Water-swellable material comprising coated water-swellable polymers
US7049000B2 · kind B2 · utility
23Cited by
29References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 5, 2004 |
| Grant date | May 23, 2006 |
| Priority date | — |
| Expiry date | Aug 5, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2998
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This invention relates to a water-swellable material comprising water-swellable polymers that are coated with a coating agent that comprises a phase-separating elastomeric material, which allows swelling of the water-swellable polymers, without breakage of the coating. The invention also relates to a process of making specific coated water-swellable polymers using a phase-separating elastomeric material, and materials obtainable by such a process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.