BIODEGRADABLE SPHERICAL PARTICLES AND PRODUCTION METHDO THEREFOR

BIODEGRADABLE SPHERICAL PARTICLES AND PRODUCTION METHDO THEREFOR

Biodegradable spherical particles contain a biodegradable polymer as a main component. The biodegradable spherical particles have a particle size variation coefficient CV of 40% or less, and a biodegradation degree on the fifth day in a biodegradability test in accordance with OECD TG301F of 40% or...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: OMURA, Masaya, UENO, Mizuki
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
GENERAL PROCESSES OF COMPOUNDING
HUMAN NECESSITIES
HYGIENE
MEDICAL OR VETERINARY SCIENCE
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS
THEIR PREPARATION OR CHEMICAL WORKING-UP
WORKING-UP
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Beschreibung
Zusammenfassung:Biodegradable spherical particles contain a biodegradable polymer as a main component. The biodegradable spherical particles have a particle size variation coefficient CV of 40% or less, and a biodegradation degree on the fifth day in a biodegradability test in accordance with OECD TG301F of 40% or less. A cosmetic composition contains the biodegradable spherical particles. A method for producing the biodegradable spherical particles includes preparing a mixture by mixing a biodegradable polymer, a plasticizer, and a water-soluble polymer; melt-kneading the mixture at 200°C or higher and 280°C or lower to yield a kneaded product; and removing the water-soluble polymer from the kneaded product.