发明名称 |
PRODUCTION METHOD AND METHOD FOR ENHANCING LIQUID PERMEABILITY OF WATER-ABSORBING RESIN |
摘要 |
<p>A method for the production of a water-absorbing resin is to be provided which permits enhancement and stabilization of property, for example, liquid permeability, of a water-absorbing resin by a simple and convenient method without requiring change of raw materials or expensive facility investment. The method comprises a polymerization step for polymerizing an aqueous solution of acrylic acid (or salt thereof) to obtain a hydrogel cross-linked polymer; a drying step for drying the hydrogel cross-linked polymer to obtain a water-absorbing resin powder; a classification step for classifying the water-absorbing resin powder; and a surface cross-linking step for surface cross-linking the water-absorbing resin powder before or after the classification step, wherein electricity is eliminated in the classification step.</p> |
申请公布号 |
EP2338918(B1) |
申请公布日期 |
2015.06.03 |
申请号 |
EP20090814539 |
申请日期 |
2009.09.11 |
申请人 |
NIPPON SHOKUBAI CO., LTD. |
发明人 |
DAIROKU, YORIMICHI;NOGI, KOZO;KANZAKI, SYUJI;ISHIZAKI, KUNIHIKO;MATSUMOTO, KOJI;MITSUKAMI, YOSHIRO |
分类号 |
B65G51/02;B65G53/52;C08F6/00;C08F6/02;C08F20/06;C08F220/06;C08J3/24;C08L33/02;C08L101/14 |
主分类号 |
B65G51/02 |
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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