公开(公告)号：US20220227891A1

公开(公告)日：2022-07-21

申请号：US17612651

申请日：2020-06-24

Applicant: DAICEL CORPORATION

Inventor： Shuuji YOSHIOKA ,  Toshikazu NAKAMURA ,  Shu SHIMAMOTO ,  Takao KISHIMOTO

IPC: C08B3/06 ,  C08B3/28 ,  C08B3/24 ,  A61K31/717 ,  A61P3/04 ,  A61P3/06

Abstract: The present invention is to provide a cellulose acetate that has a low total degree of acetyl substitution and a degree of acetyl substitution at 6-position that is lower compared to the degrees of acetyl substitution at 2-position and 3-position of a glucose ring, and has excellent water solubility. A cellulose acetate having: a total degree of acetyl substitution of 0.4 or greater and 0.9 or less, a proportion of a degree of acetyl substitution at 6-position in the total degree of acetyl substitution of 0% or greater and 18% or less, and a light transmittance at 660 nm of 5% or greater in 4 wt. % aqueous solution.