Title:
METHOD FOR PRODUCING WATER-ABSORBING RESIN COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2024/009541
Kind Code:
A1
Abstract:
The present invention is a method for producing a water-absorbing resin composition which involves a polymerization step for obtaining a water-containing gel which contains a cross-linked polymer (A), and a drying step for drying the water-containing gel in a dryer, said method being characterized in that: the dryer is a rotary dryer for performing a drying treatment inside a tumbling barrel, and has a tumbling barrel capable of rotating around an axis, and a stirring shaft which is capable of rotating, has a stirring rod, and is arranged in the axial direction; and the water-containing gel is lifted while being dried inside the tumbling barrel of the rotary dryer by rotating the tumbling barrel and stirring rod during the drying step. The present invention makes it possible to provide a method for producing a water-absorbing resin composition which makes it possible to contribute to a reduction in environmental burden by reducing the time which the drying step takes, and also to reduce the occurrence of discolored foreign matter and performance degradation caused by the drying step.
Inventors:
MATSUSHITA YOSHITSUGU (JP)
Application Number:
PCT/JP2023/001939
Publication Date:
January 11, 2024
Filing Date:
January 23, 2023
Export Citation:
Assignee:
SDP GLOBAL CO LTD (JP)
International Classes:
C08J3/12; F26B17/32; F26B21/08; F26B25/04
Domestic Patent References:
| WO2018092864A1 | 2018-05-24 | |||
| WO2017221911A1 | 2017-12-28 | |||
| WO2019221154A1 | 2019-11-21 | |||
| WO2019221236A1 | 2019-11-21 | |||
| WO2018092863A1 | 2018-05-24 |
Foreign References:
| JPH11292919A | 1999-10-26 | |||
| JPS5027158A | 1975-03-20 | |||
| JPS63108093U | 1988-07-12 | |||
| JP2007162376A | 2007-06-28 |
Attorney, Agent or Firm:
UNIUS PATENT ATTORNEYS OFFICE (JP)
Download PDF: