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Title:
PRODUCTION METHOD FOR WATER-ABSORBING RESIN POWDER, AND DEVICE AND METHOD FOR DRYING PARTICULATE HYDROUS GEL
Document Type and Number:
WIPO Patent Application WO/2018/092863
Kind Code:
A1
Abstract:
This production method includes a drying step in which a granular dried substance is obtained by using a heating device to dry a particulate hydrous gel-like crosslinked polymer obtained by polymerizing a monomer which is a starting material of a water-absorbing resin. The heating device is provided with: a rotating container which accommodates the particulate hydrous gel-like polymer therein and rotates; and a plurality of heating pipes which are positioned inside the rotating container, extend in the axial direction of the rotating container, and rotate in conjunction with the rotating container. The gel temperature of the particulate hydrous gel-like crosslinked polymer provided in the drying step is 50˚C or higher as measured using a contact thermometer.

Inventors:
WATABE HIROYASU
SATO MAI
WAKABAYASHI RYOTA
SHOBO YOSHIHIRO
KATSUBE SHIN-YA
IMURA MOTOHIRO
HONDA KOJI
FUJINO SHIN-ICHI
ISHIZAKI KUNIHIKO
SHUTO TOKIO
Application Number:
PCT/JP2017/041371
Publication Date:
May 24, 2018
Filing Date:
November 16, 2017
Export Citation:
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Assignee:
NIPPON CATALYTIC CHEM IND (JP)
International Classes:
C08J3/12; C08J3/24
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Other References:
MODERN SUPERABSORBENTS POLYMER CHEMISTRY, 1998, pages 69 - 103
Attorney, Agent or Firm:
PATENT CORPORATE BODY ARCO PATENT OFFICE (JP)
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