Water absorbing polymers
US4690971A · kind A · utility
24Cited by
2References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 3, 1986 |
| Grant date | Sep 1, 1987 |
| Priority date | — |
| Expiry date | Mar 3, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F11/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A slurry or cake is converted to a crumbly state by admixture, in the absence of a polymeric binder, with water swellable, cross-linked, non-sticky, wholly synthetic polymer particles formed of a polymer of acrylic acid (as free acid or water soluble salt) with cross-linking agent and, optionally, acrylamide and/or other monomers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.