BIODEGRADABLE SPHERICAL PARTICLES AND PRODUCTION METHOD THEREFOR
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United States of America
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Mar 6, 2025
app pub date -
May 25, 2023
filing date -
May 25, 2023
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Abstract
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.
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