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

IPC: A61K8/02 ,  A61K8/19 ,  A61K8/27 ,  A61K8/73 ,  A61Q19/00

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.

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

IPC: A61K8/73 ,  A61Q19/00

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.

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.

公开(公告)号：US20220142900A1

公开(公告)日：2022-05-12

申请号：US17435128

申请日：2019-03-18

Applicant: DAICEL CORPORATION

Inventor： Keiko KOBAYASHI ,  Masaya OMURA

IPC: A61K8/73 ,  A61K8/02 ,  A61Q19/00 ,  A61K8/37

Abstract: An object is to provide particles excellent in biodegradability, tactile sensation, and lipophilicity.
Provided are particles containing cellulose acetate, in which the particles have an average particle size of not less than 80 nm and not greater than 100 μm, a sphericity of not less than 0.7 and not greater than 1.0, a degree of surface smoothness of not less than 80% and not greater than 100%, and a surface contact angle with water of not less than 100°; and a total degree of acetyl substitution of the cellulose acetate is not less than 0.7 and not greater than 2.9.

公开(公告)号：US20250043093A1

公开(公告)日：2025-02-06

申请号：US18718131

申请日：2022-11-09

Applicant: DAICEL CORPORATION

Inventor： Keiko KOBAYASHI ,  Yuta SAKAMOTO

IPC: C08J9/28 ,  A61K8/02 ,  A61Q1/06 ,  A61Q1/10 ,  A61Q1/12 ,  A61Q17/04 ,  C08K5/00

Abstract: Porous particles contain a biodegradable polymer as a main component. The biodegradable polymer is an aliphatic polyester and/or a polysaccharide ester having a total degree of substitution of 0.7 or more and 3.0 or less. The porous particles have an average particle size of 0.08 μm or more and 100 μm or less, a sphericity of 0.7 or more and 1.0 or less, and a relative specific surface area of more than 3.0 and 20 or less. A cosmetic composition contains the porous particles.

公开(公告)号：US20240228741A9

公开(公告)日：2024-07-11

申请号：US18277826

申请日：2022-02-15

Applicant: DAICEL CORPORATION

Inventor： Masaya OMURA ,  Keiko KOBAYASHI ,  Junko MAKINO

IPC: C08K3/22 ,  A61K8/19 ,  A61K8/73 ,  A61Q19/00 ,  C08K5/11

CPC classification number: C08K3/22 ,  A61K8/19 ,  A61K8/731 ,  A61Q19/00 ,  C08K5/11 ,  C08K2003/2206 ,  C08K2201/005

Abstract: Provided is a cellulose acylate composition containing cellulose acylate particles and metal compound-containing particles. The total degree of substitution of the cellulose acylate is from 0.7 to 2.9. The metal compound is one or more types of compounds selected from an alkali metal compound and an alkaline earth metal compound. The composition is produced by adding one or more types of metal compounds selected from an alkali metal compound and an alkaline earth metal compound during and/or after removing a water-soluble polymer from a dispersion containing, as a dispersoid, cellulose acylate impregnated with a plasticizer to form cellulose acylate particles.

公开(公告)号：US20200299488A1

公开(公告)日：2020-09-24

申请号：US16818619

申请日：2020-03-13

Applicant: DAICEL CORPORATION

Inventor： Keiko KOBAYASHI ,  Masaya OMURA

IPC: C08L1/02 ,  A61K8/73 ,  C08B1/00 ,  C08J3/16

Abstract: Cellulose derivative particles including an alkoxy group having 2 or more carbons or an acyl group having 3 or more carbons, wherein the cellulose derivative particles have an average particle size of 80 nm or greater and 100 μm or less, a sphericity of 70% or greater and 100% or less, and a surface smoothness of 80% or greater and 100% or less; and a total substitution degree of the cellulose derivative is 0.7 or greater and 3 or less.

公开(公告)号：US20240132696A1

公开(公告)日：2024-04-25

申请号：US18277826

申请日：2022-02-15

Applicant: DAICEL CORPORATION

Inventor： Masaya OMURA ,  Keiko KOBAYASHI ,  Junko MAKINO

IPC: C08K3/22 ,  A61K8/19 ,  A61K8/73 ,  A61Q19/00 ,  C08K5/11

CPC classification number: C08K3/22 ,  A61K8/19 ,  A61K8/731 ,  A61Q19/00 ,  C08K5/11 ,  C08K2003/2206 ,  C08K2201/005

Abstract: Provided is a cellulose acylate composition containing cellulose acylate particles and metal compound-containing particles. The total degree of substitution of the cellulose acylate is from 0.7 to 2.9. The metal compound is one or more types of compounds selected from an alkali metal compound and an alkaline earth metal compound. The composition is produced by adding one or more types of metal compounds selected from an alkali metal compound and an alkaline earth metal compound during and/or after removing a water-soluble polymer from a dispersion containing, as a dispersoid, cellulose acylate impregnated with a plasticizer to form cellulose acylate particles.

公开(公告)号：US20230190592A1

公开(公告)日：2023-06-22

申请号：US17926426

申请日：2021-05-14

Applicant: DAICEL CORPORATION

Inventor： Yuta SAKAMOTO ,  Yuichi SAKANISHI ,  Keiko KOBAYASHI ,  Masaya OMURA

IPC: A61K8/06 ,  A61K8/73 ,  A23D7/005

CPC classification number: A61K8/062 ,  A61K8/731 ,  A23D7/0053 ,  A61K2800/412

Abstract: Provided are an emulsifiable preparation that has little influence on the environment or the human body, that is excellent in long-term storage stability, and that imparts a pleasant touch feeling to the skin, and an aqueous cosmetic that contains the emulsifiable preparation, a food or beverage that contains the emulsifiable preparation, and a pharmaceutical composition that contains the emulsifiable preparation. The emulsifiable preparation includes: one or more aqueous components selected from the group consisting of water and alcohol; an oily component; and microparticles of a polymer compound, in which the microparticles contain cellulose acetate as the polymer compound, and the microparticles has an average particle size of 2 to 10 μm. The aqueous cosmetic contains the emulsifiable preparation. The food or beverage contains the emulsifiable preparation. The pharmaceutical composition contains the emulsifiable preparation.

公开(公告)号：US20200179261A1

公开(公告)日：2020-06-11

申请号：US16616160

申请日：2019-02-06

Applicant: DAICEL CORPORATION

Inventor： Keiko KOBAYASHI ,  Masaya OMURA

IPC: A61K8/73 ,  A61K8/81 ,  A61K8/36 ,  A61Q1/12 ,  A61Q1/10 ,  A61Q17/04

Abstract: An object of the present invention is to provide fine particles excellent in biodegradability and touch feeling. Disclosed are cellulose acetate particles, the cellulose acetate particles have an average particle size of 80 nm or more and 100 μm or less, a sphericity of 0.7 or more and 1.0 or less, and a surface smoothness of 80% or more and 100% or less, and the cellulose acetate has a total degree of acetyl substitution of 0.7 or more and 2.9 or less.