Crosslinked polyamine coating on superabsorbent hydrogels
US7396584B2 · kind B2 · utility
24Cited by
22References
43Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2002 |
| Grant date | Jul 8, 2008 |
| Priority date | — |
| Expiry date | Feb 19, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2998
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention concerns superabsorbent particles with a shell, wherein said shell comprises a cationic polymer crosslinked by the addition of crosslinker and adhered to hydrogel-forming polymer obtainable by applying a coating solution, containing both a cationic polymer and crosslinker, to hydrogel-forming polymer having a residual water content of less than 10 w %, their production and use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.