Composition for forming hydrogel, hydrogel, and method for producing composition for forming hydrogel
US12312430B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 2020 |
| Grant date | May 27, 2025 |
| Priority date | — |
| Expiry date | Dec 15, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2329/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Provided is a hydrogel-forming composition capable of forming a sterilized hydrogel having a high mechanical strength. Also provided are a hydrogel using the hydrogel-forming composition, and a method for producing the hydrogel-forming composition. The hydrogel-forming composition contains a vinyl alcohol polymer having an ethylenically unsaturated group and having a polymerization degree of 450 or more, in which the ethylenically unsaturated group introduction ratio is 0.01 to 10 mol % in all the structural units constituting the vinyl alcohol polymer, and in which no microorganisms detectable by the sterility test method (direct method) specified in the general test methods of the Japanese Pharmacopoeia are present.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.