US 12,123,109 B2
Carboxymethylated cellulose nanofibers
Kazuhiko Inoue, Tokyo (JP); Takeshi Nakatani, Tokyo (JP); and Yusuke Tada, Tokyo (JP)
Assigned to NIPPON PAPER INDUSTRIES CO., LTD., Tokyo (JP)
Appl. No. 16/769,666
Filed by NIPPON PAPER INDUSTRIES CO., LTD., Tokyo (JP)
PCT Filed Dec. 5, 2018, PCT No. PCT/JP2018/044697
§ 371(c)(1), (2) Date Jun. 4, 2020,
PCT Pub. No. WO2019/111939, PCT Pub. Date Jun. 13, 2019.
Claims priority of application No. JP2017-235016 (JP), filed on Dec. 7, 2017; application No. JP2018-007508 (JP), filed on Jan. 19, 2018; and application No. JP2018-076540 (JP), filed on Apr. 12, 2018.
Prior Publication US 2021/0180214 A1, Jun. 17, 2021
Int. Cl. D01F 2/28 (2006.01)
CPC D01F 2/28 (2013.01) [D10B 2201/30 (2013.01)] 10 Claims
 
1. A carboxymethylated cellulose nanofiber having a degree of carboxymethyl substitution of more than 0.30 and 0.60 or less, a degree of crystallization of cellulose I type of 60% or more, an average fiber diameter of 3 nm to 500 nm, and an aspect ratio of 500 or less, and wherein when the carboxymethylated cellulose nanofiber is dispersed in water to form a water dispersion having a solid content of 1% (w/v), the water dispersion has a transmittance to light at 660 nm of 70% or more.