Process for producing a superabsorbent polymer
US5075344A · kind A · utility
25Cited by
1References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 20, 1991 |
| Grant date | Dec 24, 1991 |
| Priority date | — |
| Expiry date | May 20, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/915
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention provides an improved process for producing a superabsorbent polymer with reduced residual monomer content which comprises partially drying a crosslinked, partially neutralized polymer gel, then raising the temperature of the gel using microwaves or RF radiation in the absence of circulating air and thereafter completing the drying.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.