Title:
CELLULOSE MICROFIBERS AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2019/221256
Kind Code:
A1
Abstract:
[Problem] To provide: cellulose microfibers that, if the cellulose microfibers are put into a dispersion, will give the dispersion extremely high transmittance and viscosity; and a method for manufacturing the cellulose microfibers. [Solution] Cellulose microfibers have a fiber width of 1–200 nm, an ester of a phosphorous oxoacid is introduced by replacing some hydroxy groups of the cellulose fibers with prescribed functional groups, and the quantity of the functional groups introduced is greater than 2.0 mmol per 1 g of the cellulose fibers. Moreover, when these cellulose microfibers are manufactured, a solution with a pH below 3.0, comprising an additive (A) that includes a phosphorous oxoacid and/or a metal salt of a phosphorous oxoacid and an additive (B) that includes urea and/or a urea derivative, is added to the cellulose fibers and then the result is heated and fibrillated.
Inventors:
MATSUSUE IKKO (JP)
Application Number:
PCT/JP2019/019606
Publication Date:
November 21, 2019
Filing Date:
May 17, 2019
Export Citation:
Assignee:
DAIO SEISHI KK (JP)
International Classes:
C08B5/00; D21H11/18
Domestic Patent References:
| WO2017170908A1 | 2017-10-05 | |||
| WO2016002689A1 | 2016-01-07 |
Foreign References:
| US20110196139A1 | 2011-08-11 | |||
| JPS4610551B1 | 1971-03-17 | |||
| JP2018193465A | 2018-12-06 | |||
| JP2018141249A | 2018-09-13 | |||
| JP2018193440A | 2018-12-06 | |||
| JP6404415B1 | 2018-10-10 | |||
| JP6540925B1 | 2019-07-10 | |||
| JP2010216021A | 2010-09-30 | |||
| JP2009293167A | 2009-12-17 | |||
| JP2013127141A | 2013-06-27 |
Other References:
See also references of EP 3795596A4
Attorney, Agent or Firm:
NAGAI INTERNATIONAL PATENT BUREAU (JP)
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