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Synthesis method of water-soluble triene cross-linking agent and high-temperature resistant water-absorbing resin

A technology of triene crosslinking agent and synthesis method, which is applied in the direction of organic chemistry and the preparation of functional groups substituted with amino groups, can solve the problems of high temperature resistance, achieve good product performance, broaden the application range, and mild reaction conditions

Inactive Publication Date: 2014-03-26
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the defect that the existing water-absorbent resins cannot withstand high temperatures after absorbing water, the purpose of the present invention is to provide a method for synthesizing water-soluble and heat-resistant crosslinking agents without amide bonds and a method for synthesizing high-temperature-resistant water-absorbent resins. Resin has good water absorption performance at high temperature

Method used

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  • Synthesis method of water-soluble triene cross-linking agent and high-temperature resistant water-absorbing resin
  • Synthesis method of water-soluble triene cross-linking agent and high-temperature resistant water-absorbing resin
  • Synthesis method of water-soluble triene cross-linking agent and high-temperature resistant water-absorbing resin

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Experimental program
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Effect test

Embodiment 1

[0026] Add 18.8g (0.1mol) of triaminopropylamine, 40g of water, and 0.42g of cetyltrimethylammonium chloride into the reaction flask, stir and mix evenly, control the reaction temperature at 30-35°C, and drop in 4h Add 24.1 g (0.315 mol) of chloropropene, control the reaction temperature not to exceed 35°C, continue stirring until the system is transparent after adding chloropropene dropwise, and obtain an aqueous solution of a water-soluble triene crosslinking agent with an effective concentration of about 50.4%.

Embodiment 2

[0028] Add 28.2g (0.15mol) of triaminopropylamine, 60g of water, and 0.63g of dodecyldimethylbenzyl ammonium chloride into the reaction flask, stir and mix evenly, control the reaction temperature at 30-35°C, in 4h Add 36.1 g (0.472 mol) of allyl chloride dropwise, and control the reaction temperature not to exceed 35°C. After the addition of allyl chloride, continue stirring until the system is transparent, and then an aqueous solution of a water-soluble triene crosslinking agent is obtained, with an effective concentration of about 50.5%.

Embodiment 3

[0030] Add 50g of acrylic acid into the reaction kettle, and then neutralize it with 20% sodium hydroxide solution, the neutralization degree is 70%, add 10g of acrylamide and 0.2g of water-soluble triene crosslinking agent aqueous solution after cooling to room temperature (Example 1), add 0.075g of azobisisobutylimidazoline hydrochloride and 0.025g of ammonium persulfate after 30 minutes of nitrogen gas flow, stop feeding nitrogen gas after 10 minutes, and take out the product after 4 hours and place it in an 80°C Dry and pulverize in a vacuum oven to obtain a high-temperature-resistant water-absorbing resin. The water absorption rate was measured by the natural rate method, and the water absorption rate in distilled water at 300°C was 262g / g, and the water absorption rate in 0.9% NaCl was 75g / g.

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Abstract

The invention discloses a synthesis method of a water-soluble triene cross-linking agent. The synthesis method comprises the following steps: adding triaminopropylamine (trpn), water and cationic surfactant into a reactor, evenly stirring and mixing, controlling the reaction temperature in a range of 30 to 35 DEG C, dropwise adding chloropropene into the reactor within 4 hours, controlling the temperature under 35 DEG C, and keeping on stirring until the solution turns transparent after the adding of chloropropene so as to obtain the triene cross-linking agent. The invention also provides a synthesis method of a high-temperature resistant water-absorbing resin by using the triene cross-linking agent. The synthesis method comprises the following steps: adding a mixed solution of copolymerization monomers and the triene cross-linking agent into a reactor, introducing nitrogen gas for 30 minutes, then adding an initiator, stopping introducing nitrogen gas after 10 minutes, carrying out reactions for 4 hours at a room temperature so as to obtain a reaction product, subjecting the reaction product to an extruding and granulating process, drying the granules at a temperature of 80 DEG C, and finally grinding the dried granules so as to obtain the high-temperature resistant water-absorbing resin. The synthesis method of water-absorbing resin has the advantages of simple process and low energy consumption, the saturated water absorption rate of the resin in distilled water with a temperature of 300 DEG C is 150 to 400 g / g, and the saturated water absorption rate of the resin in a NaCl water solution with a mass percentage of 0.9% is 50 to 130 g / g.

Description

technical field [0001] The invention relates to the technical field of functional polymer materials, in particular to a method for synthesizing a water-soluble triene crosslinking agent and a high-temperature-resistant water-absorbing resin. Background technique [0002] Water-absorbent resin is a very practical functional polymer material. It has a high water absorption function of absorbing water hundreds to thousands of times heavier than itself, and has good water retention performance. It is used in sanitary products, agriculture, forestry, medicine, aerospace, oil exploration, etc. industry has a wide range of applications. [0003] At present, the synthesis of most water-absorbent resins uses N,N-methylenebisacrylamide as a crosslinking agent, but N,N-methylenebisacrylamide contains amide bonds, and the cross-linked amide bonds are When it is high, it is easy to hydrolyze, which leads to the complete dissolution of the water-absorbing resin at high temperature, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C209/08C07C211/21C08F220/06C08F220/56C08F226/02C08F220/58
Inventor 张晓云王向鹏武纪辉吴伟陈文婷张思思郑云香冯建戈
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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