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公开(公告)号：US20250049645A1
公开(公告)日：2025-02-13
申请号：US18290466
申请日：2022-04-25
Applicant: DAICEL CORPORATION
Inventor： Keiko KOBAYASHI , Sadaki TAKATA , Masaya OMURA
Abstract: A composition includes particles of a cellulose derivative and a surface treatment compound. The particles of the cellulose derivative have an average particle size from 0.08 μm to 100 μm. The surface treatment compound is an organic compound having a long-chain alkyl group and/or an inorganic powder. The inorganic powder has an average particle size of ⅓ or less of the average particle size of the particles of the cellulose derivative. A cosmetic composition includes the composition. A method for producing the composition includes mixing the particles of the cellulose derivative and the surface treatment compound. In the mixing, the particles of the cellulose derivative and the surface treatment compound are dry-mixed.
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公开(公告)号：US20240261207A1
公开(公告)日：2024-08-08
申请号：US18564333
申请日：2022-04-25
Applicant: DAICEL CORPORATION
Inventor： Keiko KOBAYASHI , Sadaki TAKATA , Masaya OMURA
CPC classification number: A61K8/731 , A61Q19/00 , A61K2800/10 , A61K2800/622 , A61K2800/654
Abstract: Composite particles include particles of a cellulose derivative and a film covering a surface of the particles of the cellulose derivative. The film is formed of a surface treatment compound that dissolves in water and/or an organic solvent. A cosmetic composition contains the composite particles. A method for producing the composite particles includes mixing particles of a cellulose derivative and a surface treatment compound, wherein the particles of the cellulose derivative and the surface treatment compound are stirred and mixed in a solvent that dissolves the surface treatment compound; and drying a solid content containing the particles of the cellulose derivative, wherein the solid content is washed and dried. A preferable solvent is water or an alcohol.
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