Process for the production of highly water-absorbing but less water-soluble hydrogels
US4351922A · kind A · utility
47Cited by
14References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1980 |
| Grant date | Sep 28, 1982 |
| Priority date | — |
| Expiry date | Aug 19, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/93
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A highly water-absorbing but less water-soluble hydrogel is produced by polymerizing at least one hydrophilic ethylenically unsaturated monomer, e.g., ethylenically unsaturated carboxylic acid, ethylenically unsaturated sulfonic acid, or derivatives thereof, in the presence of a specific difunctional compound, e.g., polyethyleneglycol diglycidyl ether, polyethyleneglycol diacrylate, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.