Title:
粒子状吸水剤及びその製造方法
Document Type and Number:
Japanese Patent JP5731522
Kind Code:
B2
Abstract:
Provided is a water-absorbing agent having enhanced performance in both the centrifuge retention capacity and the absorption against pressure (particularly, the vertical diffusion absorption amount) of a water-absorbing resin, and also, a water-absorbing agent which can provide an absorbent core having a large absorption amount in a diaper, having improved diffusibility and liquid permeability, and having a smaller re-wet amount, is provided at low cost. Disclosed is a particulate water-absorbing agent containing a surface-crosslinked polyacrylic acid (salt)-type water-absorbing resin as a main component, and containing at least one spacer selected from a polycation and water-insoluble fine particles, the particulate water-absorbing agent satisfying an free swell capacity (FSC) of 55 to 65 [g/g], an absorption against pressure (AAP-4.83 kPa) of 20 to 30 [g/g], and a vertical diffusion absorption amount under pressure (VDAUP-4.83 kPa) of 30 to 80 g.
Inventors:
Katsuyuki Wada
Yasuhisa Nakajima
Yasuhisa Nakajima
Application Number:
JP2012536595A
Publication Date:
June 10, 2015
Filing Date:
September 30, 2011
Export Citation:
Assignee:
Nippon Shokubai Co., Ltd.
International Classes:
B01J20/26; A61F13/15; A61F13/49; A61F13/53; B01J20/30; C08J3/12; C08J3/24
Domestic Patent References:
| JP2005105254A | 2005-04-21 | |||
| JPH1128355A | 1999-02-02 | |||
| JP2004261796A | 2004-09-24 | |||
| JP2006057075A | 2006-03-02 | |||
| JP2009227885A | 2009-10-08 |
Foreign References:
| WO2008120742A1 | 2008-10-09 | |||
| WO2009113672A1 | 2009-09-17 |
Attorney, Agent or Firm:
Hatta International Patent Corporation
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