US 12,460,054 B2
Cellulosic particle
Kenji Yao, Kanagawa (JP); Kazusei Yoshida, Kanagawa (JP); Ayu Naito, Kanagawa (JP); Shota Matoba, Kanagawa (JP); Satomi Kashiwagi, Kanagawa (JP); Yuko Iwadate, Kanagawa (JP); Masahiro Oki, Kanagawa (JP); Takahiro Ishizuka, Kanagawa (JP); Takeshi Iwanaga, Kanagawa (JP); Hideaki Yoshikawa, Kanagawa (JP); Tetsuya Taguchi, Kanagawa (JP); and Hirokazu Hamano, Kanagawa (JP)
Assigned to FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed by FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed on Aug. 7, 2023, as Appl. No. 18/366,674.
Claims priority of application No. 2023-015492 (JP), filed on Feb. 3, 2023.
Prior Publication US 2024/0262967 A1, Aug. 8, 2024
Int. Cl. C08J 3/12 (2006.01); C08J 7/04 (2020.01); C08K 3/22 (2006.01); C08K 3/26 (2006.01); C08K 5/098 (2006.01); C08K 5/17 (2006.01); C08L 1/02 (2006.01); C08L 1/10 (2006.01)
CPC C08J 3/128 (2013.01) [C08J 7/04 (2013.01); C08K 3/22 (2013.01); C08K 3/26 (2013.01); C08K 5/098 (2013.01); C08K 5/175 (2013.01); C08L 1/02 (2013.01); C08L 1/10 (2013.01); C08K 2003/265 (2013.01)] 12 Claims
 
1. A cellulosic particle comprising:
a core particle containing cellulose as a base constituent;
a coating layer covering the core particle and containing at least one selected from the group consisting of a fatty acid and a fatty acid metallic salt; and
an intermediate layer between the core particle and the coating layer, wherein
the fatty acid is a saturated fatty acid,
the fatty acid metallic salt is a saturated fatty acid metallic salt,
the intermediate layer is at least one selected from the group consisting of a polyamine compound, a polyquaternium, a polysaccharide compound, and a polyacrylic acid, and
an intensity of sodium fluorescent x-rays measured by x-ray fluorescence analysis is 0.015 kps or more and 0.1 kps or less.