Aqueous dispersion of hydrosoluble or hydroswellable polymer
US11702513B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Sep 17, 2020 |
| Grant date | Jul 18, 2023 |
| Priority date | — |
| Expiry date | Sep 15, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K2003/322
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention concerns an aqueous dispersion comprising particles of water-soluble polymer of average molecular weight higher than or equal to 0.5 million daltons, or of water-swellable polymer, and a mixture of at least one sulfate salt and at least one phosphate salt in weight proportions of between 25:75 and 75:25.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.