hydroxyl-benzaldimine:

[0039] To a solution of 17.55 mmol of 2-hydroxy-benzaldehyde in 40 mL of ethanol was added 19.76 mmol of 1-naphthylamine and 1 drop of formic acid, and stirred at room temperature for 24 hours. Then the reaction solution was concentrated, and the brown solid was filtered out, and subjected to silica gel column chromatography to obtain brown yellow solid L1. Yield: 63.2%.

Embodiment 2

[0040] Embodiment 2: the preparation of N-(1-naphthyl)-2-hydroxyl-3-tert-butyl-benzaldimine:

[0041] To a solution of 17.55 mmol of 2-hydroxy-3-tert-butyl-benzaldehyde in 40 mL of ethanol was added 19.76 mmol of 1-naphthylamine and 1 drop of formic acid, and stirred at room temperature for 24 hours. Then the reaction solution was concentrated, and the brown solid was filtered out and subjected to silica gel column chromatography to obtain brown yellow solid L2. Yield: 73.3%.

Embodiment 3

[0042] Embodiment 3: the preparation of N-(1-naphthyl)-2-hydroxyl-5-methoxy-benzaldimine:

[0043] To a solution of 17.55 mmol of 2-hydroxy-5-methoxy-benzaldehyde in 40 mL of ethanol was added 19.76 mmol of 1-naphthylamine and 1 drop of formic acid, and stirred at room temperature for 24 hours. Then the reaction solution was concentrated, and the brown solid was filtered out and subjected to silica gel column chromatography to obtain brown yellow solid L3. Yield: 68.8%.

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Abstract

A catalyst for polymerizing norbornene is prepared from the [N^O]-type dual-tooth ligand containing N-naphthalenylimine and after-transition metal (Ni or Pb) through matching. It must be used in conjunction with the cocatalyst which may be methyl aluminoxyane (MAO) or modified methyl aluminoxyane. It has high catalytic activity and stability.

Description

technical field [0001] The invention belongs to the technical field of olefin polymerization catalysts, and specifically relates to an [N^O] type olefin polymerization catalyst containing N-naphthylimine bidentate ligand coordinated with a late transition metal and a preparation method thereof. technical background [0002] The development and research of olefin polymerization technology is one of the hot research topics in material science today. Polyolefin is the pillar industry of modern polymer material industry, and olefin polymerization catalyst is the technical core of polyolefin industry. Because metal coordination compound catalysts and organometallic catalysts can not only efficiently catalyze olefin polymerization under mild conditions, but also tailor the microstructure of polymers, it is possible to design new functional polyolefin materials and improve the properties of existing polymers at the molecular level. Therefore, research in this field has always been...

Claims

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Application Information

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IPC IPC(8): C08F4/609C08F4/70C08F10/00
Inventor 金国新汪伟华
Owner FUDAN UNIV
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