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Terpolymer carrier and preparation method thereof

A terpolymer and carrier technology, applied in the field of terpolymer and its preparation, can solve the problems of uncontrollable particle specific surface area and average pore size, unfavorable metallocene catalyst loading, small particle size of polymer particles, etc. Uniform size, low inorganic ash content, narrow dispersion effect

Active Publication Date: 2015-04-29
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses a two-step swelling method to prepare monodisperse porous microspheres. The preparation method is relatively complicated and the prepared polymer particles have a small particle size. The specific surface area and average pore size of the particles are uncontrollable, which is not conducive to the loading of metallocene catalysts.

Method used

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  • Terpolymer carrier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Comonomer treatment: use 10% NaOH solution to remove the polymerization inhibitor before use of styrene and divinylbenzene, and then use it after washing 3 times with deionized water; use neutral oxidation for ethylene glycol dimethacrylate The aluminum chromatographic column was used after removing the polymerization inhibitor. The following examples do not specifically illustrate that the comonomers are used after treatment.

[0019] Preparation of organic porous support: In a 250ml glass reactor, add 150ml ethanol and 15ml deionized water, then add 8ml (about 7.4g) styrene, 8ml 55% (about 7.5g) divinylbenzene and 5ml dimethyl Ethylene glycol acrylate (about 4.8g), stirred at room temperature for 5 minutes, then added 2% polyvinyl alcohol (polymerization degree: 1750) of monomer mass at 45°C, stirred for 1 hour to dissolve the polyvinyl alcohol stabilizer, Then add 10ml DNBP and 1.5% AIBN of monomer mass, raise the temperature to 70°C, react for 3 hours, then raise t...

Embodiment 2

[0021] Preparation of organic porous support: In a 250ml glass reactor, add 108ml ethanol and 12ml deionized water, then add 4ml (about 3.9g) styrene, 4ml 55% (about 3.7g) divinylbenzene and 2ml dimethyl Ethylene glycol acrylate (about 2.0g), stirred at room temperature for 5 minutes, then added 2% polyvinyl alcohol (polymerization degree: 1750) of monomer mass at 45°C, stirred for 1 hour to dissolve the polyvinyl alcohol stabilizer, Then add 4ml DNBP and 1.5% AIBN of monomer mass, raise the temperature to 70°C, react for 3 hours, then raise the temperature to 80°C, react for 5 hours, stir at 600 rpm, wash with ethanol 3 times, and dry Finally, a porous organic carrier is obtained.

Embodiment 3

[0023] The preparation of the organic porous carrier in Example 3 is the same as in Example 2 except that the amount of porogen used is different, and the preparation steps are the same as the amount of other reagents. In Example 3, 7ml DNBP was added instead of 4ml DNBP.

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Abstract

The invention relates to a terpolymer carrier prepared by polymerizing divinyl benzene, styrene and ethylene glycol dimethacrylate and a preparation method thereof. According to the carrier, the pore diameter is 3-18nm, the specific surface area is 80-300m<2> / g, and the bulk density is 0.25-0.35g / ml. The carrier is prepared by a dispersion polymerization method, the reaction monomers divinyl benzene, styrene and ethylene glycol dimethacrylate are sequentially added into a dispersion liquid, the particle shape of the terpolymer carrier is controlled by adding a stabilizing agent, and the pore diameter of the terpolymer carrier is adjusted by adding a pore-foaming agent. The terpolymer carrier prepared by the method is monodisperse porous microsphere, the particle size and pore diameter of the carrier are controllable, loading of a metallocene catalyst system is facilitated, and the formed catalyst has a relatively high activity.

Description

technical field [0001] The invention relates to a terpolymer and a preparation method thereof. The terpolymer is especially suitable for a carrier of an olefin polymerization catalyst. technical background [0002] At present, the vast majority of commercial olefin polymerization catalysts use supported catalysts, and the catalysts usually use inorganic substances to support the catalyst. Patents CN98126385, CN1174549, and CN1356343 report that inorganic substances such as magnesium chloride, silicon dioxide, aluminum oxide, magnesium carbonate, etc. are used as carriers to prepare supported Ziegler-Natta and metallocene catalysts, but these inorganic carriers will affect the performance of polyolefins after being introduced into polymers . In recent years, due to the unique properties of organic polymer carriers with porous structures (such as high activity, good copolymerization performance, especially the prepared polymer products have low inorganic ash content, etc.), t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/36C08F212/08C08F222/14C08J9/28C08F4/02C08F10/00
Inventor 王雄朱博超徐人威韩晓昱贾军纪姚培洪葛汉青任峰刘义郝萍吴江许云波姜健姜飞
Owner PETROCHINA CO LTD
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