Production of hydrogels
US4367323A · kind A · utility
82Cited by
8References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1981 |
| Grant date | Jan 4, 1983 |
| Priority date | — |
| Expiry date | Dec 2, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K17/22
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention is to provide the methods for producing highly water-absorbable and water-retainable hydrogels having a large particle diameter together with a sufficient gel strength. The method is characterized by use of a specific dispersing agent in the water-in-oil type inverse phase suspension polymerization of an .alpha.,.beta.-unsaturated carboxylic acid and/or its alkali metal salt. Due to the high water-absorbability and water-retainability, along with the superior gel strength and the stable gel structure, the hydrogels of the invention enlarge the conventional range of usages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.