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Graft modified ultra-high-molecular-weight ultra-fine propene polymer and solid-phase grafting method thereof

A propylene polymer and ultra-high molecular weight technology, which is applied in the field of graft-modified ultra-high molecular weight ultra-fine particle size propylene polymer and its solid-phase grafting, can solve the problem of increasing production costs, being difficult to achieve large-scale low-cost production, The reaction process is complex and other problems, to achieve the effects of low cost, improved specific surface area, and simple process

Active Publication Date: 2017-01-11
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods can reduce the grafting temperature and grafting time and improve the grafting rate to a certain extent, the entire reaction process operation is too complicated, and new media or equipment are introduced, which greatly increases the production cost and is difficult to obtain. Achieve large-scale low-cost production

Method used

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  • Graft modified ultra-high-molecular-weight ultra-fine propene polymer and solid-phase grafting method thereof
  • Graft modified ultra-high-molecular-weight ultra-fine propene polymer and solid-phase grafting method thereof
  • Graft modified ultra-high-molecular-weight ultra-fine propene polymer and solid-phase grafting method thereof

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preparation example Construction

[0042] The preparation of the above-mentioned powder can adopt the method disclosed in the invention patent application submitted by the applicant on the same day of the application as "Ultra-high molecular weight ultra-fine propylene polymer powder and its preparation method", the full text of which is incorporated in this application as refer to.

[0043] Specifically, the above-mentioned powder is prepared by the following method: a method for preparing an ultra-high molecular weight ultra-fine particle size propylene polymer powder, which includes the following steps:

[0044] Under the action of a catalyst, propylene or propylene and comonomers undergo a polymerization reaction, wherein the temperature of the polymerization reaction is 30-105°C, and the volume fraction of propylene is greater than or equal to 98%;

[0045] The catalyst is prepared by a method comprising the following steps:

[0046] (a) magnesium halide, alcohol compound, auxiliary agent, part of the int...

preparation example 1

[0106] Preparation Example 1 Preparation of ultra-high molecular weight ultra-fine particle size propylene homopolymer powder

[0107] In the reactor fully replaced by high-purity nitrogen, add 4.94g of anhydrous magnesium chloride, 18.9g of isooctyl alcohol, and 30ml of decane in sequence, raise the temperature to 130°C under stirring, and maintain it for 2 hours, then add 2.65g of tetrabutyl titanate The ester and 2.05g of diisobutyl phthalate were reacted at 130°C for 1 hour, and finally cooled to room temperature to form a homogeneous transparent solution, namely mixture I.

[0108] Add 200ml of titanium tetrachloride to the reaction kettle, stir and preheat to 0°C, add the mixture I dropwise to the titanium tetrachloride in about 2 hours. After the dropwise addition was completed, the temperature was raised to 110° C. within 2 hours. 1.23 g of internal electron donor diisobutyl phthalate was added. After reacting at this temperature for 2 hours, remove the reaction liqu...

preparation example 2

[0112] Preparation Example 2 The preparation of ultra-high molecular weight ultra-fine particle size propylene-ethylene copolymer powder

[0113] The preparation method of catalyst is the same as Preparation Example 1.

[0114] Propylene-ethylene copolymerization:

[0115] Under the protection of high-purity nitrogen, dry and deoxygenate the 5L high-pressure reactor, add 20mg of the above-mentioned catalyst, 12ml of triethylaluminum and 3ml of external electron donor Donor-P, then add 1200g of propylene, and feed 40g of ethylene, among which, The volume fraction of propylene is 99.9%, the content of carbon monoxide in ethylene gas is less than 5ppm, the content of carbon dioxide is less than 15ppm, and the content of conjugated diene is less than 10ppm. The polymerization reaction starts, the system temperature is maintained at 75°C, and the reaction time is 60 minutes.

[0116] The propylene-ethylene copolymer powder is a spherical particle with an average particle diameter ...

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Abstract

The invention provides a method for preparing a grafted propene polymer by solid-phase grafting through an ultra-high-molecular-weight ultra-fine-grain-size propene polymer and the grafted propene polymer prepared by the method. The effective grafting rate of a grafting monomer is greater than 0.5%; a basic polymer is a propene polymer; the propene polymer is power and is in the shape of spherical particles, the average grain size is 10 mu m-200 mu m, the standard difference is 2 mu m-15 mu m, and the bulk density is 0.1 g / mL-0.4 g / mL; and the viscosity-average molecular weight (Mv) of the propene polymer is greater than 1*106. The method is simple in process, relatively low in cost and simple to operate. Industrial production is realized easily. Aspects of thermal property, mechanical property and polarity of the grafted propene polymer are improved obviously, and the original excellent properties of the grafted propene polymer are maintained.

Description

technical field [0001] The invention relates to a graft polymer and a preparation method thereof, in particular to a graft-modified ultra-high molecular weight and ultra-fine particle diameter propylene polymer and a solid-phase grafting method thereof. Background technique [0002] As a general-purpose plastic, polypropylene is famous for its large output, wide range of applications, and high quality and low price. However, polypropylene has poor cold resistance, weather resistance, light resistance, dyeability, adhesiveness, antistatic property, and hydrophilicity. , and poor compatibility with other polar polymers, inorganic fillers and reinforcing materials, these shortcomings restrict the application of polypropylene in the field of packaging materials, automotive industry, electronics industry and medical equipment. [0003] In order to improve the performance of polypropylene and expand its application range, it is necessary to modify polypropylene. There are many wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/02C08F255/04C08F255/06C08F222/06C08F220/06C08F2/36
CPCC08F2/36C08F255/02C08F255/04C08F255/06C08F222/06C08F220/06
Inventor 李化毅李倩孙同兵朱才镇刘瑞刚赵宁徐坚
Owner INST OF CHEM CHINESE ACAD OF SCI
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