发明名称 |
PROCESS FOR PRODUCING WATER-ABSORBING RESIN |
摘要 |
A process for preparing a water-absorbent resin made from an alpha , beta -unsaturated carboxylic acid as an essential monomer characterized in that the process comprises allowing a metal chelating agent to be present at any step in the process in an amount of 0.001 to 6 parts by weight, based on 100 parts by weight of the alpha , beta -unsaturated carboxylic acid; and adding a reducing agent or an oxidizing agent thereto in an amount of 0.001 to 6 parts by weight, based on 100 parts by weight of the alpha , beta -unsaturated carboxylic acid before initiation of drying and/or during drying of a gelated product containing a water-absorbent resin obtained by polymerization.
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申请公布号 |
EP1466928(A1) |
申请公布日期 |
2004.10.13 |
申请号 |
EP20020793441 |
申请日期 |
2002.12.27 |
申请人 |
SUMITOMO SEIKA CHEMICALS CO., LTD. |
发明人 |
HANDA, MASAYOSHI;TANIGUCHI TAKAYASU;NAWATA, YASUHIRO;FUJIKAKE, MASATO |
分类号 |
A61F13/53;C08F6/00;A61F5/44;A61F13/15;A61F13/49;A61L15/18;A61L15/20;A61L15/60;C08F2/44;C08F20/04;C08F20/06;C08K3/18;C08K3/30;C08K3/32;C08K5/16;C08K5/17;C08L33/02;(IPC1-7):C08F6/00;C08L101/00 |
主分类号 |
A61F13/53 |
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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