发明名称 |
PARTICULATE WATER ABSORBING AGENT AND METHOD FOR PRODUCTION THEREOF, AND WATER ABSORBING ARTICLE |
摘要 |
A particulate water absorbing agent of the present invention includes a water absorbent resin, having a cross-linking structure, whose surface has been cross-linked by adding a surface treatment agent, wherein: (i) a mass average particle diameter (D50) ranges from 200 to 600 µm and 95 to 100 wt % of a particulate water absorbing agent whose particle diameter ranges from less than 850 µm to not less than 150 µm is contained with respect to 100 wt % of whole the particulate water absorbing agent, and (ii) a logarithmic standard deviation (ö) of particle size distribution ranges from 0.25 to 0.45, and (iii) a compressibility rate defined by a following equation ranges from 0 to 18 %, and (iv) a surface tension of a supernatant liquid obtained in 4 minutes after dispersing 0.5 g of the particulate water absorbing agent in 50 ml of physiological saline whose temperature is 20°C is 55 mN/m or more, the compressibility rate €‰ % = P ˆ’ A / P × 100 where P represents a tapped bulk density of the particulate water absorbing agent and A represents a loose bulk density of the particulate water absorbing agent. |
申请公布号 |
EP1721663(B1) |
申请公布日期 |
2016.12.14 |
申请号 |
EP20050709754 |
申请日期 |
2005.02.04 |
申请人 |
Nippon Shokubai Co.,Ltd. |
发明人 |
DAIROKU, Yorimichi;ADACHI, Yoshifumi;NOGI, Kozo;INOUE, Hiroki;WADA, Katsuyuki;IRIE, Yoshio |
分类号 |
B01J20/26;A61F13/53;A61L15/60;C08J3/24;C08K5/00;C08L101/14 |
主分类号 |
B01J20/26 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|