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Water absorbing resin particles, method for manufacturing water absorbing resin particles, absorption body, absorptive article, and water-sealing material

A resin particle, water absorption technology, used in absorbent pads, thin material treatment, bandages, etc., can solve the problem of high absorption speed, and achieve the effects of reducing odor, good water absorption speed, and excellent handling.

Active Publication Date: 2014-04-02
SUMITOMO SEIKA CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the absorption capacity can be dealt with by adjusting the amount of the water-absorbent resin particles used, etc., but the absorption rate tends to depend largely on the inherent characteristics of the water-absorbent resin particles.

Method used

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  • Water absorbing resin particles, method for manufacturing water absorbing resin particles, absorption body, absorptive article, and water-sealing material
  • Water absorbing resin particles, method for manufacturing water absorbing resin particles, absorption body, absorptive article, and water-sealing material
  • Water absorbing resin particles, method for manufacturing water absorbing resin particles, absorption body, absorptive article, and water-sealing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0241] Prepare a round-bottom cylindrical separable flask with an inner diameter of 100 mm, equipped with a reflux cooler, a dropping funnel, a nitrogen gas introduction tube, and a stirring wing (coated with fluororesin on the surface) with four inclined paddles with a second-stage wing diameter of 50 mm. (hereinafter referred to as a round-bottom flask). 660 mL of n-heptane as a hydrocarbon dispersion medium was added to a round bottom flask, and 1.10 g of sorbitan monolaurate (manufactured by NOF Corporation, trade name Nonion LP-20R; HLB8.6) was added as a surfactant, The temperature was raised to 45°C to dissolve the surfactant in n-heptane.

[0242] On the other hand, 92 g (1.03 mol) of an 80.5% by mass aqueous acrylic acid solution as a water-soluble ethylenically unsaturated monomer was added to a beaker having an inner volume of 300 mL. While cooling the acrylic acid aqueous solution with ice water, 147.7 g of a 20.9% by mass sodium hydroxide aqueous solution was dro...

Embodiment 2

[0247]In a round bottom flask having the same structure as in Example 1, 660 mL of n-heptane was added as a hydrocarbon dispersion medium, and 1.10 g of sorbitan monolaurate (manufactured by NOF Corporation, trade name NonionLP- 20R; HLB8.6), warming up to 45°C to dissolve the surfactant in n-heptane.

[0248] On the other hand, 92 g (1.03 mol) of an 80.5% by mass aqueous acrylic acid solution as a water-soluble ethylenically unsaturated monomer was added to a beaker having an inner volume of 300 mL. While cooling the acrylic acid aqueous solution with ice water, 147.7 g of a 20.9% by mass sodium hydroxide aqueous solution was dropped into a beaker to neutralize 75 mol % of the acrylic acid. Then, 0.46 g of hydroxyethylcellulose (manufactured by Sumitomo Seika Co., Ltd., trade name AW-15F) as a water-soluble thickener, and 0.10 g (0.00037 mol) of potassium persulfate as a radical polymerization initiator were added to the beaker This is dissolved to prepare an aqueous solutio...

Embodiment 3

[0253] In a round bottom flask having the same structure as in Example 1, add 580 mL of n-heptane as a hydrocarbon dispersion medium, and add 0.97 g of sorbitan monolaurate (manufactured by NOF Corporation, trade name NonionLP-20R) as a surfactant. ; HLB8.6), warming up to 45°C to dissolve the surfactant in n-heptane.

[0254] On the other hand, 81.0 g (0.91 mol) of an 80.5% by mass aqueous acrylic acid solution as a water-soluble ethylenically unsaturated monomer was added to a beaker having an inner volume of 300 mL. While cooling the acrylic acid aqueous solution with ice water, 130.0 g of a 20.9% by mass sodium hydroxide aqueous solution was dropped into the beaker to neutralize 75 mol % of the acrylic acid. Thereafter, 0.09 g (0.00033 mol) of potassium persulfate as a water-soluble radical polymerization initiator was added and dissolved in the beaker to prepare a first aqueous solution. The polymer solid content of this 1st aqueous solution was 80.1 g, and the moisture ...

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Abstract

In the present invention, water absorbing resin particles are disclosed in which the speed of absorption of a physiological saline solution is 1-15 seconds, median particle size is 100-600[mu]m, and the amount of residual volatile components is no more than 1.5 by mass percent.

Description

technical field [0001] The present invention relates to a water-absorbing resin particle, a method for preparing the water-absorbing resin particle, an absorber, an absorbent article, and a waterproof material. Background technique [0002] Water-absorbent resin particles have been used in hygienic materials such as diapers and sanitary products, agricultural and gardening materials such as water-retaining materials and soil improvement materials, industrial materials such as waterproof materials for cables, and anti-condensation materials. In addition, in recent years, the application of water-absorbent resin particles has expanded to animal excrement treatment materials such as pet mats, toilet preparations for dogs and cats, simple toilets, fragrances, meat drip absorption sheets, preparations for moisturizing cosmetics, etc. . The properties required for the water-absorbent resin particles used in such applications include high water absorption, excellent water absorpti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/32C08J3/12
CPCC08F2/32C08J2333/00B01J20/261B01J20/265C08F220/06A61L15/28A61L15/48A61L15/26C08J3/12C08J3/075A61L15/60C08J2301/00C08F2/14C08F2/18C08F120/16C08J2333/02Y10T428/2982C08L33/00C08L1/286
Inventor 半田昌良谷村健二平郡笃小野田裕一
Owner SUMITOMO SEIKA CHEM CO LTD
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