发明名称 |
Water-absorbent resin, hydropolymer, process for producing them, and uses of them |
摘要 |
The present invention provides a production process by which a water-absorbent resin of excellent quality can be obtained at a low cost by reasonable steps in aqueous solution polymerization. The process for producing a water-absorbent resin comprises the step of polymerizing an aqueous solution of water-absorbent resin-forming monomers including acrylic acid and/or its sodium salt as major components, wherein: (1) the aqueous solution has a monomer component concentration of not less than 45 weight %; (2) the polymerization is carried out while water is evaporated so that the ratio (concentration ratio) between a solid component concentration in a hydropolymer as formed by the polymerization and a solid component concentration in the aqueous monomer solution will not be less than 1.10; and (3) the solid component concentration in the hydropolymer as formed by the polymerization is not more than 80 weight %.
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申请公布号 |
US2002040095(A1) |
申请公布日期 |
2002.04.04 |
申请号 |
US20010917642 |
申请日期 |
2001.07.31 |
申请人 |
DAIROKU YORIMICHI;IRIE YOSHIO;FUJINO SHINICHI;FUJITA YASUHIRO;AZUMI TAKASHI;ISHIZAKI KUNIHIKO |
发明人 |
DAIROKU YORIMICHI;IRIE YOSHIO;FUJINO SHINICHI;FUJITA YASUHIRO;AZUMI TAKASHI;ISHIZAKI KUNIHIKO |
分类号 |
A61L15/24;C08F2/00;C08F20/06;(IPC1-7):C08L33/00 |
主分类号 |
A61L15/24 |
代理机构 |
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地址 |
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