发明授权
- 专利标题： Water absorbing agent, water absorbent core using the agent, and manufacturing method for water absorbing agent
- 专利标题（中）： 吸水剂，使用该吸水剂的吸水芯，以及吸水剂的制造方法
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申请号： US12294328申请日： 2007-03-20
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公开(公告)号： US08198209B2公开(公告)日： 2012-06-12
- 发明人: Kazushi Torii , Hirofumi Shibata , Kazuki Kimura , Yasuhisa Nakashima , Motohiro Imura , Hiroko Ueda , Katsuyuki Wada
- 申请人： Kazushi Torii , Hirofumi Shibata , Kazuki Kimura , Yasuhisa Nakashima , Motohiro Imura , Hiroko Ueda , Katsuyuki Wada
- 申请人地址： JP Osaka
- 专利权人： Nippon Shokubai Co., Ltd.
- 当前专利权人： Nippon Shokubai Co., Ltd.
- 当前专利权人地址： JP Osaka
- 代理机构： Turocy & Watson, LLP
- 优先权： JP2006-085652 20060327; JP2006-188668 20060707; JP2006-355202 20061228
- 国际申请： PCT/JP2007/056527 WO 20070320
- 国际公布： WO2007/116777 WO 20071018
- 主分类号： B01J20/26
- IPC分类号： B01J20/26 ; B01J20/10 ; B32B5/24
摘要：
A water absorbing agent of the present invention has an internal crosslinking structure obtained by polymerization of a water-soluble unsaturated monomer. The agent satisfies conditions (a) to (d): (a) the agent contains water-insoluble inorganic particles at an amount of from 10 ppm to 1,900 ppm inclusive; (b) the agent contains 5 mass % or less particles which have such a size that they can pass through a sieve having a mesh opening size of 150 μm; (c) the agent has an absorbency against a pressure of 4.83 kPa (AAP) of 18 g/g or more; and (d) the water-insoluble inorganic particles reside on a surface of the water absorbing resin or near the surface.