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Extra high-molecular polythene catalyst and its production

An ultra-high molecular weight, catalyst technology, applied in the field of catalyst preparation, can solve problems such as environmental pollution, and achieve the effect of high activity

Active Publication Date: 2007-11-21
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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] In a 250ml four-neck flask equipped with a heating system and a stirring device and a condensing system, and purged with nitrogen, add 4.3 grams of anhydrous magnesium chloride and 80 milliliters of hexane, stir well, and measure 28 milliliters of 2-ethyl Add 0.8 ml of hexanol and n-butyl titanate dropwise into the flask, then raise the temperature to 65°C, keep the reaction at this temperature for 2 hours, cool to room temperature, add 20 ml of diethylaluminum chloride, and raise the temperature to 60°C , kept reacting at this temperature for 1.5 hours, cooled to room temperature, obtained a suspension of particle precipitates, washed with hexane solvent, then added 2.0 milliliters of diphenyl ether, 2 milliliters of titanium tetrachloride, and heated to 60 ℃, keep the reaction at this temperature for 3 hours, then continue to raise the temperature, and heat and dry under nitrogen purging to obtain a powdery catalyst main component with good fluidity.

[0045] Polymeri...

Embodiment 2

[0048] The diphenyl ether was replaced with diphenyldimethoxysilane, and the consumption was 2.5 milliliters, and the rest were the same as in Example 1.

[0049] Polymerization is the same as in Example 1. The result data of catalyst polymerization evaluation are shown in Table 1, and the screening data of polymerization products are shown in Table 2.

Embodiment 3

[0051] The amount of butyl titanate was adjusted to 2.3 milliliters, and the rest were the same as in Example 1.

[0052] Polymerization is the same as in Example 1. The result data of catalyst polymerization evaluation are shown in Table 1, and the screening data of polymerization products are shown in Table 2.

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PUM

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Abstract

Ultrahigh molecular weight polyethylene catalyst and its production are disclosed. The catalyst consists of main components of catalyst and catalyst accessory. The process is carried out by reacting halide magnesium compound with alcohol compound and organic titanate compound to obtain magnesium compound solution, reacting with alkyl chlorine aluminum compound to obtain intermediate product, reacting with titanium compound and electron-donating to obtain final product. It has higher activity and better stacking density.

Description

technical field [0001] The invention relates to a catalyst for ultra-high molecular weight polyethylene and a preparation method of the catalyst. Background technique [0002] According to the definition of ASTM4020, ultra-high molecular weight polyethylene (UHMWPE) is a linear polyethylene having a relative viscosity of 2.30 or higher, which is measured in 100 ml of a 0.05% decahydronaphthalene solution at 135°C. 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 size and particle size distribution of ultra-high molecular weight polyethylene also play an important role. Therefore, the current research on UHMWPE catalysts mainly includes (1)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/02C08F4/645C08F4/649
Inventor 肖明威余世炯张长远
Owner SHANGHAI RES INST OF CHEM IND
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