WATER-ABSORBING RESIN PARTICLES, PROCESS FOR PRODUCING SAME, AND ABSORBENT OBJECT AND ABSORBENT ARTICLE BOTH COMPRISING OR INCLUDING SAME

WIPO Patent Application WO/2017/200085

A1

Provided are water-absorbing resin particles which retain the intact water-absorbing performance and can attain both absorption rate and liquid permeation through swelled gel particles. The present invention is: water-absorbing resin particles which comprise a crosslinked polymer (A) of a monomer composition that comprises an internal crosslinking agent (b) and a water-soluble vinyl monomer (a1) and/or a vinyl monomer (a2) which becomes a water-soluble vinyl monomer (a1) upon hydrolysis, and which further include an inorganic acid (c) containing one or more protons and having a pKa of 4.5-10, and which have a water-soluble content of 20% or less; a process for producing the water-absorbing resin particles which includes a step in which the surface of resin particles (B) that comprise the crosslinked polymer (A) and the inorganic acid (c) and that have a water content of 3-8 wt% is crosslinked with a surface-crosslinking agent (d); and an absorbent object comprising the water-absorbing resin particles.

TOMIOKA MEGUMI (JP)
UEDA YUSUKE (JP)
TAKAHASHI KAZUHIRO (JP)

PCT/JP2017/018819

November 23, 2017

May 19, 2017

Click for automatic bibliography generation  

SDP GLOBAL CO LTD (JP)

C08J3/12; B01J20/26; B01J20/30; C08F20/06

WO2009005114A1	2009-01-08
WO2013002387A1	2013-01-03
WO2011040530A1	2011-04-07

JP2008535640A	2008-09-04
JPH03179008A	1991-08-05
JP2000230129A	2000-08-22
JP2012143755A	2012-08-02
JP2003052742A	2003-02-25
JPS6433158A	1989-02-03
JPH08508517A	1996-09-10
JPH02196806A	1990-08-03

FURUTANI Shinya (JP)

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