发明名称 |
METHOD FOR PRODUCING WATER-ABSORBING RESIN, AND WATER-ABSORBING RESIN OBTAINED BY SAME |
摘要 |
<p>A method for producing a water-absorbent resin including the step of subjecting a water-soluble ethylenically unsaturated monomer to a reversed phase suspension polymerization in a petroleum hydrocarbon dispersion medium in the presence of a radical polymerization initiator and a dispersion stabilizer, wherein the method is characterized by the use of an ether-ester type nonionic surfactant as the dispersion stabilizer, and a water-absorbent resin obtained by the method, wherein the water-absorbent resin has a water-retention capacity of saline solution of 25 g/g or more, a water-absorption rate of saline solution of 50 seconds or less, and a flow index under moisture absorption of 70% or more. According to the method of the present invention, a water-absorbent resin having high water-retention capacity, excellent water-absorption rate, and further having excellent flowability under moisture absorption can be produced. The water-absorbent resin having the specified physical properties as described above can enhance properties of hygienic materials, and the resin can be suitably used in the production of the hygienic materials.</p> |
申请公布号 |
EP2752430(A4) |
申请公布日期 |
2015.04.15 |
申请号 |
EP20120828832 |
申请日期 |
2012.08.23 |
申请人 |
SUMITOMO SEIKA CHEMICALS CO., LTD. |
发明人 |
HANDA, MASAYOSHI;TAKATORI, JUNICHI |
分类号 |
C08F2/32;A61L15/60;B01J20/26;C08F2/30;C08J3/24 |
主分类号 |
C08F2/32 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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