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Method for preparing absorbent resin

A water-absorbing resin and water-absorbing technology, which can be used in fire protection equipment and other directions, can solve problems such as the inability to meet the requirements of high temperature thermal stability coal seam adhesion performance

Inactive Publication Date: 2010-09-22
ZHEJIANG WEILONG POLYMER MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the performance of superabsorbent resins used in daily sanitary products, agriculture and forestry, cables, etc. in the prior art cannot meet the above requirements, especially the two aspects of high temperature thermal stability and adhesion to coal seams. performance requirements

Method used

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  • Method for preparing absorbent resin

Examples

Experimental program
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preparation example Construction

[0014] The preparation method of the super absorbent resin for coal mine fire prevention and fire extinguishing according to the present invention includes the following preparation steps:

[0015] In the first step, three vinyl monomers of acrylic acid, acrylamide and methylol acrylamide are first mixed in water, and then trimethylol propyl acrylate primary crosslinking agent is mixed in water to form a mixed reaction system. Among them, acrylic acid, acrylamide, and methylol acrylamide account for 60-90%, 39-9%, and 20-1% of the total mass of the three vinyl monomers, respectively. The amount of trimethylol propyl acrylate is 0.01-0.1% of the total mass of the three ethylene monomers; then, neutralize with sodium hydroxide to adjust the acid value of the reaction system, use peroxide to initiate the polymerization reaction, that is, add a radical polymerization initiator A free radical quaternary copolymerization reaction occurs, the temperature of the polymerization reaction i...

Embodiment 1

[0022] In a 1000ml three-necked flask with stirring, a thermometer, and a dropping funnel containing a 42% concentration of 200g sodium hydroxide solution, add 100ml of distilled water, turn on the stirring, and then slowly pour 200ml of acrylic acid, 60g of acrylamide, 10 Grams of methylol acrylamide and 0.02 grams of trimethylol propyl acrylate, stir to dissolve, add 0.81 grams of sodium persulfate, pour the mixture into a stainless steel pan, and then put it in an oven for polymerization to control the polymerization The temperature is 50-100°C, the polymerization reaction time is 2-4 hours, and finally a gel product is obtained.

[0023] The gel product is cut, dried, crushed, and sieved to obtain a preliminary water-absorbent resin product; the preliminary water-absorbent resin product is subjected to secondary crosslinking treatment with epichlorohydrin to obtain a water-absorbent resin product.

Embodiment 2

[0025] In a 1000ml three-necked flask with stirring, a thermometer, and a dropping funnel containing a 42% concentration of 200g sodium hydroxide solution, add 100ml of distilled water, turn on the stirring, and then slowly pour 200ml of acrylic acid, 40g of acrylamide, 10 Grams of methylol acrylamide and 0.02 grams of trimethylol propyl acrylate, stir to dissolve, add 0.70 grams of sodium persulfate, pour the mixture into a stainless steel pan, and then put it in an oven for polymerization reaction, control the polymerization The temperature is 50-100°C, the polymerization reaction time is 2-4 hours, and finally a gel product is obtained.

[0026] The gel product is cut, dried, crushed, and sieved to obtain a preliminary water-absorbent resin product; the preliminary water-absorbent resin product is subjected to secondary crosslinking treatment with epichlorohydrin to obtain a water-absorbent resin product.

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Abstract

The invention relates to a method for preparing an absorbent resin. The method is characterized by comprising the following steps of: (1) preparing a gel product, wherein the gel product is prepared by mixing various vinyl monomers and a primary cross-linking agent in water, neutralizing the mixture by using alkaline solution and performing polymerization initiated by using hyperoxide; (2) cutting, drying and crushing the gel product to obtain the crude absorbent resin; and (3) performing secondary cross-linking treatment on the crude absorbent resin to obtain the absorbent resin. The absorbent resin of the invention has the advantages of high water absorbing capacity, thermal stability and bonding performance with coals.

Description

Technical field [0001] The invention relates to a preparation method of a water-absorbent resin, in particular to a preparation method of a water-absorbent resin used for fire prevention and fire fighting in coal mines. Background technique [0002] Coal is the main energy source in our country. The natural conditions of our coal mines are poor and the geological conditions are complex. The mainland of China is formed by the convergence of many small plots. The main coal fields have undergone multiple phases, multiple directions, and greater intensity. The geological conditions of the coal fields are complex and there are many associated disasters. Among them, the coal seams have the risk of spontaneous combustion. The mines accounted for 55%. In the process of coal mining in my country, preventing spontaneous combustion of coal seams is a very important safety issue. [0003] In terms of safety technology for coal mine fire prevention and control, there is a method for preventin...

Claims

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Application Information

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IPC IPC(8): C08L33/02C08K5/053C08K5/1515C08J3/24C08F220/06C08F220/56C08F220/58A62D1/00C09K21/14
Inventor 叶明生叶利生周小燕吴勤民周志芳
Owner ZHEJIANG WEILONG POLYMER MATERIAL
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