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Method for preparing emulsion type di-(2-ethylhexyl) peroxydicarbonate

A technology of peroxydicarbonate and ethylhexyl ester is applied in the field of preparation of emulsion type peroxydicarbonate, which can solve the problems affecting the product quality of high polymers such as polyvinyl chloride, low activity and high toxicity, and achieve product quality The effect of high stabilizing activity, less dosage, and improved product content and yield

Inactive Publication Date: 2012-05-09
LINZIZHENGHUA ACCESSORY INGREDIENT ZIBO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, azo initiators have insurmountable disadvantages such as low activity and high toxicity, which affect the quality of high polymers such as polyvinyl chloride products, and the toxic substances in the production process are seriously harmful to the human body.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment one: the preparation steps of emulsion type peroxydicarbonate two (2-ethylhexyl) (EHP) are as follows:

[0013] (1) In a 500ml flask, add 100 grams of 90% sodium hydroxide solution and 100 grams of water, stir and cool to 10°C;

[0014] (2) dripping 28 grams of hydrogen peroxide with a mass content of 27.5%, stirring and reacting to make sodium peroxide solution, the concentration is about 7%;

[0015] (3) After stirring evenly, slowly add 75 grams of 2-ethylhexyl chloroformate dropwise into the flask, the reaction temperature is controlled at 25°C to 30°C, and the addition is completed within 1.5 hours to 2 hours. Stirring reaction after base hexyl ester for 30 minutes;

[0016] (4) Stop stirring after the reaction finishes, leave standstill, separate the reaction mother liquor, wash the reaction product with water until the pH value is 6;

[0017] (5) Mix ethanol, lactobacillin, polyvinyl alcohol, and deionized water in a mass ratio of 1:0.8:0.1:1.2 to ob...

Embodiment 2

[0020] Embodiment two: the preparation steps of emulsion type bis(2-ethylhexyl hexyl) peroxydicarbonate (EHP) are as follows:

[0021] (1) In a 500ml flask, add 100 grams of 90% sodium hydroxide solution and 100 grams of water, stir and cool to 10°C;

[0022] (2) dripping 28 grams of hydrogen peroxide with a mass content of 27.5%, stirring and reacting to make sodium peroxide solution, the concentration is about 7%;

[0023] (3) After stirring evenly, slowly add 75 grams of 2-ethylhexyl chloroformate dropwise into the flask, the reaction temperature is controlled at 25°C to 30°C, and the addition is completed within 1.5 hours to 2 hours. Stirring reaction after base hexyl ester for 30 minutes;

[0024] (4) Stop stirring after the reaction finishes, leave standstill, separate the reaction mother liquor, wash the reaction product with water until the pH value is 7;

[0025] (5) Mix ethanol, lactobacillin, polyvinyl alcohol, and deionized water in a mass ratio of 1:0.8:0.1:1.2 ...

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Abstract

The invention relates to a method for preparing an initiator for polymer synthesis, in particular to a method for preparing emulsion type di-(2-ethylhexyl) peroxydicarbonate (EHP). The technical scheme provided by the invention is characterized in that the method for emulsion type di-(2-ethylhexyl) peroxydicarbonate (EHP) comprises the following steps of: under the condition of the temperature of 10-40 DEG C, mixing an alkaline solution and a strong oxidant, adding 2-ethylhexyl chloroformate organic solution, filtering, adding proper amount of a homogenization liquid prepared by mixing an anti-freezing agent, an emulsifier and a dispersing agent, and obtaining the emulsion type di-(2-ethylhexyl) peroxydicarbonate (EHP). According to the method of preparing the emulsion type di-(2-ethylhexyl) peroxydicarbonate (EHP) provided by the invention, the process flow is simplified, the complex requirement on reaction equipment is overcome, the reaction is carried out in a mild and safe environment, the content and the yielding rate of the product are improved by a large margin, and the yielding rate is up to more than 95%. The prepared product is convenient to store and transport and is suitable for industrial production in mass.

Description

technical field [0001] The invention relates to a preparation method of an initiator for high polymer synthesis, in particular to a preparation method of emulsion-type peroxydicarbonate bis(2-ethylhexyl) (EHP). Background technique [0002] With the rapid development of the domestic polymer synthesis industry, the quality and demand of initiators for polymer synthesis have increased rapidly. As we all know, azo initiators, such as azobisisobutyronitrile and azobisisoheptanonitrile (ABVN), have long been used as initiators for the synthesis of high polymers such as polyvinyl chloride. However, azo initiators have insurmountable shortcomings such as low activity and high toxicity, which affect the quality of high polymers such as polyvinyl chloride products, and the toxic substances in the production process are seriously poisonous to the human body. [0003] Emulsion-type bis(2-ethylhexyl) peroxydicarbonate (EHP), as a kind of initiator for polymer synthesis, compared with o...

Claims

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Application Information

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IPC IPC(8): C08F4/38
Inventor 侯永正翟少华倪啟化许淑女
Owner LINZIZHENGHUA ACCESSORY INGREDIENT ZIBO
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