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Preparation method of super absorbent resin with high return permeability resistance

A high water-absorbent resin and back seepage technology, applied in the direction of absorbent pads, etc., can solve the problems of affecting product application experience and large amount of back seepage, so as to improve the liquid absorption speed and anti back seepage performance, excellent anti back seepage performance, The effect of shortening the polymerization reaction time

Active Publication Date: 2017-05-31
JIANGSU SAILBOAT PETROCHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, superabsorbent resin has developed rapidly, and the number and production capacity of domestic superabsorbent resin production facilities are gradually expanding. However, existing products usually have the problem of large rewet volume under certain pressure after water absorption and swelling, which is serious. Affected the application experience of the product

Method used

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  • Preparation method of super absorbent resin with high return permeability resistance

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Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1, a kind of preparation method of superabsorbent resin with high anti-back seepage performance, its steps are as follows:

[0020] (1) After diluting acrylic acid with water, add sodium hydroxide in an ice-water bath to neutralize to obtain a neutralization solution. The neutralization degree of the neutralization solution is 0%-80%, and the mass of acrylic acid accounts for 20% of the total mass of the neutralization solution. %-35%;

[0021] (2) After adding composite photoinitiator, crosslinking agent and foaming agent into the neutralization solution and stirring evenly, carry out polymerization reaction under UV light irradiation, control the polymerization initiation temperature at 0-60°C, and obtain hydrogel; The quality of the composite photoinitiator is 0.001%-0.3% of the total amount of acrylic acid in the neutralizing solution; the quality of the crosslinking agent is 0.01%-0.6% of the total amount of acrylic acid in the neutralizing solution; the...

Embodiment 2

[0024] Embodiment 2, a preparation method of a superabsorbent resin with high anti-back seepage performance, the steps are as follows:

[0025] (1) After diluting 200g of high-purity acrylic acid with 466g of water, add 150g of 50% sodium hydroxide in an ice-water bath to neutralize to obtain a neutralizing solution;

[0026] (2) Add 0.05g of 2,2-dimethoxy-2-phenylacetophenone, 0.8g of sodium persulfate, 0.4g of polyethylene glycol 600 and 2g of sodium bicarbonate into the neutralization solution and stir well , control the polymerization initiation temperature at 7°C, initiate the polymerization reaction under UV light irradiation, the UV light wavelength is 150-350nm, and obtain a hydrogel after 30 minutes of light irradiation;

[0027] (3) Add the hydrogel to the rubber cutting granulator to make granules, and add 10g of sodium carbonate evenly during the granulation process to adjust the neutralization degree of the acrylic acid monomer in the gel, so that the pH value of ...

Embodiment 3

[0029] Embodiment 3, a preparation method of a superabsorbent resin with high anti-back seepage performance, the steps are as follows:

[0030] (1) After diluting 190g of high-purity acrylic acid with 515g of water, add 84g of 50% sodium hydroxide in an ice-water bath to neutralize to obtain a neutralizing solution;

[0031] (2) Add 0.04g of 2,2-dimethoxy-2-phenylacetophenone, 0.75g of sodium persulfate, 0.36g of polyethylene glycol 400 and 2.5g of sodium bicarbonate into the neutralizing solution and stir well Finally, the polymerization initiation temperature was controlled at 6°C, and the polymerization reaction was initiated under UV light irradiation, and the hydrogel was obtained after 30 minutes of light irradiation;

[0032] (3) Add the hydrogel to the rubber cutting granulator to make granules, and add 63g of 50% sodium hydroxide evenly during the granulation process to adjust the neutralization degree of the acrylic acid monomer in the gel, so that the pH of the gel ...

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Abstract

The invention relates to a preparation method of super absorbent resin with high return permeability resistance. The method comprises the following steps: neutralizing an acrylic acid aqueous solution by using alkali, adding a composite initiator, a crosslinking agent and a foaming agent, and performing polymerization reaction under UV light irradiation; cutting up and pelleting hydrogel after polymerization, adding a gel cutting aid in the cut-up process, drying and pulverizing to obtain primary granules of super absorbent resin; and spray-coating the surfaces of the primary granules with surface crosslinking liquid, and performing reaction at high temperature to obtain a final product of the super absorbent resin. The super absorbent resin prepared by the method has the characteristics of high absorbing rate, high absorbing speed, high water-retaining property, excellent return permeability resistance and the like.

Description

technical field [0001] The invention relates to a preparation method of a polyacrylate superabsorbent resin, in particular to a preparation method of a superabsorbent resin with high anti-back seepage performance. Background technique [0002] Superabsorbent resin is a new generation of water-absorbing functional polymer materials after traditional water-absorbing materials such as cotton and sponge. Compared with traditional water-absorbent materials, the absorption capacity of superabsorbent resin can reach hundreds of times its own weight, and it has better water retention performance after absorbing water, and it can also achieve higher absorption capacity under pressurized conditions. Benefit from its three-dimensional network elastic structure characteristics containing a large number of hydrophilic groups. In recent years, superabsorbent resin has developed rapidly, and the number and production capacity of domestic superabsorbent resin production facilities are grad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/12C08J7/00C08J3/24C08J9/08C08J9/10C08J9/04C08F120/06C08F220/06C08F2/48A61F13/53C08L33/02
Inventor 王翔朱富军王奎奎唐德荣韩卫王英苗
Owner JIANGSU SAILBOAT PETROCHEMICAL CO LTD
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