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Water-absorbency resin composition

A resin composition and water-absorbing technology, applied in absorbent pads, medical science, bandages, etc., can solve problems such as deterioration, low liquid permeability or gel strength, urine leakage from disposable diapers, etc.

Inactive Publication Date: 2004-07-28
NIPPON SHOKUBAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem is that when a water-absorbent resin is used as an absorbent structure of a disposable diaper, the water-absorbent resin deteriorates with time, so that its liquid permeability or gel strength becomes low, causing urine to leak out of the disposable diaper
However, the existing technology only enhances the urine resistance, and as for the light resistance, it is the same as the result without adding glycine chelating agent

Method used

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  • Water-absorbency resin composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0118] Under stirring conditions, 60% sulfuric acid was added into a commercially available pentasodium diethylenetriaminepentaacetic acid aqueous solution (40% solid content) to adjust the pH to a range of 1.8 to 2. The resulting solution was left to stand for a while, and then deposited diethylenetriaminepentaacetic acid was filtered off, washed with pure water and dried at 60°C.

[0119] The total content of nitrilotriacetic acid (salt) in the commercially available diethylenetriaminepentaacetic acid pentasodium is about 5%, but through the above-mentioned treatment, the nitrilo group in the obtained diethylenetriaminepentaacetic acid The total content of triacetic acid (salt) was reduced to 35ppm of diethylenetriaminepentaacetic acid.

[0120] Add 0.05 parts of ethylene glycol diglycidyl ether, 1 part of propylene glycol, 3 parts of water and 1 part of isopropyl to 0.002 parts of diethylenetriaminepentaacetic acid obtained above with a reduced total content of nitrilotriac...

Embodiment 2

[0123] The water-absorbent resin composition (2) was obtained in the same manner as in Example 1, except that the amount of diethylenetriaminepentaacetic acid in the treatment agent solution was changed to 0.01 part (diethylenetriaminepentaacetic acid in the obtained composition The mixing ratio of the water-absorbent resin (A) is 100ppm).

[0124] The total content of nitrilotriacetic acid (salt) in the water absorbent resin composition (2) was measured. As a result, the content was equal to or less than 0.1 ppm of the composition, so it could not be measured. Table 1 shows the measurement results of physical properties of the water-absorbent resin composition (2).

Embodiment 3

[0126] Diethylenetriaminepentaacetic acid (obtained in Example 1) having a reduced total nitrilotriacetic acid (salt) content was dissolved in water to prepare a 0.07% aqueous solution. 3 parts of this solution was sprayed on 100 parts of the water-absorbent resin (B) (obtained in Reference Example 1), and then dried at 80°C to obtain a water-absorbent resin composition (3) (in which diethylenetriaminepentaacetic acid The mixing ratio is 21 ppm of the water absorbent resin (B).

[0127] The total content of nitrilotriacetic acid (salt) in the water absorbent resin composition (3) was measured. As a result, the content was equal to or less than 0.1 ppm of the composition, so it could not be measured. Table 1 shows the measurement results of physical properties of the water-absorbent resin composition (3).

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Abstract

The present invention provides a particulate water-absorbent resin composition, which comprises a water-absorbent resin and a water-soluble deodorant and exhibits an absorption capacity of not less than 30 g / g without load, an eluted deteriorated extractable content of not more than 20 weight %, an absorption capacity of not less than 28 g / g under a load of 1.9 kPa, and an offensive-odor reduction ratio of not less than 40 %.

Description

[0001] This application is a divisional application of the Chinese patent application with the application number CN00136418.9 and the invention name "water-absorbent resin composition". technical field [0002] The present invention relates to a water absorbent resin composition. Specifically, the present invention relates to a water-absorbent resin composition which is excellent in urine resistance and light resistance and which is less colored. In addition, the present invention relates to a water-absorbent resin composition also having excellent deodorizing ability. Background technique [0003] In recent years, water-absorbent resins have been widely used as components of hygienic articles such as disposable diapers, sanitary napkins, and incontinence sheets for the purpose of allowing the water-absorbent resins to absorb body fluids such as urine and menstrual blood. [0004] As for the above-mentioned water-absorbent resins, the following examples are known: partiall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L15/46A61L15/60C08K5/17
CPCA61L15/60A61L15/46C08K5/175C08L33/02
Inventor 三宅浩司藤野真一中村将敏和田克之
Owner NIPPON SHOKUBAI CO LTD
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