Title:
SULFONATED CELLULOSE MICROFIBERS AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2021/049571
Kind Code:
A1
Abstract:
[Problem] To provide: sulfonated cellulose microfibers having excellent viscous properties and the like; and a method for producing sulfonated cellulose microfibers, said method being capable of efficiently producing the above-described sulfonated cellulose microfibers. [Solution] Cellulose microfibers obtained by miniaturizing cellulose fibers, wherein: some hydroxyl groups in the cellulose microfibers are substituted by sulfo groups; the amount of sulfur introduced by the sulfo groups is higher than 0.42 mmol/g; each microfiber is composed of a plurality of unit fibers, while having an average fiber width of 30 nm or less; and the viscosity of a dispersion liquid, which is obtained by dispersing the cellulose microfibers into an aqueous solvent so that the solid content concentration thereof is 0.5% by mass, is 5,000 mPa∙s or more at 25°C. Consequently, desired viscous properties are able to be achieved if the cellulose microfibers are dispersed in a dispersion liquid.
Inventors:
HIASA SHOU (JP)
NISHIYAMA SEIJI (JP)
NISHIYAMA SEIJI (JP)
Application Number:
PCT/JP2020/034293
Publication Date:
March 18, 2021
Filing Date:
September 10, 2020
Export Citation:
Assignee:
MARUSUMI PAPER CO LTD (JP)
International Classes:
A61K8/73; A61Q1/00; C08B5/14; D06M13/256; D21H11/20; D06M101/06
Domestic Patent References:
| WO2019208656A1 | 2019-10-31 | |||
| WO2019073810A1 | 2019-04-18 | |||
| WO2019003774A1 | 2019-01-03 | |||
| WO2017170908A1 | 2017-10-05 |
Foreign References:
| JP2020124680A | 2020-08-20 | |||
| JP2020097812A | 2020-06-25 | |||
| JP2020097733A | 2020-06-25 | |||
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| JP2019011411A | 2019-01-24 |
Other References:
INDUSTRIAL AND ENGINEERING CHEMISTRY, vol. 42, no. 3, 1950, pages 502 - 507
Attorney, Agent or Firm:
NAKAI, Hiroshi et al. (JP)
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