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Propylene polymer and preparation method thereof

A propylene polymer and polymer technology, applied in the production of single-component polypropylene rayon filament, single-component polyolefin rayon filament, and bulk chemical production, etc., can solve problems such as difficulty in designing and synthesizing ligand steric hindrance catalysts

Inactive Publication Date: 2020-05-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, too low temperature is not suitable for existing industrial reaction devices, and the excessive ligand steric hindrance makes the design and synthesis of catalysts more difficult.

Method used

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  • Propylene polymer and preparation method thereof
  • Propylene polymer and preparation method thereof
  • Propylene polymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] (1) Preparation of Ligand 1: 3.52g (8mmol) of ɑ-diimine compound 1, add 30ml of toluene, 1M trimethylaluminum (8ml, 8mmol) successively, reflux reaction for 8 hours, and use sodium hydroxide / ice The reaction was terminated with water, extracted with ethyl acetate, the organic phases were combined, and dried over anhydrous magnesium sulfate. The product was separated by petroleum ether / ethyl acetate column chromatography to obtain a colorless crystal ligand 1 with a yield of 85.2%;

[0095] 1HNMRδ(ppm)7.23-6.88(m,14H),4.84(s,1H),4.73(s,1H),3.85(s,1H,NH),2.02(s,3H,CH3),1.87(s,6H ,CH3),1.75(s,6H,CH3);

[0096] (2) Preparation of complex 1: 10ml (DME) NiBr 2 (277mg, 0.9mmol) in dichloromethane solution was added dropwise to 10ml of Ligand 1 (411mg, 0.9mmol) in dichloromethane solution, stirred at room temperature for 6 hours, a precipitate precipitated, filtered, washed with ether and dried to obtain a red powder solid. Productive rate is 84%; Elemental analysis (C 33 h ...

Embodiment 2

[0099] Step (1), (2) are with embodiment 1;

[0100] (3) Propylene polymerization: In a 48-channel parallel pressure reactor (PPR, reaction volume 20ml), add 13.4mg (20μmol) complex 1, propylene replacement reactor, add 5ml methyl aluminoxane (MAO), Fill with propylene gas, control the pressure at 1Mpa, and react at 40°C for 1 hour; discharge the material, neutralize it with 5% hydrochloric acid acidified ethanol solution, dry it to obtain polypropylene, and calculate the catalyst activity; simultaneously measure the polymer weight average molecular weight Mw and Molecular weight distribution Mw / Mn, the results are shown in Table 1.

Embodiment 3

[0102] Step (1), (2) are with embodiment 1;

[0103] (3) Propylene polymerization: In a 48-channel parallel pressure reactor (PPR, reaction volume 20ml), add 13.4mg (20μmol) complex 1, propylene replacement reactor, add 5ml methyl aluminoxane (MAO), Fill with propylene gas, control the pressure at 1Mpa, react at 60°C for 1 hour; discharge the material, neutralize it with 5% hydrochloric acid acidified ethanol solution, dry it to obtain polypropylene, and calculate the catalyst activity; simultaneously measure the polymer weight average molecular weight Mw and Molecular weight distribution Mw / Mn, the results are shown in Table 1.

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Abstract

The invention discloses a propylene polymer, which has no melting point through DSC test, is a random propylene polymer, and has a weight-average molecular weight of 30000-400000 and a molecular weight distribution of 1.0-3.0, preferably 1.0-1.5. The invention also discloses a preparation method of the propylene polymer, wherein the method comprises: making propylene contact a catalyst under the condition of an olefin polymerization reaction, wherein the catalyst comprises a main catalyst and a cocatalyst, and the main catalyst is selected from a metal coordination compound represented by a formula I. According to the present invention, propylene polymerization can be catalyzed at a high activity at a high temperature to prepare completely random polypropylene, and the molecular weight ofthe obtained polymer can be regulated and controlled within a certain range by regulating the structure of the coordination compound.

Description

technical field [0001] The invention relates to a propylene polymer and a preparation method thereof, in particular to a random propylene polymer without melting point and a preparation method thereof, belonging to the field of propylene polymers. Background technique [0002] my country is the country with the fastest growing consumption of synthetic resin and the largest importer of synthetic resin. At present, the proportion of polyolefin production is nearly 60%. Compared with other resin materials, olefin resin has excellent environmental coordination. Materials used in the industry for key promotions. Polypropylene is one of the synthetic resins with the fastest development, the largest output and a wide range of uses, reaching 70 million tons in 2017. Atactic polypropylene has the characteristics of good solubility, moisture resistance and chemical resistance; it can be used as coating and adhesive components, main agent of blends, special material preparation agents,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/70C08F110/06C08J5/18D01F6/06D01F6/46
CPCC08F110/06C08J5/18C08J2323/12D01F6/06D01F6/46C08F4/7098C08F2500/03Y02P20/52
Inventor 张军辉高榕周俊领郭子芳林洁李季禹张晓帆赵惠
Owner CHINA PETROLEUM & CHEM CORP