Title:
WATER-ABSORBING RESIN COMPOSITION, ABSORBENT, AND ABSORPTIVE ARTICLE
Document Type and Number:
WIPO Patent Application WO/2022/019219
Kind Code:
A1
Abstract:
Provided is a water-absorbing resin composition that is capable of achieving both high liquid diffusion and liquid leakage prevention in an absorbent. The present invention provides a water-absorbing resin composition, wherein: an electromotive force P(mV) of a first-washing washing liquid, obtained as a result of washing the water-absorbing resin composition by means of the washing method indicated below, is equal to or greater than 80 V; and the difference (P-Q) between the electromotive force P(mV) and an electromotive force Q(mV) of a second-washing washing liquid, obtained as a result of washing the water-absorbing resin composition by means of the washing method indicated below, is equal to or greater than 10 mV. (Washing method) A container in which a sieve having a mesh size of 36 µm is attached to the bottom of a cylinder having an inner diameter of 60 mm is prepared. 1 g of the water-absorbing resin composition is evenly dispersed on the sieve in the container. A 200 mL beaker is placed under the sieve. 200 g of a physiological saline solution is rapidly introduced from above the water-absorbing resin composition and the physiological saline solution that has flowed down into the beaker is used as the first-washing washing liquid. Next, a new 200 mL beaker is placed under the sieve. An additional 200 g of the physiological saline solution is rapidly introduced from above the water-absorbing resin composition and the physiological saline solution that has flowed down into the beaker is used as the second-washing washing liquid.
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Inventors:
YAMAMOTO TOMOE (JP)
Application Number:
PCT/JP2021/026700
Publication Date:
January 27, 2022
Filing Date:
July 15, 2021
Export Citation:
Assignee:
SUMITOMO SEIKA CHEMICALS (JP)
International Classes:
C08F20/06; A61F13/53; B01J20/26; B01J20/28
Domestic Patent References:
| WO2014054656A1 | 2014-04-10 |
Foreign References:
| JP2005186016A | 2005-07-14 | |||
| JP2017110091A | 2017-06-22 | |||
| JPH03227301A | 1991-10-08 |
Attorney, Agent or Firm:
TANAKA, Junya et al. (JP)
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