发明名称 |
Surface crosslinking method of water-absorbing resin powder |
摘要 |
A surface crosslinking treatment method of a water-absorbing resin powder is disclosed that can overcome various problems in production encountered in the production of surface crosslinked water-absorbing resin powders on an industrial scale and can produce a water-absorbing resin powder having excellent physical properties without causing deterioration in physical properties of resin. The surface crosslinking treatment method of a water-absorbing resin powder includes adding a surface crosslinking agent to a water-absorbing resin powder and beat treating the mixture, wherein (1) the water-absorbing resin powder after the heat treatment is agitated and cooled under an air flow; (2) the water-absorbing resin powder after the heat treatment is cooled under an air flow, and at the same time, at least a part of fine particles of the water-absorbing resin powder and/or the residual crosslinking agent is removed by the air flow; or (3) the water-absorbing resin powder after the heat treatment is cooled and simultaneously agglomerated, and preferably an aqueous solution is added to the water-absorbing resin powder at a temperature of 40-100 DEG C during the cooling treatment. <IMAGE>
|
申请公布号 |
EP1462473(A1) |
申请公布日期 |
2004.09.29 |
申请号 |
EP20040005914 |
申请日期 |
2004.03.12 |
申请人 |
NIPPON SHOKUBAI CO., LTD. |
发明人 |
NOGI, KOZO;SAKAMOTO, SHIGERU;MIZUTANI, NORIAKI;DAIROKU, YORIMICHI;ISHIZAKI, KUNIHIKO |
分类号 |
C08J3/12;(IPC1-7):C08J3/12;A61L15/60 |
主分类号 |
C08J3/12 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|