Ethylene-alpha-olefin copolymer, manufacturing method and applications thereof

A technology for olefin copolymers and manufacturing methods, which is applied in the field of ethylene copolymers and can solve the problems of poor processing performance and small application range of ultra-high molecular weight polyethylene

Active Publication Date: 2015-10-28
SINOPEC YANGZI PETROCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high molecular weight, the UHMWPE has poor processability and can only be applied to wear-resistant products such as sintering molding and low-speed extrusion pipes, and the application range is small.

Method used

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  • Ethylene-alpha-olefin copolymer, manufacturing method and applications thereof

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preparation example Construction

[0147] According to the present invention, the preparation method of the supported non-metallocene catalyst includes the following steps: the magnesium compound and the non-metallocene ligand are dissolved in a solvent in the presence of alcohol to obtain a magnesium compound solution; The steps of mixing the magnesium compound solution to obtain a mixed slurry; adding a precipitation agent to the mixed slurry or drying the mixed slurry to obtain a composite carrier; and combining the composite carrier with the silicon compound of formula (X) and the optional The step of obtaining the supported non-metallocene catalyst by contacting the chemical treatment agent of the IVB metal compound.

[0148] The steps for obtaining the magnesium compound solution will be specifically described below.

[0149] According to this step, the magnesium compound and the non-metallocene ligand are dissolved in an appropriate solvent (also referred to as a solvent for dissolving the magnesium compound)...

Embodiment 1

[0539] The magnesium compound adopts anhydrous magnesium chloride, and the non-metallocene ligand adopts the structure The compound, the solvent is tetrahydrofuran, the alcohol is ethanol, the porous carrier is silica, namely silica gel, the model is ES757 of Ineos Company. First, the silica gel is continuously calcined at 600°C under nitrogen atmosphere for 4 hours to thermally activate. The silicon compound uses tetraethoxy silicon, and the IVB chemical treatment agent uses titanium tetrachloride (TiCl 4 ).

[0540] Weigh 5 grams of magnesium compound and add it to the solvent, then add alcohol and non-metallocene ligand to completely dissolve the magnesium compound solution at room temperature, then add the porous carrier, stir for 2 hours to obtain a mixed slurry, and then uniformly heat to 90 ℃, directly vacuum and dry to obtain a composite carrier.

[0541] Add the prepared composite carrier to the hexane solvent, add the silicon compound dropwise within 10 minutes at room ...

Embodiment 2

[0545] It is basically the same as embodiment 1, but has the following changes:

[0546] Before the composite carrier comes into contact with the silicon compound and the chemical treatment agent, the composite carrier is treated with the auxiliary chemical treatment agent triethyl aluminum.

[0547] That is, the composite carrier is added to the hexane solvent, and then the auxiliary chemical treatment agent triethyl aluminum (concentration 0.88mol / L, hexane solution) is slowly added dropwise, stirred at 60°C for 2 hours, filtered, and washed with hexane 3 Second, the amount of each time is the same as the amount of solvent added before, and finally vacuum drying at 60°C to obtain a supported non-metallocene catalyst. The molar ratio of the composite carrier based on the Mg element to the auxiliary chemical treatment agent based on the Al element is 1:0.2.

[0548] The supported non-metallocene catalyst is referred to as CAT-2.

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Abstract

The present invention relates to an ethylene-alpha-olefin copolymer and a manufacturing method thereof, and applications of the ethylene-alpha-olefin copolymer in molded product manufacturing. According to the present invention, the ethylene-alpha-olefin copolymer has advantages of balanced and excellent processability and mechanical property compared with the product in the prior art.

Description

technical field [0001] The present invention relates to an ethylene copolymer. Specifically, the present invention relates to an ethylene-α-olefin copolymer, a method for its production and its use in the manufacture of shaped articles. Background technique [0002] Polyolefin is the largest synthetic resin in the world and has a very broad application market. Polyolefins mainly include polyethylene (PE), polypropylene (PP) and copolymers of ethylene and propylene, 1-butene, 1-hexene and 1-octene and other α-olefins. [0003] In general, the strength of polyolefins such as polyethylene depends on its molecular weight. The higher the molecular weight, the higher the strength, elasticity and environmental stress cracking resistance of the material, but the processing performance of polyethylene with higher molecular weight will be poor. For this reason, it is known that increasing the molecular weight distribution of the polymer can achieve a balance among the rigidity, toug...

Claims

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Application Information

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IPC IPC(8): C08F210/16C08F4/646C08F4/02C08F2/06C08L23/08
Inventor 任鸿平李传峰左胜武汪文睿易玉明郭峰梅利阚林柏基业陈韶辉
Owner SINOPEC YANGZI PETROCHEM
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