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Metallocene catalyst for synthesizing polyolefin elastomer, preparation method and application

A technology of metallocene catalysts and polyolefin elastomers, applied in the field of catalysts, can solve the problems of high consumption of cocatalyst MAO and high cost of catalyst preparation, and achieve the effects of high ethylene content, good particle shape and high catalytic activity

Active Publication Date: 2021-01-08
上海葛蓝化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the single-site catalyst supported by silica gel, the consumption of co-catalyst MAO is high, resulting in high catalyst preparation cost

Method used

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  • Metallocene catalyst for synthesizing polyolefin elastomer, preparation method and application
  • Metallocene catalyst for synthesizing polyolefin elastomer, preparation method and application
  • Metallocene catalyst for synthesizing polyolefin elastomer, preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0035] The preparation method of spherical montmorillonite carrier in embodiment 1-3 is:

[0036] (1) Acidification treatment

[0037] Take 150g of montmorillonite, disperse it in 500mL of deionized water, stir for 1h, then add 1000mL of 0.75M hydrochloric acid solution, and stir at 80°C for 24h. The acidified montmorillonite was washed with deionized water to pH = 7 (adding AgNO 3 After the solution, the washing solution has no white precipitate). After drying at 100°C, grind and sieve to 200 mesh. The montmorillonite that had been sieved to remove coarse particles was dried at 100° C. for 2 hours, and then dried under vacuum for 2 hours, cooled to room temperature under nitrogen protection, and packaged for use.

[0038] (2) High shear dispersion treatment

[0039] Get 50g of montmorillonite obtained after the acidification treatment in step (1), disperse it in 200mL deionized water, and process it with a high-speed disperser (Krupp SupratonTM type S200) at normal temper...

Embodiment 1

[0054] A preparation method and application of a metallocene catalyst for synthesizing polyolefin elastomers:

[0055] (1) Catalyst loading

[0056] The spherical montmorillonite carrier was further vacuum-dried at 150°C for 4 hours, and the metallocene compound was supported by the following method to prepare a supported catalyst:

[0057] Under the protection of nitrogen, accurately weigh 10 g of the treated spherical montmorillonite carrier and transfer it to a glass reactor fully replaced by nitrogen, add 70 mL of dewatered and refined toluene; stir to disperse evenly, add 5 mL of methyl aluminum oxide alkane (1.5M toluene solution), stirred at 20°C for 20min to obtain a pretreated montmorillonite carrier;

[0058] Under nitrogen protection, accurately weigh 150 mg of the metallocene compound [4-(6-(bis(4-(4-(tert-butyl)phenyl)-2-methyl-1H-inden-1-yl) synthesized above) (Methyl)silyl)hexyl)-N,N-dimethylaniline]zirconium dichloride, transfer to a glass reactor fully repla...

Embodiment 2

[0063] A preparation method and application of a metallocene catalyst for synthesizing polyolefin elastomers:

[0064] (1) Catalyst loading

[0065] The spherical montmorillonite carrier was further vacuum-dried at 150°C for 4 hours, and the metallocene compound was supported by the following method to prepare a supported catalyst:

[0066] Under the protection of nitrogen, accurately weigh 10 g of the treated spherical montmorillonite carrier and transfer it to a glass reactor fully replaced by nitrogen, add 80 mL of dewatered and refined toluene; stir to disperse evenly.

[0067]Under nitrogen protection, accurately weigh 150 mg of the metallocene compound [4-(6-(bis(4-(4-(tert-butyl)phenyl)-2-methyl-1H-inden-1-yl) synthesized above) (Methyl)silyl)hexyl)-N,N-dimethylaniline]zirconium dichloride, transfer to a glass reactor fully replaced by nitrogen, add 30mL of toluene purified by dehydration; stir to dissolve After completion, 2 mL of methylaluminoxane (1.5 M solution in...

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Abstract

The invention discloses a metallocene catalyst for synthesizing a polyolefin elastomer, a preparation method and application of the metallocene catalyst in preparation of the polyolefin elastomer by agas phase method. The metallocene catalyst comprises a metallocene compound and a spherical montmorillonite carrier, and the structural formula of the metallocene compound is shown as the specification. The preparation method comprises the following steps of: adding an organic solvent and a cocatalyst into the spherical montmorillonite carrier to obtain a pretreated spherical montmorillonite carrier suspension; adding an organic solvent and a cocatalyst solution into the metallocene compound to obtain an activated metallocene compound solution; and adding the activated metallocene compound solution into the spherical montmorillonite carrier suspension, and drying the obtained solid to obtain the metallocene catalyst. The metallocene catalyst prepared in the invention is used for olefin polymerization, and the obtained resin has the advantages of high ethylene content, good particle morphology and low caking risk. Under the action of a small amount of cocatalyst, the metal catalyst canacquire higher catalytic activity, and other polymerization properties are not influenced.

Description

technical field [0001] The invention relates to a metallocene catalyst for synthesizing polyolefin elastomers, a preparation method and application, and belongs to the technical field of catalysts. Background technique [0002] Polyolefin elastomer is a kind of polyolefin material formed by copolymerization of ethylene and propylene or other α-olefins (such as 1-butene, 1-hexene, 1-octene, etc.). Compared with polyolefin plastics, the content of comonomers in the molecular chain is higher and the density is lower. At present, polyolefin elastomers mainly include ethylene-propylene copolymers and ethylene / α-olefin copolymers. Among them, ethylene-propylene copolymer elastomers include binary ethylene-propylene rubber (EPM) and tertiary ethylene-propylene rubber (EPDM). Two, ethylene / α-olefin copolymer elastomers mainly include ethylene / α-olefin random copolymer (POE) and ethylene / α-olefin block copolymer (OBC). [0003] Ethylene-propylene elastomers are widely used in indus...

Claims

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Application Information

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IPC IPC(8): C08F210/06C08F210/16C08F4/659C08F4/02C08F2/34
CPCC08F210/06C08F210/16C08F2/34C08F4/02C08F4/65927C08F2500/08Y02P20/52
Inventor 朱博源刘云
Owner 上海葛蓝化工科技有限公司
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