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Method for preparing chloride metallocene polypropylene by acid-phase emulsion melting process

A technology of metallocene polypropylene and chlorinated metallocene, applied in the field of acid phase emulsion melting method to prepare chlorinated metallocene polypropylene, which can solve the problems of inability to achieve solubility and inability to break the crystallinity of polypropylene, so as to avoid environmental pollution Problems, cost reduction, effect of improving chlorination uniformity

Active Publication Date: 2015-01-28
徐晨曦 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The maximum temperature of the chlorination reaction of the aqueous phase suspension method does not exceed 150°C, and the crystallinity of polypropylene with a melting point of 164-170°C cannot be broken, so soluble chlorinated polypropylene products cannot be produced

Method used

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  • Method for preparing chloride metallocene polypropylene by acid-phase emulsion melting process

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Embodiment 1

[0047] In the present embodiment, the method for preparing chlorinated metallocene polypropylene by acid phase emulsion melting method, the chlorination process is initiated by adding an initiator, including the following steps:

[0048] 1) Emulsification chlorination reaction

[0049] Add 80 liters of hydrochloric acid solution with a mass concentration of 30% into the reactor, start stirring, add 2Kg of fatty acid polyethylene glycol ester, 2Kg of polyoxyethylene ether and 5Kg of metallocene polypropylene particles, open the steam valve of the reactor to heat up and emulsify, Add 200g of benzoyl peroxide when the temperature in the reactor rises to 75-80°C, close the reactor, and start feeding liquid chlorine when the temperature in the reactor rises to 90°C, and control the temperature in the reactor to 90-130°C. As the amount of chlorine increases, the temperature of the materials in the reactor also increases. Controlling the reaction temperature is a key factor for the s...

Embodiment 2

[0053] In the present embodiment, the method for preparing chlorinated metallocene polypropylene by acid phase emulsion melting method, the chlorination process is initiated by adding an initiator, including the following steps:

[0054] 1) Emulsification chlorination reaction

[0055] Add 75 liters of hydrochloric acid solution with a mass concentration of 20% into the reactor, start stirring, add 1.5Kg of sodium polymethacrylate, 2Kg of castor oil epoxy ethyl ethers and 5Kg of metallocene polypropylene particles, and open the steam valve of the reactor Heating and emulsification, when the temperature in the reactor rises to 75-80°C, add 150g of azobisisobutylamidine hydrochloride, close the reactor, and start feeding liquid chlorine when the temperature of the reactor rises to 90°C, and control the temperature in the reactor. The temperature is 90-130°C. As the amount of chlorine increases, the temperature of the materials in the reactor also increases. Controlling the reac...

Embodiment 3

[0059] In the present embodiment, the method for preparing chlorinated metallocene polypropylene by acid phase emulsion melting method, the chlorination process is initiated by adding an initiator, including the following steps:

[0060] 1) Emulsification chlorination reaction

[0061] Add 85 liters of hydrochloric acid solution with a mass concentration of 25% into the reactor, start stirring, add 2.5Kg of polyvinylpyrrolidone, 3Kg of polyoxyethylene ether and 5Kg of metallocene polypropylene particles, and open the steam valve of the reactor to heat up and emulsify. Add 180g of azobisisobutyronitrile when the temperature in the kettle rises to 75-80°C, close the reaction kettle, and start feeding liquid chlorine when the temperature in the kettle rises to 90°C, and control the temperature in the reaction kettle to 90-130°C. As the amount of chlorine increases, the temperature of the materials in the reactor also increases. Controlling the reaction temperature is a key factor...

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Abstract

The invention discloses a method for preparing chloride metallocene polypropylene by an acid-phase emulsion melting process. The method comprises the processes of emulsifying, chlorinating and neutralizing all units, wherein in the chlorination process, initiation reaction can be carried out by photo-initiation and thermal initiation through the adding of an initiator. The chlorination reaction of metallocene polypropylene is carried out in a hydrochloric acid medium, the reaction is similar to homogenizing reaction and has the properties of free radical reaction, and the metallocene polypropylene is dispersed and suspended in the acid-phase medium under the action of a dispersant, an emulsifier, agitating and shearing. As the disappearance of metallocene polypropylene crystal is caused by chlorination reaction, and the polarity of metallocene polypropylene macromolecules is increased by the introduction of chloride atoms at the same time, CmPP (Chloride Metallocene Polypropylene) prepared by the invention is easily dissolved in organic solvents, such as methylbenzene and xylene, and polypropylene chloride becomes a soluble material.

Description

1. Technical field [0001] The invention relates to a method for preparing chlorinated metallocene polypropylene by an acid phase emulsion melting method, which belongs to the field of polymer material chemical industry. 2. Background technology [0002] Solvent method chlorinated polypropylene (CPP) has been industrialized in the United States and Japan since the 1960s, and has been widely used, resulting in huge economic value. CPP can be used as a flame retardant or auxiliary plasticizer in the plastic or rubber industry. After being treated with NH3, CPP has semiconductor properties. After being modified with melamine, it can be used in a wider range of applications. CPP can also be used in the battery industry to make bonded carbon. Powder, carbon electrodes, and the preparation of impact-resistant cationic polymerization catalysts, the preparation of pharmaceutical suppositories and other products accounted for about 20%. CPP with medium and high chlorine content (40%-...

Claims

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Application Information

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IPC IPC(8): C08F10/06C08F8/22
Inventor 徐晨曦陈剑平陈凌峰
Owner 徐晨曦
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