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Olefin polymer and preparation method thereof

An olefin polymerization and olefin technology, applied in the field of olefin polymers and their preparation, can solve the problems of high polymerization efficiency, difficulty in hydrogenation sensitivity, and further improvement of hydrogenation sensitivity, so as to achieve high polymerization efficiency and good hydrogenation The effect of adjusting sensitivity

Active Publication Date: 2015-07-08
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although during the polymerization of olefins (especially propylene), the use of external electron donor compounds disclosed in US5652303, US5844046, US6111039 and US6087459 can improve the melt mass flow rate of the polymer finally obtained to a certain extent, but the above-mentioned olefins The hydrogen tuning sensitivity of the polymerization catalyst system still needs to be further improved
Moreover, it is still difficult to achieve a balance between good hydrogen modulation sensitivity and high polymerization efficiency in the olefin polymerization catalyst system using the above two silane compounds as external electron donor compounds.
In addition, when the above-mentioned external electron donor compounds are used to prepare propylene polymers by gas phase polymerization, it is difficult to obtain propylene polymers with a high melt mass flow index.

Method used

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  • Olefin polymer and preparation method thereof
  • Olefin polymer and preparation method thereof
  • Olefin polymer and preparation method thereof

Examples

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preparation example Construction

[0032] According to the present invention, various methods known to those skilled in the art can be used to prepare the solid component. For example, the preparation method of the solid component may include: contacting the magnesium compound with a titanium compound and an internal electron donor compound in an organic solvent, followed by solid-liquid separation, washing and drying. According to the present invention, the amount of the titanium compound, the internal electron donor compound and the magnesium compound is based on the content of each component in the final solid component meeting the specific use requirements. Preferably, the molar ratio of the titanium compound, the internal electron donor compound and the magnesium compound is 0.01-0.5:0.01-50:1.

[0033] According to the method of the present invention, the preparation method of the solid component is preferably: in the presence of a hydrocarbon solvent, at a temperature of 110-150 ° C, contacting the magne...

preparation example 1

[0065] (1) Preparation of magnesium chloride alcoholate

[0066] The three-neck flask equipped with a stirrer and a thermometer was replaced with nitrogen three times, and then 5 g of anhydrous magnesium chloride, 30 mL of n-decane and 23 mL of ethanol were added. The temperature was raised to 130°C while stirring, and the reaction was carried out at this temperature for 2 hours. 1.5 mL of tetrabutyl titanate and 2 mL of diisobutyl phthalate were added to 5 mL of toluene in advance, and the reaction was stirred at room temperature for 0.5 hours. Add the above toluene solution into the three-necked flask, and continue to react at 130° C. for 1 hour. After the reaction is completed, cool to room temperature to form a stable and uniform magnesium chloride alcoholate solution.

[0067] (2) Preparation of the solid component of the catalyst

[0068] The reactor equipped with stirrer and thermometer was replaced with nitrogen three times, then 200 mL of titanium tetrachloride was a...

preparation example 2

[0070] (1) Preparation of magnesium chloride alcoholate

[0071] Adopt the same method as step (1) in the preparation example 1 to prepare magnesium chloride alcoholate, the difference is, use di-n-butyl phthalate instead of diisobutyl phthalate, thereby prepare magnesium chloride alcoholate solution .

[0072] (2) Preparation of the solid component of the catalyst

[0073] The solid component of the catalyst is prepared in the same manner as step (2) in Preparation Example 1, except that di-n-butyl phthalate is used instead of diisobutyl phthalate to obtain the solid component of the catalyst point. The content of Ti in this solid component was 2.12 wt%.

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Abstract

The invention relates to an olefin polymer and a preparation method thereof. According to the method, an olefin polymerization catalyst system comes into contact with one or more olefins under the condition of olefin polymerization, wherein the olefin polymerization catalyst system contains a solid component, an external electron donor compound and an organic aluminum compound, the solid component contains titanium, magnesium and an internal electron donor compound, the external electron donor compound contains a first external electron donor compound and a second external electron donor compound, the first external electron donor compound is diisobutyldimethoxysilane and the second external electron donor compound is n-propyl trimethoxysilane and / or tetraethoxy-silicone. The olefin polymerization method provided by the invention has excellent hydrogen regulation sensibility and high polymerization efficiency and is applicable to occasions of preparation of propene polymers in a gaseous polymerization way.

Description

technical field [0001] The invention relates to an olefin polymer and a preparation method thereof. Background technique [0002] With the improvement of propylene polymer production technology, especially the improvement of new high-efficiency catalysts and polymerization process, great progress has been made in the development and application of high fluidity propylene polymer products. The use of high fluidity propylene polymer can not only reduce the defects in the injection process, thereby reducing the scrap rate; but also can reduce the processing temperature, injection pressure and mold clamping force, thereby reducing energy consumption and shortening the molding cycle of products. In addition, due to the improved fluidity of the resin, thin-walled products can also be produced, reducing the amount of raw materials used. In order to increase the melt mass flow rate (MFR) of propylene polymer, the following two production methods are usually adopted: one is degradat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F110/06C08F210/06C08F4/646C08F210/16
Inventor 成卫戍赵唤群李国李卫华于建明程静博赵丽梅孙颜文鲁列赵红竹
Owner CHINA PETROLEUM & CHEM CORP
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