US 12,466,930 B2
Porous cellulose particles and method for producing same
Toru Shibata, Tokyo (JP); Hiromichi Okura, Tokyo (JP); and Yuki Hirabayashi, Tokyo (JP)
Assigned to DAICEL CORPORATION, Osaka (JP)
Appl. No. 17/631,506
Filed by Daicel Corporation, Osaka (JP)
PCT Filed Jul. 30, 2020, PCT No. PCT/JP2020/029221
§ 371(c)(1), (2) Date Jan. 31, 2022,
PCT Pub. No. WO2021/024900, PCT Pub. Date Feb. 11, 2021.
Claims priority of application No. 2019-142886 (JP), filed on Aug. 2, 2019.
Prior Publication US 2022/0275163 A1, Sep. 1, 2022
Int. Cl. C08J 9/28 (2006.01)
CPC C08J 9/28 (2013.01) [C08J 2301/02 (2013.01); C08J 2405/08 (2013.01)] 5 Claims
OG exemplary drawing
 
1. Porous cellulose particles comprising: unsubstituted cellulose and chitosan,
wherein a content of the chitosan is not less than 3 mass % and not greater than 8 mass % in a total of 100 mass % of the unsubstituted cellulose and the chitosan,
pores having a diameter from 0.05 to 5 μm are observed in an image of surfaces of the porous cellulose particles observed by a scanning electron microscope, and
a proportion of porous cellulose particles having a particle diameter from 10 to 200 μm is not less than 90 mass %.