Water-absorbent resin and method for production thereof
US6107358A · kind A · utility
72Cited by
9References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1997 |
| Grant date | Aug 22, 2000 |
| Priority date | — |
| Expiry date | Aug 21, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F220/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for the production of a water-absorbent resin capable of fast water absorption is disclosed which comprises the steps of dispersing bubbles of an inert gas in an aqueous monomer solution of a mixture of a water-soluble unsaturated monomer and a water-soluble cross-linking monomer and subjecting the mixture to copolymerization under the condition that a volume of the monomer solution wherein the inert gas is dispersed is in the range of 1.02 to 5 times of a volume of non-dispersant state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.