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High water absorptive resin for sanitary material

A technology of superabsorbent resin and hygienic materials, applied in the field of superabsorbent resin, can solve problems such as gel strength, dryness, breathability, unsatisfactory water retention, failure to meet high requirements for hygienic materials, and slow liquid absorption speed. The production process is simple and easy to control, the water retention performance is good, and the gel strength is strong

Active Publication Date: 2006-01-04
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the superabsorbent resin currently used in sanitary products, even if it is an imported product, still has the disadvantages of low gel strength and slow liquid absorption speed.
Although there are several domestic manufacturers in small batch production, the products produced may have high liquid absorption rate but not fast liquid absorption rate, or fast liquid absorption rate but not high liquid absorption rate, and the particles are in the process of absorbing water. It will form so-called "agglomerates" like dough in water, or it cannot meet the high requirements of hygienic materials due to unsatisfactory properties such as gel strength, dryness, air permeability, and water retention.

Method used

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  • High water absorptive resin for sanitary material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1. Dissolve 130g of sodium hydroxide and 0.2g of silicon dioxide in 400g of water, add 300g of acrylic acid and 0.5g of hydroxyethyl acrylate dropwise, raise the temperature to 40-60°C for neutralization reaction, and then add 0.5-1% of N', N-methylenebisacrylamide solution 4g to obtain a reaction solution.

[0019] 2. Take 350 g of the reaction solution, add 100 g of 0.5-1% potassium persulfate solution, 100 g of 0.5-1% sodium bisulfite solution, heat to 75-85° C. Half an hour later, the polymerization product was dried to obtain the product resin.

[0020] 3. 100g of product resin is post-treated with 18g of surface treatment agent, and dried to obtain a super fast liquid-absorbing superabsorbent resin.

[0021] The product absorbs 0.9% salt water with a water absorption rate of 60g / g, absorbs 0.9% salt water for 75 seconds, and absorbs 0.9% salt water with a pressurized water absorption of 40g / g.

[0022] Among them, the water absorption rate is calculated by the f...

Embodiment 2

[0025] 1. Dissolve 150g of sodium hydroxide and 0.2g of silicon dioxide in 420g of water, add dropwise 320g of acrylic acid and 0.35g of hydroxyethyl acrylate, raise the temperature to 40-60°C for neutralization, and then add 0.5-1% of N', N-methylenebisacrylamide solution 6g to obtain a reaction solution.

[0026] 2. Take 380g of the reaction solution, add 100g of ammonium persulfate solution with a concentration of 0.5-1%, 100g of a sodium bisulfite solution with a concentration of 0.5-1%, and heat to 75-85°C for polymerization, and detonation occurs. Half an hour later, the polymerization product was dried to obtain the product resin.

[0027] 3. 100g of product resin is post-treated with 18g of surface treatment agent, and dried to obtain a super fast liquid-absorbing superabsorbent resin.

[0028] The product absorbs 0.9% salt water with a water absorption rate of 55g / g, absorbs 0.9% salt water for 75 seconds, and absorbs 0.9% salt water with a pressurized water absorpti...

Embodiment 3

[0030] 1. Dissolve 130g of sodium hydroxide and 0.2g of silicon dioxide in 410g of water, add 320g of acrylic acid and 0.32g of hydroxyethyl acrylate dropwise, raise the temperature to 40-60°C for neutralization reaction, and then add 0.5-1% of N', 4 g of N-methylenebisacrylamide solution, 2 g of diethylene glycol with a concentration of 0.5-1% to obtain a reaction liquid.

[0031] 2. Take 380g of the reaction solution, add 95g of potassium persulfate solution with a concentration of 0.5-1%, and 95g of sodium sulfite solution with a concentration of 0.5-1%, and heat to 75-85°C for polymerization, and implosion occurs. Half an hour later, the polymerization product was dried to obtain the product resin.

[0032] 3. 100g of product resin is post-treated with 18g of surface treatment agent, and dried to obtain a super fast liquid-absorbing superabsorbent resin.

[0033] The product absorbs 0.9% saline water with a water absorption rate of 50g / g, absorbs 0.9% saline water for 78s...

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Abstract

The present invention features that the high water absorption resin for sanitary material is prepared through polymerization with acrylic acid and hydroxyethyl acrylate as monomers, sodium hydroxide as neutralizing agent, cross-linking agent and initiator and inside water solution, and post-treatment with surface treating agent. The present invention has no pellet formed after absorbing water, high water absorption, high water absorbing speed, high water absorbed gel strength, high dry property, high air permeability and high water keeping performance without overflow of the absorbed water, even if in heating and pressurizing condition.

Description

technical field [0001] The invention relates to a functional polymer resin material, especially a superabsorbent resin suitable for use in hygienic materials. Background technique [0002] Superabsorbent resin is a water-swellable high molecular polymer containing strong hydrophilic groups such as carboxyl and hydroxyl groups and having a certain degree of crosslinking. It is insoluble in water or organic solvents, has strong water absorption and high water retention, and at the same time has the advantages of polymer materials. The superabsorbent resin has a large water absorption capacity, which can reach hundreds or even thousands of times of its own mass. The water absorption speed is fast, and a gel can be formed within a few seconds. Water, good stability to light, heat, acid and alkali, and good biodegradability. Internationally, since the United States Department of Agriculture-Northern Research Institute used cerium salt as an initiator t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F20/04C08F2/10C08F8/00C08K5/20
Inventor 路建美
Owner SUZHOU UNIV
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