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A kind of acrylic acid water-absorbing resin and its preparation method and application

A water-absorbing resin, acrylic technology, used in bandages, polyether coatings, coatings, etc., can solve the problems of small bubbles, uneven foaming, unstable bubbles, etc., to speed up the water absorption process, and achieve uniform and thorough foaming. The effect of the foaming effect

Active Publication Date: 2019-11-15
南雄市沃太化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide an acrylic water-absorbent resin with high liquid-absorbing rate and high liquid-holding performance, which adopts the compounding method of chemical foaming agent and amphoteric gemini surfactant, as the foaming agent of acrylic water-absorbing resin, not only solves the problem of The simple chemical foaming agent has uneven foaming and unstable bubbles, and the bubbles are small and uniform, which effectively improves the stability of foamed acrylic

Method used

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  • A kind of acrylic acid water-absorbing resin and its preparation method and application
  • A kind of acrylic acid water-absorbing resin and its preparation method and application
  • A kind of acrylic acid water-absorbing resin and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0061] Embodiment one, a) 100kg acrylic acid and 92kg water are mixed into acrylic acid aqueous solution, then add 79kg lye to neutralize acrylic acid aqueous solution, obtain the incomplete neutralization liquid that contains acrylic acid;

[0062] b) Add 3.5kg of cross-linking agent pentaerythritol triallyl ether, 0.02kg of combined blowing agent sodium bicarbonate and 0.1kg of dicarboxymethyl-tetramethylethylenediamine to the neutralized liquid obtained in step a), and reduce Agent sodium sulfite 0.002kg, after mixing evenly, add comonomer allyl sulfonate 2kg, sodium methacryl sulfonate 8kg, after mixing evenly, add initiator ammonium persulfate 0.4kg, after carrying out aqueous solution polymerization for 20min, obtain water coagulation glue;

[0063] c) The hydrogel obtained in step b) is crushed with a jaw crusher, dried, crushed by a jet mill, and classified to obtain a primary acrylic water-absorbing resin;

[0064] d) Use water, glycerin, ethylene carbonate, and silv...

Embodiment 2

[0067] Embodiment 2, a) 100kg of acrylic acid and 102kg of water are mixed into an acrylic acid aqueous solution, and then 81kg of lye is added to neutralize the acrylic acid aqueous solution to obtain an incompletely neutralized solution containing acrylic acid;

[0068] b) Add 3.5kg of crosslinking agent ethylene glycol dimethacrylate, 0.02kg of combined foaming agent sodium bicarbonate and 0.1kg of dicarboxymethyl-tetramethylethylenediamine to the neutralized solution obtained in step a) , reducing agent sodium bisulfite 0.002kg, after mixing evenly, add comonomer acryloyloxyethyltrimethylammonium chloride 2kg, sodium methacrylate sulfonate 8kg, and then add initiator ammonium persulfate 0.4kg , after carrying out aqueous solution polymerization for 20min, a hydrogel is obtained;

[0069] c) The hydrogel obtained in step b) is crushed with a jaw crusher, dried, crushed by a jet mill, and classified to obtain a primary acrylic water-absorbent resin;

[0070] d) Use water, g...

Embodiment 3

[0073] Embodiment three, a) 100kg of acrylic acid and 101kg of water are mixed into an acrylic acid aqueous solution, and then 82kg of lye is added to neutralize the acrylic acid aqueous solution to obtain an incompletely neutralized solution containing acrylic acid;

[0074] b) Add 3.5kg of cross-linking agent pentaerythritol triallyl ether, 0.02kg of combined blowing agent sodium bicarbonate and 0.1kg of dicarboxymethyl-tetramethylethylenediamine to the neutralized liquid obtained in step a), and reduce Agent sodium sulfite 0.003kg, after mixing uniformly, add comonomer sodium methacrylate sodium sulfonate 2kg, sodium methacrylate sodium sulfonate 8kg, after mixing evenly, add initiator hydrogen peroxide 0.4kg, carry out aqueous solution polymerization after 30min, obtain hydrogel;

[0075] c) The hydrogel obtained in step b) is crushed with a jaw crusher, dried, crushed by a jet mill, and classified to obtain a primary acrylic water-absorbent resin;

[0076] d) Use water, g...

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Abstract

The invention relates to an acrylic water-absorbing resin, especially an acrylic water-absorbing resin with high liquid absorption rate and high liquid retention performance, its preparation method and application. The preparation raw materials include acrylic acid, alkali and water with a mass ratio of 1: (0.3-0.5): (1.5-2), and also: based on the mass of acrylic acid: crosslinking agent: 0.2-0.5wt%; combined foaming Agent: 0.04-0.4wt%; Copolymer: 1.5-12wt%; Reducing agent: 0.004-0.06wt%; Initiator: 0.01-0.8wt%; Inorganic water-conducting agent: 0.01-0.1wt%. The present invention greatly improves the performance of the prepared acrylic water-absorbing resin by combining the use of the foaming agent and the coating of the specific copolymer monomer and the inorganic water-conducting agent. And a water-absorbing pad using the resin is provided.

Description

technical field [0001] The invention relates to an acrylic water-absorbing resin, especially an acrylic water-absorbing resin with high liquid absorption rate and high liquid retention performance, its preparation method and application. Background technique [0002] Superabsorbent resin is a cross-linked polymer material containing a large number of polar groups. It contains strong hydrophilic groups such as hydroxyl and carboxyl groups, and is insoluble in water and organic solvents. It can absorb hundreds or thousands of times its own weight in water, and immediately swells into a hydrogel after absorbing water, which has excellent water retention. After more than half a century of development, the water-absorbent resin has been developed for more than half a century. From the initial grafting of starch to acrylonitrile in 1961, the grafting of acrylonitrile to starch or cellulose in 1971, the industrialization of water-absorbent resin in Japan in 1978, and the applicatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/06C08F216/12C08F228/02C08F222/14C08F220/34C08F222/20C08L33/02C08K5/053C08K5/109C08K3/28C08J9/36C08J9/08C08J3/24C09D171/08C09D7/62A61F13/532
CPCA61F13/5323C09D7/61C09D171/00C08F220/06C08J3/24C08J9/08C08J9/365C08K3/28C08K5/053C08K5/109A61F2013/530598C08J2203/02C08K3/34C08J2471/08C08J2333/02C08L33/02C08F222/102C08F220/34C08F228/02C08F222/1006C08F222/103
Inventor 李彬
Owner 南雄市沃太化工有限公司