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Preparation method of powdery, water-insoluble high hydroscopicity resin capable of adsorbing water, urine or blood and highly resisting etiolation

A technology of super absorbent resin and manufacturing method, used in absorbent pads, medical science, bandages, etc., can solve problems such as oxidation and yellowing, and achieve the effect of increasing fluidity and slowing down the phenomenon of yellowing.

Inactive Publication Date: 2007-05-30
FORMOSA PLASTICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems in the above-mentioned prior art, the main purpose of the present invention is to provide a powdery, water-insoluble, absorbable water, urine or blood and highly anti-yellowing super absorbent resin manufacturing method, To solve the problem that the superabsorbent resin disclosed in the prior art is prone to oxidation and cause yellowing, and to improve the performance of the superabsorbent resin in practical applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0044] step:

[0045] 1) Add 30g of acrylic acid and 32.4g of water into a 100cc conical flask; in addition, weigh 24.3g of 48% sodium hydroxide aqueous solution in a 100cc conical flask, and slowly add the acrylic acid aqueous solution into the sodium hydroxide aqueous solution for neutralization in an ice-cold environment ; At this time, the aqueous solution of acid group-containing monomers with a concentration of 42wt% (weight percent) was obtained, wherein 70mol% (mole percent) of acrylic acid was partially neutralized as sodium acrylate;

[0046] 2) Add 0.8g of calcium carbonate with a particle size of 10-5000μm and a whiteness of 78.1%, and stir it with a glass rod to evenly disperse it in the aqueous solution of sodium acrylate;

[0047] 3) Add 0.046g of glycerol polyethylene glycol triglycidyl ether (n=7) to the partially neutralized acrylic acid solution, and maintain the temperature at about 20°C;

[0048] 4) Add 0.016g of hydrogen dioxide, 0.2g of sodium bisulfite...

experiment example 2

[0054] step:

[0055] Repeat Experiment 1, but step 2) is changed to add 0.8g of magnesium carbonate with a particle size of 10-5000 μm, the whiteness is 77.8%, the rest is the same as Experiment 1, and a water-absorbent resin with high whiteness and high yellowing resistance can be obtained , the measured relative whiteness is 74.2%, placed in 70°C, 90% relative humidity for 24 hours, and the measured relative whiteness against yellowing is 73.9%.

experiment example 3

[0057] step:

[0058] Repeat Experiment 1, but step 2) is changed to add 0.2g of titanium dioxide with a particle size of 0.1-1000 μm, the whiteness is 82.2%, the rest is the same as Experiment 1, and a water-absorbent resin with high whiteness and high yellowing resistance can be obtained. The measured relative whiteness is 72.6%, placed in 70°C and 90% relative humidity for 24 hours, and the measured relative whiteness against yellowing is 72.5%.

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PUM

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Abstract

The invention discloses a making method of powder-shaped, insoluble, water, urine or blood adsorbable, high-etiolation resistant high-hydroscopicity resin, which is characterized by the following: adding high-whiteness insoluble inorganic salt powder in the manufacturing course; avoiding personal hygienic article from xanthating.

Description

technical field [0001] The invention relates to a superabsorbent resin, especially a powdery, insoluble in water, capable of absorbing water, urine or blood and highly resistant to yellowing. Background technique [0002] The superabsorbent resin has a strong water retention capacity and can absorb water of a hundred times or even a thousand times its own weight. After absorbing water, it can swell and maintain a non-flowing state. Even if pressure is applied to the superabsorbent resin, it will not leak , and the absorbed water can be slowly released in the atmosphere. Due to the above characteristics, superabsorbent resins were first used as soil water retention agents in agriculture and forestry. In recent years, due to considerable progress in the production technology of superabsorbent resins, they are also widely used as sanitary products such as diapers, Water-absorbing agents for adult incontinence products and women's hygiene products, and fresh-keeping application...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L3/02C08K3/32A61L15/22
Inventor 刘顺忠施凯耀黎元中吴政璋
Owner FORMOSA PLASTICS CORP
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