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Salt-tolerant acrylic absorbent resin and method for preparing same

A technology of water-absorbent resin and acrylic acid, which is applied in the direction of chemical instruments and methods, and other chemical processes, can solve the problems of single type of chelating ions, single product function, and poor absorption capacity of chelating agents, so as to broaden adaptability and improve surface coagulation. Adhesive strength and the effect of improving the liquid absorption capacity

Active Publication Date: 2011-08-17
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the above-mentioned treatment method can improve the absorption capacity for physiological saline solution, the water-absorbent resin product disclosed in the above-mentioned patent application has poor absorption capacity for solutions containing various ions, and the product has a single function
For example, in the method for producing water-absorbent resin disclosed in patent application CN 101155840A, a chelating agent such as amino polycarboxylic acid and its salts is used to chelate ions to increase the liquid absorption capacity of the water-absorbent resin in the above-mentioned ionic solution, but this type of chelating The chelating agent has a single type of chelating ion and will be lost in the solution

Method used

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  • Salt-tolerant acrylic absorbent resin and method for preparing same
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Examples

Experimental program
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Effect test

Embodiment 1

[0032]a) Add 2700g of high-purity acrylic acid and 800g of deionized water into a 10L reaction kettle with a stirrer and a jacket cooling device, and then slowly add 3100g of 32% by weight sodium hydroxide solution under stirring and cooling conditions Reactor for neutralization reaction.

[0033] b) The above sodium acrylate aqueous solution was fed into a jacketed double-arm kneader with a volume of 10 L and two sigma blades, and the air in the system was replaced with nitrogen while keeping the reaction liquid at 30°C. Then, while stirring the reaction liquid, 0.27 g of β-cyclodextrin, 0.54 g of N,N-methylenebisacrylamide, 8.1 g of potassium persulfate and 8.1 g of sodium bisulfite were added. Polymerization started quickly and the resulting hydrogel polymer was removed after 1 hour. The hydrogel polymer has been segmented into small pieces with a diameter of 3-10 mm.

[0034] c) The above-mentioned sodium acrylate hydrogel was quickly washed with 3 L of methanol, and fil...

Embodiment 2

[0038] a) Add 2700g of high-purity acrylic acid and 800g of deionized water into a 10L reaction kettle with a stirrer and a jacket cooling device, and then slowly add 3100g of 32% by weight sodium hydroxide solution under stirring and cooling conditions Reactor for neutralization reaction.

[0039] b) The above sodium acrylate aqueous solution was fed into a jacketed double-arm kneader with a volume of 10 L and two sigma blades, and the air in the system was replaced with nitrogen while keeping the reaction liquid at 30°C. Then, while stirring the reaction solution, 270 g of β-cyclodextrin, 0.54 g of N,N-methylenebisacrylamide, 8.1 g of potassium persulfate and 8.1 g of sodium bisulfite were added. Polymerization started quickly and the resulting hydrogel polymer was removed after 1 hour. The hydrogel polymer has been segmented into small pieces with a diameter of 3-10 mm.

[0040] c) The above-mentioned sodium acrylate hydrogel was quickly washed with 3 L of methanol, and f...

Embodiment 3

[0044] a) Add 2700g of high-purity acrylic acid and 800g of deionized water into a 10L reaction kettle with a stirrer and jacketed cooling device, and then slowly add 3752g of 32% by weight sodium hydroxide solution under stirring and cooling conditions Reactor for neutralization reaction.

[0045] b) The above sodium acrylate aqueous solution was fed into a jacketed double-arm kneader with a volume of 10 L and two sigma blades, and the air in the system was replaced with nitrogen while keeping the reaction liquid at 30°C. Then, while stirring the reaction solution, 27 g of β-cyclodextrin, 0.54 g of N,N-methylenebisacrylamide, 8.1 g of potassium persulfate and 8.1 g of sodium bisulfite were added. Polymerization started quickly and the resulting hydrogel polymer was removed after 1 hour. The hydrogel polymer has been segmented into small pieces with a diameter of 3-10 mm.

[0046] c) The above-mentioned sodium acrylate hydrogel was quickly washed with 3 L of methanol, and fi...

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Abstract

The invention discloses salt-tolerant acrylic absorbent resin which is prepared from an acrylic monomer solution comprising acrylic acid and acrylate and a comonomer. The salt-tolerant acrylic absorbent resin comprises a ring polymer compound, wherein the ring polymer compound is 0.01-10 weight percent of the weight of the acrylic acid. The invention further discloses a method for preparing the salt-tolerant acrylic absorbent resin, comprising the following steps: adding the comonomer, a cross-linking agent and an initiator to the acrylic monomer solution to carry out polymerization reaction,washing, drying and pulverizing gel resin generated from reaction, uniformly spraying a surface cross-linking solution to the pulverized resin, stirring, and carrying out cross linking to prepare theproduct which is the salt-tolerant acrylic absorbent resin, wherein the ring polymer compound is added during polymerization reaction or / and surface cross-linking. Due to the adoption of the method, the salt tolerance of the acrylic absorbent resin can be improved, the smell can be reduced, the water retention capacity and the contaminant resistance can be enhanced, the influence and the toxic side effect to the skin can be decreased.

Description

technical field [0001] The invention relates to a water-absorbing resin and a preparation method thereof. More specifically, the present invention particularly relates to a salt-tolerant acrylic water-absorbing resin and a preparation method thereof. Background technique [0002] Superabsorbent resin is a kind of macromolecule containing hydrophilic groups and cross-linked structure. It was first prepared by Fanta et al. by saponification of starch-grafted polyacrylonitrile. Application is limited. Later, Japan used acrylic acid instead of acrylonitrile to prepare a series of water-absorbing resins. Since then, the United States, Japan, and Europe have developed various water-absorbent resins with excellent performance, and have begun to industrialize them. Superabsorbent resin has strong water absorption capacity, can absorb water of a hundred times or even a thousand times its own weight, and has excellent water retention performance. Once it absorbs water and swells in...

Claims

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Application Information

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IPC IPC(8): C08J3/24C08F8/00B01J20/26B01J20/30C08B37/16C08F220/06
Inventor 李春张宏科张振威潘勇军董迎开华卫琦
Owner WANHUA CHEM GRP CO LTD
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