Process for producing low-concentration gel using gel-precursor clusters, and gel obtained by said production process
US10550225B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 2016 |
| Grant date | Feb 4, 2020 |
| Priority date | — |
| Expiry date | May 30, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2471/02
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
[Problem] To provide a gel which can be produced in a short time, has controlled properties such as modulus and expansion pressure, and has a low polymer concentration. [Solution] A process for producing a polymer gel in which gel-precursor clusters have been crosslinked with one another to form a three-dimensional network structure, characterized by comprising a) a step in which monomer or polymer units that are present in a concentration less than a critical gelation concentration are crosslinked to form the gel-precursor clusters, the gel-precursor clusters having a storage modulus G′ and a loss modulus G″ which satisfy the relationship G′<G″, and b) a step in which the gel-precursor clusters are crosslinked with one another by a crosslinking agent to obtain a gel having a three-dimensional network structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.