发明名称 Water-absorbent resin having treated surface and process for producing the same
摘要 An object of the present invention is to provide: a water-absorbent resin which can sufficiently overcome the problem of the gel blocking, can manifest sufficient absorption capacity without load and sufficient absorption capacity under load and, at the same time, can also exert excellent liquid permeability under load; and a process for producing the same. As a means of achieving this object, a first production process among the processes according to the present invention for producing a water-absorbent resin having a treated surface is a process comprising: a step of mixing a water-absorbent resin having an internal crosslinked structure obtained by polymerizing a monomer containing acrylic acid and/or a salt thereof as a main component, a complex containing a polyvalent metal atom as a central atom and an organic secondary crosslinking agent in the presence of an aqueous liquid; and a step of crosslinking a surface of the water-absorbent resin with the organic secondary crosslinking agent. And a second production process is a process comprising a step of mixing a water-absorbent resin having an internal crosslinked structure and a crosslinked surface obtained by polymerizing a monomer containing acrylic acid and/or a salt thereof as a main component, and a complex containing a polyvalent metal atom as a central atom in the presence of an aqueous liquid.
申请公布号 US2005070671(A1) 申请公布日期 2005.03.31
申请号 US20040941873 申请日期 2004.09.16
申请人 TORII KAZUSHI;IWAMURA TAKU;IKEUCHI HIROYUKI;MACHIDA SAYAKA 发明人 TORII KAZUSHI;IWAMURA TAKU;IKEUCHI HIROYUKI;MACHIDA SAYAKA
分类号 A61L15/60;C08F2/10;C08F8/00;(IPC1-7):C08F226/02 主分类号 A61L15/60
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