Surface cross-linked superabsorbent polymer particles and methods of making them
US7588777B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 2005 |
| Grant date | Sep 15, 2009 |
| Priority date | — |
| Expiry date | Oct 29, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2333/02
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention relates to superabsorbent polymer particles with improved surface cross-linking and their use in absorbent articles.The superabsorbent polymer particles of the present invention comprise polymer chain segments, wherein at least a part of the polymer chain segments are covalently cross-linked to each other and wherein at least a part of the cross-links comprise the reaction product of cross-linking molecules having at least two C═C double bonds and further comprise the reaction product of radical former molecules. These cross-links are present at surfaces of the superabsorbent polymer particles.Moreover, the invention relates a method for making these superabsorbent polymer particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.