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Propene polymer and preparation method and application thereof

A technology for polymerizing propylene polymers and olefins, applied in the field of propylene polymers and their preparation, can solve problems such as film tearing, hindering the diffusion of polymerized monomers, adverse effects on production efficiency, etc., and achieve the effect of ensuring the production process

Active Publication Date: 2013-05-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when the existing gas-phase polymerization method is used to prepare propylene terpolymers, since the generated propylene terpolymers exist in the reactor in the form of particles or powders, these particles and powders tend to stick to each other Or agglomeration, blocking the material discharge pipe of the reactor, making the continuous production stop, and adversely affecting the production efficiency
In addition, due to the mutual adhesion or agglomeration between particles and powder, it will also hinder the diffusion of polymerized monomers into the catalyst, and combine with the active center on the catalyst to carry out polymerization reaction, so that the composition of the prepared polymer product is not uniform, and the performance Also, these polymer products are prone to film tearing when used to make polymer films

Method used

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  • Propene polymer and preparation method and application thereof
  • Propene polymer and preparation method and application thereof
  • Propene polymer and preparation method and application thereof

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preparation example Construction

[0016] The present invention provides a method for preparing propylene polymer. The method comprises in a gas phase polymerization reactor, under the conditions of olefin gas phase polymerization, propylene, ethylene and C are selected from 4 -C 8 The α-olefin is in contact with the olefin polymerization catalyst system.

[0017] In the present invention, the propylene polymer refers to a combination of propylene, ethylene and C 4 -C 8 A random copolymer formed by copolymerization of the α-olefin of, wherein the α-olefin may be one α-olefin or two or more α-olefins.

[0018] According to the method of the present invention, the olefin polymerization catalyst system can be various catalyst systems commonly used in the art that can catalyze the organic stereopolymerization of propylene. Generally, the olefin polymerization catalyst system contains a solid component, an external electron donor compound and an organoaluminum compound, and the solid component contains a carrier and a tit...

Embodiment 1

[0088] This example is used to illustrate the propylene polymer and its preparation method according to the present invention.

[0089] The solid component of the catalyst (commercially available from Beijing Aoda Petrochemical Co., Ltd.) is screened so that the particle size of the solid component is 8-100 microns, and the particle size is the solid component in the range of 14-30 microns. The amount is 80% by volume. Such as figure 1 As shown, the particle size distribution curve of the obtained solid component is a unimodal distribution.

[0090] The solid component uses magnesium chloride as a carrier, wherein, based on the total amount of the solid component, the content of titanium in terms of elements is 2.5% by weight, and the content of di-n-butyl terephthalate is 10% by weight.

[0091] Add the catalyst solid component to 50m continuously at 0.63kg / h 3 In the continuous horizontal agitated bed gas phase reactor, use a pump to continuously add triethylaluminum, the amount o...

Embodiment 2

[0097] This example is used to illustrate the propylene polymer and its preparation method according to the present invention.

[0098] The propylene polymer was prepared by the same method as in Example 1, except that the pressure in the reactor was 2.4MPa, the temperature in the reactor was 60°C, and the hydrogen / propylene molar ratio (H 2 / C 3 ) Is 0.013.

[0099] The polymer obtained by the polymerization is in the form of granules without agglomeration, and there is no phenomenon of blocking the material discharge pipeline of the reactor when discharging. The composition and properties of the prepared propylene polymer are shown in Table 1.

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Abstract

The invention provides a propene polymer, a preparation method and an application thereof; according to the method, propene, ethene and alpha-olefins selected from C4-C8 contact with an olefin polymerization catalyst system under an olefin vapor phase polymerization condition in a vapor phase polymerization reactor; the olefin polymerization catalyst system comprises a solid component, an external electron donor compound and an organo-aluminum compound; the solid component comprises a carrier, and a titanium compound and an internal electron donor compound loaded on the carrier; the particle size of the solid component is within a range of 8-150 microns; and the particle size distribution curve of the solid component has unimodal distribution. The method of the invention can effectively inhibit mutual adhesion and caking of polymer particles during the vapor phase polymerization process, and thus ensure the smooth production process; the propene polymer of the invention is uniform in composition, stable in performance, and quite suitable for polymer film preparation.

Description

Technical field [0001] The invention relates to a propylene polymer and its preparation method and application. Background technique [0002] Propylene terpolymers are usually formed by copolymerizing propylene, ethylene, and α-olefins other than propylene. Copolymerizing propylene with ethylene and α-olefins other than propylene, thereby introducing structural units derived from ethylene and structural units derived from α-olefins other than propylene into the macromolecular chain of propylene homopolymers can reduce propylene The crystallization temperature of the homopolymer improves the performance of the propylene homopolymer product, and the propylene terpolymer formed therefrom has unique advantages when used in the preparation of polymer films. [0003] CN1107084C discloses a propylene terpolymer which contains ethylene and at least one selected from C 4 -C 8 The comonomer unit of α-olefin, wherein the ethylene content is 0.3-10% by weight, the α-olefin content is 1-25% by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/06C08F210/02C08F210/08C08F2/34C08L23/14
Inventor 华炜马良兴赵丽梅袁春海成卫戍谷汉进陈青葵田正昕耿存赵春红张启明杨连永
Owner CHINA PETROLEUM & CHEM CORP
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