Process for granulating a water-absorbent resin employing (a) water (b) inorganic powder & (c) surfactant in an inert solvent
US4732968A · kind A · utility
31Cited by
11References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1986 |
| Grant date | Mar 22, 1988 |
| Priority date | — |
| Expiry date | Dec 3, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2300/14
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A water-absorbent resin having an appropriate particle size and a narrow particle size distribution can be obtained by adding a powdered inorganic material in a proportion of 0.000005-0.2 part by weight to 1 part by weight of a water-absorbent resin containing therein a carboxylate as a component of the polymer with agitation in an inert solvent in the presence of 0.1-5.0 parts by weight of water and 0.005-0.2 part by weight of a surfactant and then removing water and the inert solvent by distillation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.