Microfibrillated cellulose as a crosslinking agent
US11820920B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 2018 |
| Grant date | Nov 21, 2023 |
| Priority date | — |
| Expiry date | Jun 7, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2401/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a composition for use as an adhesive, paint, coating, resin, (surface) size, composite, gel or hydrogel, said composition comprising microfibrillated cellulose (“MFC”). In addition to microfibrillated cellulose, these compositions comprise at least one solvent, said solvent preferably comprising or consisting of water, and at least one compound that is (a) capable of polymerizing, or has already partly or fully, polymerized, and that (b) has at least two groups available for hydrogen bonding, preferably OH groups, that are capable of crosslinking with at least one functional group of the microfibrillated cellulose. In these compositions, the microfibrillated cellulose primarily functions as a crosslinking agent (while it is by no means excluded that the microfibrillated cellulose additionally has other functionalities, such as acting as viscosity modifier and/or thixotropic additive), integrating the compound that (a) is capable of polymerizing or that has already partly or fully, polymerized, and that (b) has at least two groups available for hydrogen bonding, into a gel-like three-dimensional network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.