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Catalyst for preparing ultra-high-molecular-weight polyethylene and preparation method and application thereof

An ultra-high molecular weight and catalyst technology, applied in the production of bulk chemicals, etc., can solve the problems of coarse particle size and difficult to obtain ultra-high molecular weight polyethylene with small particle size, and achieve fine particle size, uniform particle distribution, high industrial The effect of applying value

Pending Publication Date: 2020-06-26
JIANGSU YANGNONG CHEM GROUP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In summary, the particle size obtained by the existing production of polyethylene is relatively thick, and it is difficult to obtain ultra-high molecular weight polyethylene with small particle size. Catalysts key to further improving processing and performance of ethylene polymer products

Method used

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  • Catalyst for preparing ultra-high-molecular-weight polyethylene and preparation method and application thereof
  • Catalyst for preparing ultra-high-molecular-weight polyethylene and preparation method and application thereof

Examples

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Embodiment 1

[0093] This embodiment provides a catalyst for preparing ultra-high molecular weight polyethylene, and the titanium content and magnesium content of the catalyst are shown in Table 1.

[0094] The preparation method of described catalyst comprises the steps:

[0095] (1) Put 4.76g (0.05mo1MgCl 2 , 30mL decane and 20mL isooctyl alcohol (0.125mol)) were heated to 130 ° C, after stirring for 60 min, a uniform solution was formed to obtain a magnesium alcohol mixture;

[0096] (2) Cool down the magnesium alcohol mixture to 75°C, add phthalic anhydride and 3-chloropropyltrimethoxysilane, wherein, anhydrous magnesium chloride, phthalic anhydride and 3-chloropropyltrimethoxysilane The mol ratio of oxysilane is 1:0.5:0.5, after stirring for 60min, the magnesium alcohol reaction solution is obtained, and the magnesium alcohol reaction solution is transferred to the constant pressure dropping funnel for subsequent use;

[0097] (3) Take another reaction bottle with mechanical stirring...

Embodiment 2

[0099] This embodiment provides a catalyst for preparing ultra-high molecular weight polyethylene, and the titanium content and magnesium content of the catalyst are shown in Table 1.

[0100] The preparation method of the catalyst is the same as in Example 1 except that the consumption of isooctyl alcohol in step (1) is adjusted to 25mL (that is, the molar ratio of anhydrous magnesium chloride to isooctyl alcohol is 1:3).

Embodiment 3

[0102] This embodiment provides a catalyst for preparing ultra-high molecular weight polyethylene, and the titanium content and magnesium content of the catalyst are shown in Table 1.

[0103] The preparation method of the catalyst is the same as in Example 1 except that the consumption of iso-octanol in step (1) is adjusted to 68mL (that is, the molar ratio of anhydrous magnesium chloride to iso-octanol is 1:8).

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Abstract

The invention provides a catalyst for preparing ultrahigh-molecular-weight polyethylene. According to the catalyst, a mixed solution of a magnesium source and alcohol reacts with an electron body anda precipitation aid, and then a titanium-loaded reaction is carried out. The obtained catalyst contains 15-18wt% of magnesium and 6-9wt% of titanium, and has high reaction activity for ethylene polymerization reaction; and the prepared ultra-high-molecular-weight polyethylene is good in form, fine in particle size and uniform in particle distribution; the catalyst can be used for producing a special spinning material for ultra-high-molecular-weight polyethylene, and has relatively high industrial application value.

Description

technical field [0001] The invention relates to the technical field of ethylene polymerization catalysts, in particular to a catalyst for preparing ultra-high molecular weight polyethylene, a preparation method and application thereof. Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) is a polyethylene resin with a molecular weight of 1.5 million to 8 million. Because it has a larger molecular weight than ordinary polyethylene, UHMWPE has excellent properties such as impact resistance, wear resistance, self-lubrication, low temperature resistance, and chemical corrosion resistance, and is widely used in machinery, transportation, papermaking, mining, electric power , agriculture, chemical industry, and aviation and other fields. In addition, there are currently two most important application areas for UHMWPE, one is super strong polyethylene fiber, which can be used for cables, fishing nets and bulletproof military equipment. The other is the ...

Claims

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Application Information

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IPC IPC(8): C08F10/02C08F110/02C08F4/654C08F4/649
CPCC08F10/02C08F110/02C08F4/6546C08F4/6494C08F2500/01Y02P20/52
Inventor 吴健丁克鸿徐林王根林许学翔寇书培王敏娟
Owner JIANGSU YANGNONG CHEM GROUP
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