Irradiation or thermal treatment of water-impregnated cross-linked poly-acrylic acid metal salt resin particles
US5244934A · kind A · utility
22Cited by
8References
10Claims
0Family size
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Key dates
| Filing date | Dec 2, 1991 |
| Grant date | Sep 14, 1993 |
| Priority date | — |
| Expiry date | Dec 2, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2333/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process of producing a water absorptive resin, wherein a water absorptive polymer which comprises cross-linked poly(metal salt of acrylic acid) as a major component is impregnated with water, and the water-impregnated water absorptive polymer is exposed to one of a high-temperature highly-humid atmosphere or a ultraviolet radiation, to thereby partially release the cross-linkage of the cross-linked poly(metal salt of acrylic acid).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.