Superabsorbent polymers
US4921904A · kind A · utility
18Cited by
8References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1988 |
| Grant date | May 1, 1990 |
| Priority date | — |
| Expiry date | Dec 19, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2810/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A substantially water-insoluble, slightly cross-linked, partially neutralized, hydrogen-forming polymer composition consisting essentially of PA0 (a) from about 50 mole percent to 99.999 mole percent of polymerizable acid group-containing monomers, and PA0 (b) from about 0.001 mole percent to 10 mole percent of a water-soluble polyamine; said hydrogel-forming polymer composition having been formed by reacting a water-soluble acid group-containing vinyl polymer with a water-soluble polyamine at a temperature sufficient to convert the substantial portion of the amino groups of the water-soluble polyamine into amido groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.