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

A technology of an olefin copolymer and a manufacturing method, which is applied in the field of ethylene copolymer and can solve the problems of poor processing performance and small application range of ultra-high molecular weight polyethylene.

Active Publication Date: 2015-11-04
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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Experimental program
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Effect test

preparation example Construction

[0155] According to the present invention, the preparation method of the supported non-metallocene catalyst comprises the following steps: dissolving the magnesium compound in the first solvent in the presence of alcohol to obtain a magnesium compound solution; making the porous carrier and the magnesium compound solution mixing to obtain a first mixed slurry; adding a precipitant to the first mixed slurry or drying the first mixed slurry to obtain a composite carrier; making the composite carrier and a chemical compound selected from Group IVB metal compounds The step of contacting the treatment agent to obtain the modified composite carrier; and the step of contacting the non-metallocene complex with the modified composite carrier in the presence of a second solvent to obtain the supported non-metallocene catalyst.

[0156] The magnesium compound will be specifically described below.

[0157] According to the present invention, the term "magnesium compound" refers to an orga...

Embodiment 1

[0550] Anhydrous magnesium chloride is used as the magnesium compound, tetrahydrofuran is used as the first solvent, ethanol is used as the alcohol, and silica gel is used as the porous carrier, the model is ES757 from Ineos Company. . The IVB chemical treatment agent adopts titanium tetrachloride (TiCl 4 ), the second solvent is dichloromethane, and the non-metallocene complex is compound of.

[0551] Weigh 5 grams of magnesium compound, add it to the first solvent, then add alcohol, completely dissolve at room temperature to obtain a magnesium compound solution, then add a porous carrier, stir for 2 hours to obtain the first mixed slurry, and then evenly heat to 90°C , directly vacuum-dried to obtain a composite carrier.

[0552] Add the prepared composite carrier into the hexane solvent, add the IVB group chemical treatment agent dropwise within 30 minutes at room temperature, then evenly heat to 60°C and react at a constant temperature for 2 hours, filter, wash with h...

Embodiment 2

[0557] Basically the same as Example 1, but with the following changes:

[0558]Before the modified composite carrier is in contact with the non-metallocene complex, it is treated with triethylaluminum as an auxiliary chemical treatment agent to obtain a pretreated composite carrier.

[0559] That is, add the modified composite carrier to the hexane solvent, then slowly add the auxiliary chemical treatment agent triethylaluminum (concentration: 0.88mol / L, hexane solution), stir at 60°C for 2 hours, filter, wash with hexane 3 times, the amount of each time is the same as that of the previously added solvent, and finally vacuum-dried at 60° C. to obtain a pretreated composite carrier. The molar ratio of the composite support in terms of Mg element to the auxiliary chemical treatment agent in terms of Al element is 1:0.2.

[0560] Supported non-metallocene catalysts are designated 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 molding product manufacturing, wherein the ethylene-alpha-olefin copolymer exhibits balanced and excellent processability and mechanical properties compared with the ethylene-alpha-olefin copolymer 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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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/16C08F4/02C08F4/649C08F4/643C08F4/646
Inventor 李传峰任鸿平易玉明汪文睿郭峰阚林柏基业杨爱武
Owner SINOPEC YANGZI PETROCHEM
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