发明名称 |
Production process for particulate water-absorbent resin |
摘要 |
The present invention provides: a production process for a particulate water-absorbent resin with high productivity, which production process is carried out in such a manner that the particulate water-absorbent resin will contain particles with particle diameters of 150 to 850 mum (but excluding 850 mum) in an amount of not smaller than 75 weight % of the particulate water-absorbent resin after the pulverization step or after the pulverization step and the drying step even if the adjustment of the particle diameters is not carried out by the sieving classification procedure; a novel particulate water-absorbent resin having high properties; and a sanitary material comprising this particulate water-absorbent resin. The production process for a particulate water-absorbent resin, according to the present invention, is carried out in such a manner that the particulate water-absorbent resin will contain particles with particle diameters of 150 to 850 mum (but excluding 850 mum) in an amount of not smaller than 75 weight % of the particulate water-absorbent resin after the pulverization step or after the pulverization step and the drying step; with the production process being characterized in that, in the pulverization step, a hydropolymer of a water-absorbent resin having a water content of 10 to 30 weight % is pulverized with a pulverizer.
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申请公布号 |
US6875511(B2) |
申请公布日期 |
2005.04.05 |
申请号 |
US20030443777 |
申请日期 |
2003.05.23 |
申请人 |
NIPPON SHOKUBAI CO., LTD. |
发明人 |
DAIROKU YORIMICHI;IRIE YOSHIO;TADA KENJI;FUJINO SHINICHI;NAGASAWA MAKOTO |
分类号 |
C08J3/12;(IPC1-7):B32B5/16 |
主分类号 |
C08J3/12 |
代理机构 |
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主权项 |
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地址 |
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