A kind of propylene polymer and its preparation method and application

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: 2015-08-26
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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  • A kind of propylene polymer and its preparation method and application
  • A kind of propylene polymer and its preparation method and application
  • A kind of propylene polymer and its preparation method and application

Examples

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preparation example Construction

[0016] The present invention provides a kind of preparation method of propylene polymer, and this method comprises in gas phase polymerization reactor, under the condition of olefin gas phase polymerization, propylene, ethylene and selected from C 4 -C 8 The alpha-olefin is contacted with an olefin polymerization catalyst system.

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

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

Embodiment 1

[0088] This example serves to illustrate the propylene polymer and the process for its preparation according to the present invention.

[0089] Catalyst solid component (commercially purchased from Beijing Aoda Petrochemical Co., Ltd.) is sieved so that the particle size of the obtained solid component is 8-100 microns, and the particle size of the solid component in the range of 14-30 microns The amount is 80% by volume. Such as figure 1 As shown, the obtained particle size distribution curve of the 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] Continuously feed the catalyst solid component into 50m at 0.63kg / h 3 In the continuous horizontal stirred bed gas-phase reactor, add triethylaluminum continuously with the pump...

Embodiment 2

[0097] This example serves to illustrate the propylene polymer and the process for its preparation according to the present invention.

[0098] Adopt the same method as Example 1 to prepare propylene polymer, the difference is that the pressure in the reactor is 2.4MPa, the temperature in the reactor is 60 ° C, and the hydrogen / propylene molar ratio (H 2 / C 3 ) is 0.013.

[0099]The polymer obtained by polymerization is granular without agglomeration, and there is no phenomenon that the material discharge pipe of the reactor is blocked when the material is discharged. The composition and properties of the propylene polymers prepared 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 present invention relates to a propylene polymer and its preparation method and application. Background technique [0002] Propylene terpolymers are generally formed by copolymerizing propylene, ethylene, and α-olefins other than propylene. Copolymerize propylene with ethylene and α-olefins other than propylene, so that structural units derived from ethylene and structural units derived from α-olefins other than propylene can be introduced into the macromolecular chain of the propylene homopolymer to reduce propylene The crystallization temperature of the homopolymer improves the properties of the propylene homopolymer product, and the resulting propylene terpolymer has unique advantages when used in the preparation of polymer films. [0003] CN1107084C discloses a kind of propylene terpolymer, and this propylene terpolymer comprises and is derived from ethylene and at least one is selected from C 4 -C 8 Comonomer units of α-olefins, wherein the...

Claims

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Application Information

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Patent Type & Authority Patents(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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