发明名称 |
Water-absorbent resin and production process |
摘要 |
Water-absorbent resins having an average particle diameter of 100 to 600 mu m and a particle diameter distribution of 0.35 or less are prepared by polymerizing an aqueous solution of a water-soluble ethylenically unsaturated monomer, pulverizing and sieving the gel-like polymer so obtained, and crosslinking the surface of the polymer powder. In an alternative process, an aqueous solution of the monomer having a viscosity greater than 15 cps is dispersed in a hydrophobic organic solvent and polymerized to obtain a polymer powder, and the surface of the polymer powder is crosslinked.
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申请公布号 |
US5244735(A) |
申请公布日期 |
1993.09.14 |
申请号 |
US19920989722 |
申请日期 |
1992.12.11 |
申请人 |
NIPPON SHOKUBAI KAGAKU KABUSHIKI KAISHA |
发明人 |
KIMURA, KAZUMASA;NAGASUNA, KINYA;NAMBA, TAKASHI;KADONAGA, KENJI;MIYAKE, KOJI;SHIMOMURA, TADAO |
分类号 |
C08F2/32 |
主分类号 |
C08F2/32 |
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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