发明名称 |
Surface treatment method for water-absorbing resin and production method for water-absorbing resin |
摘要 |
The present invention provides a surface treatment method for a water-absorbing resin comprising three steps of: 1) a humidifying and mixing step for mixing a base polymer and a surface cross-linking agent solution to obtain a "humidified substance"; 2) a pretreatment step for raising temperature of said humidified substance to obtain a "pretreated substance"; and 3) a surface cross-linking reaction step for cross-linking said pretreated substance to obtain a surface cross-linked "water-absorbing resin"; wherein dew point in the pretreatment step of the above 2) is from 50° C. to 95° C., and temperature of said humidified substance is raised from temperature below the dew point up to a temperature of 10° C. higher than the dew point.
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申请公布号 |
US8546492(B2) |
申请公布日期 |
2013.10.01 |
申请号 |
US20090937056 |
申请日期 |
2009.04.10 |
申请人 |
MOTOYAMA ATSUSHI;KATO SEIJI;MATSUMOTO MAKOTO;KAWANO TAKAAKI;IRIE YOSHIO;NIPPON SHOKUBAI, CO., LTD. |
发明人 |
MOTOYAMA ATSUSHI;KATO SEIJI;MATSUMOTO MAKOTO;KAWANO TAKAAKI;IRIE YOSHIO |
分类号 |
C08J3/24;C08F20/06;C08L33/02 |
主分类号 |
C08J3/24 |
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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