Method for producing carboxymethylated cellulose and carboxymethylated cellulose nanofibers
US11518820B2 · kind B2 · utility
1Cited by
5References
18Claims
0Family size
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Key dates
| Filing date | Dec 5, 2018 |
| Grant date | Dec 6, 2022 |
| Priority date | — |
| Expiry date | Jan 5, 2039 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06M2101/08
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention provides a novel method for producing carboxymethylated cellulose, the method making it possible to economically obtain a high-transparency cellulose nanofiber dispersion. In the carboxymethylation of cellulose, mercerization is carried out in a solvent comprising mainly water, and then carboxymethylation is carried out in a mixed solvent of water and an organic solvent. A nanofiber dispersion of high-transparency carboxymethylated cellulose can be obtained by defibrating the resulting carboxymethylated cellulose.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.