A kind of ethylene-alpha-olefin copolymer, its manufacture method and its application

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: 2018-03-23
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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  • A kind of ethylene-alpha-olefin copolymer, its manufacture method and its application

Examples

Experimental program
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preparation example Construction

[0144] According to the present invention, the preparation method of the supported non-metallocene catalyst comprises the following steps: dissolving the magnesium compound and the non-metallocene ligand in a solvent in the presence of alcohol to obtain a solution of the magnesium compound; Adding a precipitant to the solution or drying the magnesium compound solution to obtain a magnesium compound carrier; and contacting the magnesium compound carrier with a chemical treatment agent selected from Group IVB metal compounds to obtain the supported non-metallocene catalyst step.

[0145] The steps for obtaining the magnesium compound solution are specifically described below.

[0146] According to this procedure, 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) in the presence of alcohol, thereby obtaining the magnesium compound solution.

[0147] As the solvent, f...

Embodiment 1

[0448] The magnesium compound adopts anhydrous magnesium chloride, the solvent adopts tetrahydrofuran, the alcohol adopts n-butanol, the chemical treatment agent of IVB group metal compound adopts titanium tetrachloride, the precipitating agent adopts hexane, and the non-metallocene ligand adopts the structure compound of.

[0449] Weigh 5g of anhydrous magnesium chloride, add solvent, non-metallocene ligand and alcohol, and dissolve completely at normal temperature to obtain a magnesium compound solution, add a precipitating agent to the magnesium compound solution to make it completely precipitate, filter, and wash 3 times with a precipitating agent. The amount of the secondary precipitating agent is 60ml, and it is uniformly heated to 60° C. and vacuum-dried to obtain a magnesium compound carrier.

[0450] Add the prepared magnesium compound carrier into the hexane solvent, add the IVB group chemical treatment agent dropwise within 30 minutes at room temperature, and then...

Embodiment 2

[0454] Basically the same as Example 1, but with the following changes:

[0455] Before the magnesium compound carrier is in contact with the chemical treatment agent, the magnesium compound carrier is treated with triethylaluminum, an auxiliary chemical treatment agent.

[0456] That is, add the magnesium compound 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, each time with the same amount of solvent added before, and finally vacuum-dried at 60° C. to obtain a pretreated magnesium compound carrier. The molar ratio of the magnesium compound carrier calculated as Mg element to the auxiliary chemical treatment agent calculated as Al element is 1:0.2.

[0457] Supported non-metallocene catalysts are designated CAT-2.

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Abstract

The present invention relates to an ethylene-alpha-olefin copolymer, its production method and its application in the manufacture of shaped articles. The ethylene-alpha-olefin copolymer exhibits a balance of excellent processability and mechanical properties compared with 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 Patents(China)
IPC IPC(8): C08L23/08C08L23/06C08F210/16C08F110/02C08F4/649C08F4/658C08F4/659C08F4/02
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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