发明授权
- 专利标题: Water absorbent and producing method of same
- 专利标题(中): 吸水剂及其制备方法
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申请号: US12805685申请日: 2010-08-13
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公开(公告)号: US08497226B2公开(公告)日: 2013-07-30
- 发明人: Kazushi Torii , Hirofumi Shibata , Taku Iwamura , Yoshio Irie , Yorimichi Dairoku , Yoshiro Mitsukami , Sayaka Machida
- 申请人: Kazushi Torii , Hirofumi Shibata , Taku Iwamura , Yoshio Irie , Yorimichi Dairoku , Yoshiro Mitsukami , Sayaka Machida
- 申请人地址: JP Osaka-shi
- 专利权人: Nippon Shokubai Co., Ltd.
- 当前专利权人: Nippon Shokubai Co., Ltd.
- 当前专利权人地址: JP Osaka-shi
- 代理机构: Harness, Dickey & Pierce, P.L.C.
- 优先权: JP2003-329109 20030919; JP2003-329110 20030919
- 主分类号: B01J20/26
- IPC分类号: B01J20/26 ; C08F20/06
摘要:
An object of the present invention is to provide a water absorbent having excellent gel properties and showing excellent properties when used in a water-absorbing material of a sanitary/hygienic material such as paper diaper. Moreover, another object of the present invention is to provide a water absorbent which is safe and excellent in liquid permeability, and in which an amount of liquid permeability improver for improving the liquid permeability is reduced. The water absorbent is made from a water-absorbing resin prepared by a specific polymerization method and having a high degree of cross-linking, a high liquid holding property and a high gel strength (its swelling pressure of gel layer of is 35 kdyne/cm2 or more). This water absorbent is further processed to have a particular particle size distribution (95 wt % or more of its particles are less than 850ƒÊm but not less than 106ƒÊm, and logarithmic standard deviation (ƒĐƒÄ) is in a range of 0.25 to 0.45) and then surface cross-linked. After that, a liquid permeability improver is added therein.
公开/授权文献
- US20100308263A1 WATER ABSORBENT AND PRODUCING METHOD OF SAME 公开/授权日:2010-12-09