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Method for production of modified water absorbent resin

一种生产方法、吸水性的技术，应用在吸收垫、医药科学、绷带等方向，能够解决不容易调节、难以均匀地分配内部交联等问题，达到简短时间间隔的效果

Inactive Publication Date: 2012-05-02
NIPPON SHOKUBAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Difficult to distribute internal crosslinks uniformly in polymers and not easy to adjust crosslink density

Method used

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  • Method for production of modified water absorbent resin
  • Method for production of modified water absorbent resin
  • Method for production of modified water absorbent resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0152] In a separable quartz flask, 10 g of a water-absorbent resin (A) as a base polymer was put and stirred with a stirring blade, and 1.05 g of a 23.8 wt % ammonium persulfate aqueous solution was added to the stirred base polymer. After stirring was continued for 15 minutes, an ultraviolet irradiation device (manufactured by Ushio Denki K.K. and sold under product code UV-152 / (sold under IMNSC3-AA06) at 60mW / cm 2 The thus-obtained stirred mixture was irradiated for 10 minutes at an irradiation intensity of , to obtain a surface-treated water-absorbent resin (1). The conditions of surface treatment and water absorption performance are shown in Table 3.

Embodiment 2

[0154] A surface-treated water-absorbent resin (2) was obtained by following the procedure of Example 1 while using 1.30 g of a 38.5% by weight aqueous solution of ammonium persulfate.

Embodiment 3

[0156] By following the procedure of Example 2 while changing the duration of irradiation with ultraviolet rays to 5 minutes, a surface-treated water-absorbent resin (3) was obtained.

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Abstract

This invention is to provide a method for producing a modified water absorbent resin excelling in water absorbing properties. This invention relates to a method for producing a modified water absorbent resin, which comprises a) mixing a water absorbent resin and a water-soluble radical polymerization initiator or a heat-degradable radical polymerization initiator without addition of an ethylenically unsaturated monomer and b) irradiating the resultant mixture with active energy rays. The method is particularly capable of exalting the absorbency against pressure and the saline flow conductivity.

Description

technical field [0001] The present invention relates to a production method of a modified water-absorbent resin, and more particularly to a method for mixing a water-soluble radical polymerization initiator or a thermally degradable radical polymerization initiator by irradiating active energy rays without adding an ethylenic non-olefinic resin. A method of modifying a water-absorbent resin by saturating the water-absorbent resin with a monomer. Background technique [0002] Hitherto, water-absorbent resins have been used as a component of sanitary materials such as sanitary napkins, disposable diapers, and absorbents for other types of body fluids. Specific examples of the water-absorbent resin include hydrolyzed products of starch-acrylonitrile graft polymers, neutralized starch-acrylic acid graft polymers, saponified vinyl acetate-acrylate copolymers, acrylonitrile copolymers, or acrylic acid copolymers. Hydrolyzed products of amide copolymers, and cross-linked products ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/28C08K5/23C08L101/14C08F8/44C08J3/24A61L15/60C08K3/30C08F6/00C08L33/02C08F220/06C08K5/14
CPCC08J2333/02C08L33/02C08J3/28C08J2300/14C08F8/44C08F20/06C08L2666/04C08F2/46A61L15/60C08F2/38C08F20/00
Inventor 松本诚光上义朗池内博之鸟井一司岩村卓安德鲁斯·弗洛赫妥斯恩·林达尔
Owner NIPPON SHOKUBAI CO LTD
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