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Aryloxy side chain half sandwich titanocene complex having large steric hindrance and application thereof

A technology of aryloxy and complexes, applied in the field of olefin polymerization catalysts, can solve the problems of low polyethylene molecular weight and failure to meet the requirements, and achieve the effects of good copolymerization performance, stable structure and high catalytic activity

Active Publication Date: 2015-09-02
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the linear low density polyethylene produced by these catalysts has a low molecular weight and cannot meet the requirements of practical applications.

Method used

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  • Aryloxy side chain half sandwich titanocene complex having large steric hindrance and application thereof
  • Aryloxy side chain half sandwich titanocene complex having large steric hindrance and application thereof
  • Aryloxy side chain half sandwich titanocene complex having large steric hindrance and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1, the preparation of complex Ti1

[0033] Under an inert atmosphere, room temperature and stirring conditions, 0.81 mL of TiCl with a concentration of 2.0 mol / L 4 The toluene solution was slowly added to the 10ml toluene solution containing 1.6mmol 2-(2,3,4,5-tetramethylcyclopentadiene)-4-tert-butyl-6-tritylphenol, and the reaction temperature Raise to 70°C, react for 2 hours, filter out insoluble matter, and evaporate the solvent to dryness under reduced pressure to obtain a crude product. The crude product was ultrasonically washed with a small amount of hexane solvent, and after filtration, the solvent was dried on a vacuum line to obtain 0.58 g of a dark red solid product with a yield of 57%. Labeled Ti1.

Embodiment 2

[0034] Embodiment 2, the preparation of complex Ti2

[0035] Under an inert atmosphere, room temperature and stirring conditions, 0.56 mL of TiCl with a concentration of 2.0 mol / L 4Slowly add the toluene solution into the 10ml toluene solution containing 1.1mmol 2-(2,3,4,5-tetramethylcyclopentadiene)-4-tert-butyl-6-tri(p-tolyl)methylphenol , the reaction temperature was raised to 70°C, and the insoluble matter was filtered off after 2 hours of reaction, and the solvent was evaporated to dryness under reduced pressure to obtain a crude product. The crude product was ultrasonically washed with a small amount of hexane solvent, filtered, and the solvent was dried on a vacuum line to obtain 0.49 g of an orange-red solid product with a yield of 64%. Marked as Ti2.

Embodiment 3

[0036] Embodiment 3, the preparation of complex Ti3

[0037] Under an inert atmosphere, room temperature and stirring conditions, 0.82 mL of TiCl with a concentration of 2.0 mol / L 4 The toluene solution was slowly added to 10ml of 1.6mmol 2-(2,3,4,5-tetramethylcyclopentadiene)-4-tert-butyl-6-(1,1-diphenyl)butylphenol In the toluene solution, the reaction temperature was raised to 70° C., and the insoluble matter was filtered off after 2 hours of reaction, and the solvent was evaporated to dryness under reduced pressure to obtain a crude product. The crude product was ultrasonically washed with a small amount of hexane solvent, filtered, and the solvent was dried on a vacuum line to obtain 0.51 g of an orange-red solid product with a yield of 54%. Marked as Ti3.

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Abstract

The invention provides an aryloxy side chain half sandwich titanocene complex having large steric hindrance and application thereof and belongs to the technical field of alkene polymerization catalyst. The structural formula of the aryloxy side chain half sandwich titanocene complex having large steric hindrance is as follows (shown in the description), the aryloxy side chain half sandwich titanocene complex having large steric hindrance is used as a main catalyst and a mixture of alkylaluminoxane or aluminum alkyl and an organo-boron assistant is used as a catalyst promoter to form a catalytic system which can be used for catalyzing ethylene polymerization or ethylene / alpha-olefin copolymerization. The aryloxy side chain half sandwich titanocene complex having large steric hindrance is stable in property and has the advantages of being good in heat stability, high in catalytic activity, long in service life, high in polymer molecular weight and the like when being used for catalyzing ethylene polymerization or ethylene / alpha-olefin copolymerization.

Description

technical field [0001] The invention belongs to the technical field of olefin polymerization catalysts, in particular to a mono-titanocene complex containing aryloxy side chains and its application in catalyzing ethylene homopolymerization and ethylene / α-olefin copolymerization. Background technique [0002] Both polyethylene (PE) and linear low-density polyethylene (LLDPE) are important synthetic resins with a wide range of uses. In the process of producing linear low-density polyethylene, adding unsaturated olefin comonomers with more than 3 carbon atoms to copolymerize with ethylene can reduce the density of the polymer, improve the mechanical strength and toughness of the polymer, and improve the machinability and heat resistance. performance. The higher the carbon number of the comonomer, the better the overall performance of the polymer. At present, linear low density polyethylene produced by copolymerization of 1-hexene, 1-octene and other α-olefins with ethylene is...

Claims

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Application Information

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IPC IPC(8): C08F4/6592C08F110/02C08F210/16
Inventor 母瀛霍杭宋婷婷
Owner JILIN UNIV
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