Process for producing water-absorbing resin
US9272068B2 · kind B2 · utility
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71References
16Claims
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Key dates
| Filing date | Mar 14, 2011 |
| Grant date | Mar 1, 2016 |
| Priority date | — |
| Expiry date | Oct 11, 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; and 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. In the process, the drying step is interrupted with a dryer kept in a heated state and thereafter the drying step is restarted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.