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Title:
WATER-ABSORBENT RESIN AND ABSORBENT ARTICLE
Document Type and Number:
WIPO Patent Application WO/2018/159800
Kind Code:
A1
Abstract:
Provided is a water-absorbent resin that demonstrates high liquid-retaining capacity when under a load and has low flowback, even when used in an absorption body that has a low proportion of hydrophilic fibers. This water-absorbent resin is configured from a polymer of water-soluble ethylenic unsaturated monomers. When a cross-sectional image of the water-absorbent resin is observed by x-ray computed tomography, the fraction of the area of the cross-sectional image that is hollow portions (the hollow area ratio of the cross-sectional image), as calculated on the basis of formula (I), is no more than 10%. (I) Hollow area ratio [%]={total cross-sectional area (B) of hollow portions of the water-absorbent resin/(total cross-sectional area (A) of resin portions of the water-absorbent resin + total cross-sectional area (B) of hollow portions of the water-absorbent resin)}×100%.

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Inventors:
CHIBA MIKIHITO (JP)
ONODA YUICHI (JP)
Application Number:
PCT/JP2018/007959
Publication Date:
September 07, 2018
Filing Date:
March 02, 2018
Export Citation:
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Assignee:
SUMITOMO SEIKA CHEMICALS (JP)
International Classes:
B01J20/26; C08F20/06; B01J20/28; C08G59/42
Domestic Patent References:
WO2016111223A12016-07-14
Foreign References:
JP2014098172A2014-05-29
JP2007154350A2007-06-21
JP2003290290A2003-10-14
JPH03227301A1991-10-08
JP2017038979A2017-03-02
US20130026412A12013-01-31
US20170107313A12017-04-20
US20090281247A12009-11-12
EP2557095A12013-02-13
GB2267094A1993-11-24
JPH0340623B21991-06-19
EP0349241A21990-01-03
EP1609810A12005-12-28
EP0349240A21990-01-03
US4446261A1984-05-01
EP2011803A12009-01-07
EP2993191A12016-03-09
EP2998325A12016-03-23
EP3153529A12017-04-12
EP2993190A12016-03-09
EP0349240A21990-01-03
US4446261A1984-05-01
EP2011803A12009-01-07
EP2993191A12016-03-09
EP2557095A12013-02-13
GB2267094A1993-11-24
JPH0340623B21991-06-19
EP0349241A21990-01-03
EP1609810A12005-12-28
EP2998325A12016-03-23
EP3168241A12017-05-17
EP3153529A12017-04-12
EP2993190A12016-03-09
Other References:
H HOKOCI: "Application News No.N121 Industrial X-ray Inspection System Observations of Superabsorbent Polymers Using the inspeXio SMX-100CT Microfocus X-Ray CT System", SHIMADZU, JAPAN, 1 May 2013 (2013-05-01), Japan , pages 1 - 2, XP055768069, Retrieved from the Internet [retrieved on 20210122]
Attorney, Agent or Firm:
TANAKA, Junya et al. (JP)
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