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A kind of olefin polymer and its production method

A technology for olefin polymers and manufacturing methods, which is applied in the field of olefin polymerization, and can solve the problems of high polymer ash content, low monomer conversion rate, low polymerization activity, etc.

Active Publication Date: 2018-03-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the synthesis of polyolefin materials with high melting point is still immature, the polymerization activity is relatively low, the monomer conversion rate is low, and the ash content of the obtained polymer is high. At the same time, the melting point of the polymer is not high enough.

Method used

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  • A kind of olefin polymer and its production method
  • A kind of olefin polymer and its production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The dry reactor was evacuated and flushed with nitrogen three times repeatedly. At room temperature, start stirring, add appropriate amount of toluene, 1.0 ml 4,4-dimethyl-1-pentene, 6.0 ml MAO toluene solution, 1.0 ml containing 20 micromole racemic ethylene-bridged bis-indenyl dichloride Zirconium solution in toluene, start timing. After 48 hours, stop stirring, carefully pour the reaction solution into a beaker, add acidified ethanol, stir for more than 6 hours, filter to obtain the polymer, and vacuum-dry the filter cake at 60°C for 24 hours, weigh to obtain 0.45 g of the polymer, monomer The weight conversion was 66%. The melting point of the polymer was 207°C as measured by DSC.

Embodiment 2

[0032] The dry reactor was evacuated and flushed with nitrogen three times repeatedly. At 50°C, start stirring, and add an appropriate amount of toluene, 1.0 ml of 4,4-dimethyl-1-pentene, 6.0 ml of MAO toluene solution, and 1.0 ml of 20 micromole racemic dimethylsilyl-diindenyl Zirconium dichloride in toluene solution, start timing. After 48 hours, stop stirring, carefully pour the reaction solution into a beaker, add acidified ethanol, stir for more than 6 hours, filter to obtain the polymer, and vacuum-dry the filter cake at 60°C for 24 hours, weigh to obtain 0.49 g of the polymer, monomer The weight conversion rate was 72%. The melting point of the polymer was 211°C as measured by DSC.

Embodiment 3

[0034] The dry reactor was evacuated and flushed with nitrogen three times repeatedly. At room temperature, start stirring, add appropriate amount of toluene, 1.0 ml 4,4-dimethyl-1-pentene, 6.0 ml MAO toluene solution, 1.0 ml containing 20 micromole racemic dimethylsilyl bridge bis(2- Methyl-4-phenyl-indenyl) toluene solution of zirconium dichloride, start timing. After 48 hours, stop stirring, carefully pour the reaction solution into a beaker, add acidified ethanol, stir for more than 6 hours, filter to obtain the polymer, and vacuum-dry the filter cake at 60°C for 24 hours, weigh to obtain 0.52 g of the polymer, monomer The weight conversion rate was 76%. According to the DSC test, the melting point of the polymer is 223°C.

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Abstract

The present invention relates to an olefin polymer, the general structural formula of which is shown in formula (I), wherein, n is the number average degree of polymerization. The present invention also provides a method for producing the olefin polymer. The olefin polymer is produced by carrying out a copolymerization reaction of 4,4-dimethyl-1-pentene in the presence of a polymerization catalyst.

Description

technical field [0001] The invention belongs to the technical field of olefin polymerization, and relates to an olefin polymer with a high melting point and a manufacturing method thereof. Background technique [0002] Crystalline polyolefin materials have a melting point, and the melting point depends on the type of monomer and the type, degree and defect of polymer stereoregulation, as well as the type of crystallization. For example, the melting point of polyethylene without branching is about 140°C, and the melting point of highly isotactic polypropylene is about 170°C. The melting point of polyolefin materials determines its use to a large extent, and materials with high melting points may be used under harsher conditions. [0003] An α-olefin having a higher carbon number than propylene is used as a monomer for polymerization, and it is possible to obtain a polyolefin material having a high melting point. For example, the isotactic pentad ([mmmm]) disclosed in Chines...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F110/14C08F4/6592
Inventor 王伟郑刚王洪涛
Owner CHINA PETROLEUM & CHEM CORP
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