US 12,466,898 B2
Fibrous cellulose, fibrous cellulose composite resin, and method for preparing fibrous cellulose
Takaaki Imai, Ehime (JP); and Yu Ochiai, Ehime (JP)
Assigned to Daio Paper Corporation, Ehime (JP)
Appl. No. 17/802,453
Filed by DAIO PAPER CORPORATION, Ehime (JP)
PCT Filed Mar. 2, 2021, PCT No. PCT/JP2021/007908
§ 371(c)(1), (2) Date Aug. 25, 2022,
PCT Pub. No. WO2021/182180, PCT Pub. Date Sep. 16, 2021.
Claims priority of application No. 2020-041491 (JP), filed on Mar. 11, 2020.
Prior Publication US 2023/0357449 A1, Nov. 9, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C08B 15/06 (2006.01); C08L 23/12 (2006.01)
CPC C08B 15/06 (2013.01) [C08L 23/12 (2013.01); C08L 2205/16 (2013.01)] 9 Claims
 
1. Fibrous cellulose having an average fiber width of not smaller than 0.1 μm, and having hydroxyl groups partially or fully substituted with carbamate groups,
wherein a ratio of substitution with the carbamate groups is 1.0 mmol/g or higher, and
wherein the fibrous cellulose has an average fiber length of longer than 0.10 mm, and wherein at least 20% of the fibrous cellulose has a fiber length of longer than 0.02 mm.