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Super-high molecular weight polyethylene catalyzer and preparation method thereof

A technology of ultra-high molecular weight and catalyst, applied in the production of bulk chemicals, etc., can solve problems such as environmental pollution, and achieve the effects of high bulk density, simple and feasible preparation method, and high activity

Active Publication Date: 2008-01-02
SHANGHAI RES INST OF CHEM IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst has good activity, and the bulk density of polyethylene is relatively high, but in the preparation process of the catalyst, a large amount of titanium tetrachloride needs to be used for post-treatment, which will bring a greater cost to the post-treatment work in industrial production. problems and environmental pollution, while catalyst polymerization requires pre-polymerization

Method used

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  • Super-high molecular weight polyethylene catalyzer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Add 60ml of n-heptane, 0.5ml of ethyl benzoate, 4.2g of anhydrous magnesium chloride into a 250ml four-neck flask with a heating system, a stirring device and a condensing system and purged with nitrogen, stir well, drop Add 28ml of 2-ethylhexanol to the system. After the dropwise addition, raise the temperature of the system to 100°C, and keep the reaction at this temperature for 2 hours to obtain a magnesium compound solution. After cooling to room temperature, add 10ml of tetrachloride Add the mixture of silicon and 10ml of n-heptane dropwise to the above solution, stir and react for 0.5 hours after the dropwise addition, then add 2ml of titanium tetrachloride and raise it to 70°C, keep the reaction at this temperature for 1 hour and then cool naturally . After cooling to room temperature, the solid was washed three times with 150 ml of n-hexane, and vacuum-dried at room temperature to obtain a light yellow powdery solid substance with good fluidity. After sampling ...

Embodiment 2

[0055] Do not add ethyl benzoate, all the other are the same as in Example 1.

[0056] Polymerization test is with embodiment 1.

[0057] The polymerization test results are shown in Table 1.

Embodiment 3

[0059] Replace silicon tetrachloride with dichlorodiphenylsilane in an amount of 20ml, and the rest are the same as in Example 1.

[0060] Polymerization test is with embodiment 1.

[0061] The polymerization test results are shown in Table 1.

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Abstract

The invention discloses a hyperhigh molecular weight polyethylene catalyst and making method, which consists of catalyst host component and catalyst promoter, wherein the catalyst host making method comprises the following steps: (1)reacting magnesium halide and alcohol to form magnesium compound; (2)reacting the magnesium compound and silicon compound with at least one halogen group to form an intermediate product; (3)reacting the intermediate product and titanium compound to make the catalyst host; adding benzoate compound in each reacting step selectively. The invention has high activity and hyperhigh molecular weight, which improves the accumulation density.

Description

technical field [0001] The invention relates to an ultra-high molecular weight polyethylene catalyst and a preparation method of the catalyst. Background technique [0002] According to ASTM4020, ultra-high molecular weight polyethylene (UHMWPE) is linear polyethylene with a relative viscosity of 1.44 or higher, which is measured at 135° C. in a solution of 0.02% decahydronaphthalene. Compared with other polyethylenes, it has high wear resistance, excellent toughness and thermal stability, and is widely used in textile industry, mechanical engineering, chemical industry and mining industry. [0003] For ultra-high molecular weight polyethylene, in addition to the size of the molecular weight can affect its mechanical properties and processing properties, the particle shape and particle size distribution of ultra-high molecular weight polyethylene also play an important role. The current research on ultra-high molecular weight polyethylene catalysts mainly includes the follo...

Claims

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Application Information

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IPC IPC(8): C08F10/02C08F4/654
CPCY02P20/52
Inventor 张长远肖明威李阳阳余世炯
Owner SHANGHAI RES INST OF CHEM IND
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