Method of preparing superabsorbent polymer
US11958037B2 · kind B2 · utility
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Key dates
| Filing date | Dec 12, 2019 |
| Grant date | Apr 16, 2024 |
| Priority date | — |
| Expiry date | Apr 10, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2207/53
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of preparing a superabsorbent polymer having a rapid absorption rate and an improved water retention capacity by additional heat treatment while using a thermally degradable internal crosslinking agent and an encapsulated foaming agent at the same time during polymerization.A superabsorbent polymer prepared by this method is also provided, the superabsorbent polymer having a centrifuge retention capacity (CRC) of 40 g/g to 55 g/g, as measured according to EDANA method WSP 241.3, and an absorption rate of 48 sec or less, as measured by a vortex method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.