Method for making aggregates or clusters of water-swellable polymers having increased hydration rate over unassociated water-swellable polymers
US5374684A · kind A · utility
10Cited by
6References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 1, 1993 |
| Grant date | Dec 20, 1994 |
| Priority date | — |
| Expiry date | Sep 1, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/62
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Clusters of water-swellable polymer particles, having high rates of absorbency without gel-blocking are prepared by suspending water-swellable polymer particles in an inert hydrophobic liquid, such as hydrocarbon, and slowly adding to the particles a suspension of an aqueous solution optionally containing an .alpha.,.beta.-ethylenically unsaturated monomer in an inert hydrophobic liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.