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A kind of preparation method of high chlorinated polyethylene

A high-chlorinated polyethylene and polyethylene technology, applied in the field of chemical synthesis, can solve the problems of poor low temperature resistance, acidic corrosion, transparency and viscosity of products, and achieve the effect of expanding the application range and reducing equipment investment costs

Active Publication Date: 2017-10-31
LINYI AOXING CHEM CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to overcome the defects of poor low temperature resistance, acid corrosion, or poor transparency and viscosity after deacidification in the existing preparation method of high chlorinated polyethylene, and to provide a simple, stable and suitable for industrialization. The preparation method of high-chlorinated polyethylene with large-scale production and improved low temperature resistance, non-corrosive products, excellent transparency and viscosity

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  • A kind of preparation method of high chlorinated polyethylene

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Embodiment 1

[0034] A preparation method of high chlorinated polyethylene, the preparation method comprises the following steps:

[0035] (1) Add 30Kg compound polyethylene into the reaction kettle containing reaction medium and auxiliary agent, stir for 20min, the weight ratio of compound polyethylene to reaction medium and auxiliary agent is 1:10:0.1, and the reaction medium is 10 % hydrochloric acid aqueous solution;

[0036] (2) Chlorine is added to the reactor to carry out a chlorination reaction to obtain a high-chlorinated polyethylene crude product. The conditions of the chlorination reaction include: first reacting at 125° C. for 1.5 hours, then cooling to 88° C. for 1.5 hours; In the reaction, the amount of feeding chlorine is 4 times of the weight of the compounded polyethylene;

[0037] (3) The high-chlorinated polyethylene crude product obtained in step (2) is subjected to deacidification treatment, and the deacidification treatment includes: transporting the high-chlorinated...

Embodiment 2

[0041] A preparation method of high chlorinated polyethylene, the preparation method comprises the following steps:

[0042] (1) Add 30Kg compound polyethylene into the reaction kettle containing reaction medium and auxiliary agent, stir for 10-20min, the weight ratio of compound polyethylene to reaction medium and auxiliary agent is 1:13:0.05, the reaction medium 5% hydrochloric acid aqueous solution;

[0043] (2) Chlorine is added to the reaction kettle to carry out chlorination reaction to obtain the crude product of high chlorinated polyethylene. The conditions of chlorination reaction include: first react at 120°C for 2 hours, then react at 90°C for 1 hour; 6 times the weight of compounded polyethylene;

[0044] (3) Deacidifying the crude product of high chlorinated polyethylene obtained in step (2), the deacidification process includes: transporting the crude product of high chlorinated polyethylene to the agitator, adding 2 times the weight of water for washing, adding...

Embodiment 3

[0048] A preparation method of high chlorinated polyethylene, the preparation method comprises the following steps:

[0049] (1) Add 30Kg compound polyethylene into the reaction kettle containing reaction medium and auxiliary agent, stir for 20min, the weight ratio of compound polyethylene to reaction medium and auxiliary agent is 1:15:0.2, and the reaction medium is water ;

[0050] (2) Chlorine is added to the reactor to carry out the chlorination reaction to obtain the crude product of highly chlorinated polyethylene. The conditions of the chlorination reaction include: first reacting at 130°C for 1.5 hours, then reacting at 85°C for 2 hours; 5 times the weight of compounded polyethylene;

[0051] (3) Deacidifying the crude product of high chlorinated polyethylene obtained in step (2), the deacidification process includes: transporting the crude product of high chlorinated polyethylene to the agitator, adding 3 times the weight of water for washing, adding Sodium hydroxid...

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Abstract

The invention discloses a preparation method for high-chlorinated polyethylene. The preparation method comprises the steps that 1, compound polyethylene is added into a reaction kettle containing a reaction medium and an auxiliary, stirring is performed for 10-20 min, the weight ratio of compound polyethylene to the reaction medium to the auxiliary is 1:(10-15):(0.05-0.3), and water or an aqueous hydrochloric acid solution with the concentration of 5%-10% is adopted as the reaction medium; 2, chlorine is added into the reaction kettle for a chlorination reaction, and crude high-chlorinated polyethylene is obtained, wherein the chlorination reaction is performed for 3-6 hours at the temperature of 60 DEG C-140 DEG C; 3, deacidification treatment is performed on the crude high-chlorinated polyethylene obtained in the step 2, and drying is performed to obtain high-chlorinated polyethylene. The compound polyethylene is prepared from 20%-80% by weight of high molecular weight polyethylene and 20%-80% by weight of low molecular weight polyethylene, the number average molecular weight of the high molecular weight polyethylene is 20000-200000, and the number average molecular weight of the low molecular weight polyethylene is 2000-5000. The method is simple, practical, stable and suitable for industrialized scale production, the low temperature resistance of the product is improved, and the product has no corrosivity.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and in particular relates to a preparation method of high-chlorinated polyethylene. Background technique [0002] Highly chlorinated polyethylene (HCPE) is a chlorine-containing high molecular polymer produced after polyethylene is chlorinated. Due to the introduction of chlorine atoms, the oil resistance, heat resistance, and aging resistance of the high molecular polymer are significantly improved. , stable chemical properties, non-toxic, tasteless, thereby broadening the application range of polymers, mainly used as coatings, inks, etc. As a coating, high-chlorinated polyethylene has high adhesion and is an ideal anti-corrosion material, which can be used as heavy-duty anti-corrosion coatings, container and architectural coatings. [0003] At present, the production methods of high chlorinated polyethylene are mainly solvent method and solid phase method. The solvent method usually uses orga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F8/22C08F10/02
CPCC08F8/22C08F10/02
Inventor 陈子彦
Owner LINYI AOXING CHEM CO LTD
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