Method for producing improved water-absorbent resins
US4587308A · kind A · utility
151Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 4, 1985 |
| Grant date | May 6, 1986 |
| Priority date | — |
| Expiry date | Feb 4, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2300/14
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for easily, inexpensively and efficiently producing an improved water-absorbent resin having a high water absorbency and a high water absorption rate and capable of forming a gel having a high gel strength and nonstickiness, in which water-absorbent resin particles which contain water and a crosslinking agent and are in the semi-swollen state are agitated at an elevated temperature in the presence of an inert inorganic powder to conduct the crosslinking of the resin, while removing water, the water-absorbent resin containing a monomer units having a carboxyl group in the form of free acid or a metal salt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.