The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 06, 2022
Filed:
Dec. 05, 2018
Applicant:
Nippon Paper Industries Co., Ltd., Tokyo, JP;
Inventors:
Assignee:
NIPPON PAPER INDUSTRIES CO., LTD., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08B 11/12 (2006.01); C08B 11/20 (2006.01); D01F 2/28 (2006.01); B82Y 30/00 (2011.01); B82Y 40/00 (2011.01);
U.S. Cl.
CPC ...
C08B 11/12 (2013.01); C08B 11/20 (2013.01); D01F 2/28 (2013.01); B82Y 30/00 (2013.01); B82Y 40/00 (2013.01);
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.