Title:
TYPE II UNMODIFIED CELLULOSE MICROFIBERS, AND METHOD FOR MANUFACTURING TYPE II UNMODIFIED CELLULOSE MICROFIBERS AND COMPACT OF SAME
Document Type and Number:
WIPO Patent Application WO/2023/017687
Kind Code:
A1
Abstract:
[Problem] To provide a manufacturing method for obtaining type II unmodified cellulose microfibers through mercerization of cellulose, wherein chemically unmodified cellulose microfibers can be obtained efficiently through simple steps. [Solution] This method for manufacturing type II unmodified cellulose microfibers is characterized by comprising: a fibrillation step in which an alkali metal hydroxide is added to raw material cellulose and then the result is fibrillated to obtain cellulose microfibers, the raw material cellulose having passed through a mercerization step in which cellulose is mercerized to obtain mercerized cellulose and a depolymerization step in which the degree of polymerization of the mercerized cellulose is reduced to 760 or less, so as to bring the total concentration to 2.5–17.5%; and a neutralization step in which the cellulose microfibers are neutralized with an acid.
Inventors:
IWATA IPPEI (JP)
YAMAZAKI ASUKA (JP)
YAMAZAKI ASUKA (JP)
Application Number:
PCT/JP2022/025744
Publication Date:
February 16, 2023
Filing Date:
June 28, 2022
Export Citation:
Assignee:
FUTAMURA KAGAKU KK (JP)
International Classes:
D21H11/18; C08B1/00; A61K8/73
Domestic Patent References:
| WO2019111933A1 | 2019-06-13 |
Foreign References:
| JP2004536155A | 2004-12-02 | |||
| JP2015157796A | 2015-09-03 | |||
| JP2008001728A | 2008-01-10 | |||
| JP2019099758A | 2019-06-24 |
Attorney, Agent or Firm:
KATO Hiroki et al. (JP)
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