Title:
METHOD FOR PRODUCING FIBROUS CELLULOSE, FIBROUS CELLULOSE LIQUID DISPERSION, AND SHEET
Document Type and Number:
WIPO Patent Application WO/2020/138157
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing microfibrous cellulose having a phosphite group, which can provide a microfibrous cellulose liquid dispersion having improved transparency. The present invention relates to a method for producing fibrous cellulose, comprising a step of mixing a cellulose raw material with a compound having a phosphite group and/or a salt thereof and urea and/or a urea derivative to produce a phosphitylated cellulose raw material and a step of subjecting the phosphitylated cellulose raw material to a pulverization treatment to produce fibrous cellulose having a fiber width of 1000 nm or less and having a phosphite group, wherein, in the step of producing the phosphitylated cellulose raw material, the decomposition rate of the urea and/or the urea derivative is 90% or less.
Inventors:
NOGUCHI YUICHI (JP)
ZHAO MENGCHEN (JP)
TODOROKI YUSUKE (JP)
ZHAO MENGCHEN (JP)
TODOROKI YUSUKE (JP)
Application Number:
PCT/JP2019/050804
Publication Date:
July 02, 2020
Filing Date:
December 25, 2019
Export Citation:
Assignee:
OJI HOLDINGS CORP (JP)
International Classes:
D01F2/00; C08B5/00
Domestic Patent References:
| WO2018159473A1 | 2018-09-07 | |||
| WO2014185505A1 | 2014-11-20 | |||
| WO2018159743A1 | 2018-09-07 | |||
| WO2017170908A1 | 2017-10-05 | |||
| WO2014185505A1 | 2014-11-20 | |||
| WO2018159473A1 | 2018-09-07 |
Foreign References:
| JP2017066273A | 2017-04-06 | |||
| JP2018009116A | 2018-01-18 | |||
| JP2013127141A | 2013-06-27 |
Other References:
SEAGAL ET AL., TEXTILE RESEARCH JOURNAL, vol. 29, 1959, pages 786
Attorney, Agent or Firm:
SIKS & CO. (JP)
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