| 摘要 |
PROBLEM TO BE SOLVED: To provide water absorbing resin having a small water soluble quantity, and a method for manufacturing the water absorbing resin with good productivity. SOLUTION: In the method of manufacturing the water absorbing resin, an aqueous solution D containing at least one kind of monomer component A selected from a group comprising unsaturated carboxylic acid and its salt, a compound B having at least two unsaturated groups in one molecule, and a compound C having at least two functional groups that can react with a carboxyl group, in one molecule, is polymerized to simultaneously satisfy the following conditions (1)-(3): (1) the mol ratio of B/C is within a range of 2×10<SP>-3</SP>-300, (2) polymerization is initiated with a redox polymerization initiator, and (3) the maximum reaction temperature is within a range of 60-100°C. COPYRIGHT: (C)2005,JPO&NCIPI
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