Superabsorbent polymers having radiation activatable surface cross-linkers and method of making them
US7166356B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 4, 2004 |
| Grant date | Jan 23, 2007 |
| Priority date | — |
| Expiry date | Oct 27, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2998
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
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 a water-absorbing resin and the reaction product of a radiation activatable surface cross-linker wherein the reaction product of the radiation activatable surface cross-linker is present at surfaces of the superabsorbent polymer particles. The radiation activatable surface cross-linker comprises at least two radiation activatable groups R, which are covalently bound to each other or to at least one spacer group S.Moreover, the invention relates to a process for making these superabsorbent polymer particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.