Preparation method of polyacrylic acid series water-absorbent resin

A polyacrylic acid-based technology and a manufacturing method, which are applied in the field of water-absorbent resins and their manufacturing, can solve problems such as increasing the cost of raw materials, and achieve the effect of reducing the increase in the cost of raw materials

Inactive Publication Date: 2018-04-27
宜兴丹森科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] In addition, foaming agents are only used as additives to prepare fast-absorbing water-absorbent resins, which will inevitably lead to an increase in raw material costs

Method used

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  • Preparation method of polyacrylic acid series water-absorbent resin
  • Preparation method of polyacrylic acid series water-absorbent resin
  • Preparation method of polyacrylic acid series water-absorbent resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0196]3.24 grams of concentration is 6.17wt% azobisisobutylamidine hydrochloride aqueous solution and 5.00 grams of concentration is 4.0wt% sodium persulfate solution mixed under room temperature stirring condition, azobisisobutylamidine hydrochloride and The mass ratio of sodium persulfate is 1:1, and the initiator-foaming agent particle dispersion (particle diameter<45 microns) is obtained, which is ready for use. 200 grams of acrylic acid monomer, 92 grams of deionized water and 244 grams of 32 wt % sodium hydroxide aqueous solution were weighed in sequence and added to a beaker with a volume of 2 liters, stirred evenly and set aside. Subsequently, 4.66 g of polyethylene glycol diacrylate (molecular weight: 522) with a concentration of 11.3 wt % was weighed and added to the partially neutralized monomer solution, and stirred evenly. After heating the monomer solution to 94°C, add the initiator-foaming agent particle dispersion to the monomer solution under agitation to carr...

Embodiment 2

[0199] 6.48 gram concentration is 6.17wt% azobisisobutylamidine hydrochloride aqueous solution and 7.12 gram concentration is 4.0wt% sodium persulfate solution after mixing at room temperature, azobisisobutylamidine hydrochloride and peroxide The mass ratio of sodium sulfate is 1:0.71, and the initiator-foaming agent particle dispersion (particle diameter<45 microns) is obtained, which is ready for use. 200 grams of acrylic acid monomer, 92 grams of deionized water and 244 grams of 32 wt % sodium hydroxide aqueous solution were weighed in sequence and added to a beaker with a volume of 2 liters, stirred evenly and set aside. Subsequently, 4.66 g of polyethylene glycol diacrylate (molecular weight: 522) with a concentration of 11.3 wt % was weighed and added to the partially neutralized monomer solution, and stirred evenly. After heating the monomer solution to 94°C, add the initiator-foaming agent particle dispersion to the monomer solution under agitation to carry out the pol...

Embodiment 3

[0206] The concentration of 1.62 grams of 6.17wt% azobisisobutylamidine hydrochloride solution and 7.12 grams of concentration of 4.0wt% sodium persulfate solution are mixed under stirring at room temperature, azobisisobutylamidine hydrochloride and The mass ratio of sodium persulfate is 1:2.84, and the initiator-foaming agent particle dispersion (particle diameter<45 microns) is obtained, which is ready for use. 200 grams of acrylic acid monomer, 92 grams of deionized water and 244 grams of 32 wt % sodium hydroxide aqueous solution were weighed in sequence and added to a beaker with a volume of 2 liters, stirred evenly and set aside. Subsequently, 4.66 g of polyethylene glycol diacrylate (molecular weight: 522) with a concentration of 11.3 wt % was weighed and added to the partially neutralized monomer solution, and stirred evenly. After heating the monomer solution to 94°C, add the initiator-foaming agent particle dispersion to the monomer solution under agitation to carry o...

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Abstract

The invention relates to a method for producing polyacrylic water-absorbing resin, which comprises obtaining an aqueous solution containing unsaturated acrylic monomers and a crosslinking agent; mixing the azo compound solution with the initiator solution, and then preparing a polyacrylic acid-based water-absorbing resin that is simultaneously used as an initiator and a foaming agent Initiator-foaming agent particle dispersion liquid, described azo compound solution is the compound solution that contains primary ammonia, secondary ammonia, tertiary ammonia or quaternary ammonium salt group, and described initiator solution is the solution that contains persulfate compound, The mass ratio of the azo compound component to the persulfate component is 100:1 to 1:100, and in the initiator-foaming agent particle dispersion, the number average particle size of the initiator-foaming agent particle The diameter is 0.1 to 900 microns; the initiator-foaming agent particle dispersion is mixed with the unsaturated acrylic monomer and the crosslinking agent aqueous solution to polymerize to prepare a hydrogel polymer, and the polymer is granulated and dried , crushing, sieving and surface crosslinking. A water-absorbent resin having a high liquid absorption rate and a composition thereof are obtained.

Description

technical field [0001] The present invention relates to a water-absorbent resin and its production method. Specifically suitable for absorbent articles, such as paper diapers (disposable diapers), sanitary napkins, incontinence pads, mattresses, pet pads, wound care materials, building materials, soil water retention materials and other products, and have rapid liquid absorption performance Water absorbent resin and its production method. Background technique [0002] Super absorbent polymer (SAP), also known as super absorbent resin, is a cross-linked polymer containing strong hydrophilic groups that is insoluble in water but can absorb tens, hundreds or even thousands of times its own weight. polymer. Superabsorbent resins are now widely used in various fields such as diapers, sanitary napkins, adult incontinence products and other sanitary products and soil moisturizers. At present, water-absorbent resins are known to include partially neutralized polyacrylic acid, hyd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08J3/24C08L51/08
CPCC08F283/065C08J3/245C08J2351/08C08F220/06
Inventor 顾子旭胡健徐亮徐科峰杭渊
Owner 宜兴丹森科技有限公司
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