Process for producing water-absorbing resin
US9233186B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Mar 14, 2011 |
| Grant date | Jan 12, 2016 |
| Priority date | — |
| Expiry date | Jul 5, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2333/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The disclosed process for producing a water-absorbing resin comprising: a polymerization step of polymerizing an aqueous unsaturated monomer; a drying step of drying a particulated water-containing gel-liked crosslinked polymer, obtained in a finely crushing step during the polymerization or after the polymerization; a pulverizing step after the drying, a classification step after the drying, and a surface treatment step after the classification. In the process is, the surface-treatment step is interrupted with a heating treatment apparatus kept in a heated state and thereafter the surface treatment step is restarted.
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