Title:
METHOD FOR PRODUCING WATER-ABSORBING RESIN PARTICLES
Document Type and Number:
WIPO Patent Application WO/2022/075256
Kind Code:
A1
Abstract:
This method for producing water-absorbing resin particles, which contain granulated particles, comprises: forming a first mass by agglomerating a polymer fine powder, which passes through a sieve having a 180μm mesh, by mixing the same with water; drying the first mass and forming a granulated fine powder that passes through a sieve having a 180μm mesh; forming a second mass by agglomerating particle groups, which contain the granulated fine powder, by mixing the same with water; and forming granulated particles by drying and granulating the second mass. The content ratio of the granulated fine powder in the particle groups is 80-100mass% with respect to the total particle groups.
Inventors:
AWAJI NAOYA (JP)
Application Number:
PCT/JP2021/036615
Publication Date:
April 14, 2022
Filing Date:
October 04, 2021
Export Citation:
Assignee:
SUMITOMO SEIKA CHEMICALS (JP)
International Classes:
C08J3/12; B01J20/30
Domestic Patent References:
| WO2019221235A1 | 2019-11-21 |
Foreign References:
| JP2020520390A | 2020-07-09 | |||
| JPH11106514A | 1999-04-20 | |||
| JPH11140194A | 1999-05-25 | |||
| JP2005015787A | 2005-01-20 | |||
| JP2004067878A | 2004-03-04 | |||
| JP2013034942A | 2013-02-21 |
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
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