Method for reducing residual acrylic acid in acrylic acid polymer gels
US4766173A · kind A · utility
49Cited by
5References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 11, 1987 |
| Grant date | Aug 23, 1988 |
| Priority date | — |
| Expiry date | May 11, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S524/916
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for reducing the residual acrylic acid present in water-insoluble polyacrylic acid water absorbent gel polymers which comprises treating these polymers with at least 0.5 mole of either amino acid cysteine or lysine per mole of acrylic acid present in said waters for at least 15 minutes at a temperature of at least 80.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.