公开(公告)号：US20230301897A1

公开(公告)日：2023-09-28

申请号：US18010591

申请日：2021-07-08

Applicant: DAICEL CORPORATION

Inventor： Keiko KOBAYASHI ,  Masaya OMURA ,  Takuya HISAZUMI ,  Hidetaka HAYAMIZU ,  Jumpei IIO

IPC: A61K8/73 ,  A61K8/02 ,  A61Q19/00

CPC classification number: A61K8/731 ,  A61K8/025 ,  A61Q19/00 ,  A61K2800/412 ,  A61K2800/654 ,  A61K2800/10

Abstract: Provided are cellulose acetate particles. The cellulose acetate particles have an average particle size of 80 nm or greater and 100 μm or less, a sphericity of 0.7 or greater and 1.0 or less, and a relative specific surface area of 3.0 or greater and 20 or less. A total degree of acetyl substitution of the cellulose acetate is 0.7 or greater and 3.0 or less.