Gels and hydrogels
US9850379B2 · kind B2 · utility
3Cited by
2References
33Claims
0Family size
Inventors
Key dates
| Filing date | Nov 8, 2011 |
| Grant date | Dec 26, 2017 |
| Priority date | — |
| Expiry date | May 4, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/05
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Gels and gel-containing materials, including hydrogels, are described. A gel can be formed by blending polyacrylic acid (PAA) and a polyglycol, such as polytetramethylene ether glycol (PTMEG) at room temperature and, in some cases, without using a catalyst. The blend material can be used to form soft or hard materials, films and particles. The blend material can be combined with vinyl monomers and polymerize to form a hydrogel. The hydrogel can have a high mechanical strength and high water absorbency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.