US 12,221,496 B2
Fibrillated chemically modified cellulose fiber
Masato Takayama, Tokyo (JP); Sakiko Nakada, Tokyo (JP); Yuki Takahashi, Tokyo (JP); Shisei Goto, Tokyo (JP); and Hiroyoshi Suzuki, Tokyo (JP)
Assigned to NIPPON PAPER INDUSTRIES CO., LTD., Tokyo (JP)
Appl. No. 17/441,356
Filed by NIPPON PAPER INDUSTRIES CO., LTD., Tokyo (JP)
PCT Filed Mar. 5, 2020, PCT No. PCT/JP2020/009362
§ 371(c)(1), (2) Date Sep. 21, 2021,
PCT Pub. No. WO2020/195671, PCT Pub. Date Oct. 1, 2020.
Claims priority of application No. 2019-063449 (JP), filed on Mar. 28, 2019; application No. 2019-063472 (JP), filed on Mar. 28, 2019; and application No. 2019-219474 (JP), filed on Dec. 4, 2019.
Prior Publication US 2022/0153879 A1, May 19, 2022
Int. Cl. C08B 11/12 (2006.01)
CPC C08B 11/12 (2013.01) 14 Claims
 
1. A fibrillated chemically modified cellulose fiber, wherein a degree of crystallization of cellulose type I is 50% or more, an anionic charge density is 0.10 meq/g or more and 2.00 meq/g or less, and an average fiber diameter is 10 μm or more, and wherein a chemically modified cellulose in the fibrillated chemically modified cellulose is a carboxylated cellulose obtained by oxidizing a cellulose raw material with an N-oxyl compound, an oxidant, and a compound selected from the group consisting of bromide, iodide and a mixture thereof.