COMPOSITE PARTICLES

PROBLEM TO BE SOLVED: To provide composite particles comprising at least one core particle coated with at least one solid UV filter, the composite particles not losing UV protection ability which is improved in the presence of a particular anionic surfactant, and to provide cosmetic compositions com...

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Bibliographic Details
Main Author MATSUFUJI SHINICHI
Format Patent
LanguageEnglish
Japanese
Published 22.06.2017
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Summary:PROBLEM TO BE SOLVED: To provide composite particles comprising at least one core particle coated with at least one solid UV filter, the composite particles not losing UV protection ability which is improved in the presence of a particular anionic surfactant, and to provide cosmetic compositions comprising the composite particles, the compositions not losing the improved UV protectivity even when washed with water.SOLUTION: The present invention relates to composite particles comprising at least one (a) core particle, at least one portion of the core particle (a) being covered with at least one first coating layer comprising at least one solid UV filter (b), at least a portion of the first coating layer (c) being covered with at least one second coating layer comprising at least one hydrophobic block copolymer; and to a cosmetic composition comprising the composite particles. The composite particles according to the invention can maintain UV protection ability improved in the presence of a particular anionic surfactant, and the composition according to the invention can maintain UV protectivity improved even when washed with water.SELECTED DRAWING: None 【課題】少なくとも1種の固体UVフィルターで被覆された少なくとも1種のコア粒子を含む複合粒子であって、特定のアニオン性界面活性剤の存在下で向上したUV防御性能を失わない複合粒子、並びに該複合粒子を含む化粧用組成物であって、水で洗浄したときでも向上したUV防御を失わない組成物を提供すること。【解決手段】本発明は、(a)少なくとも1種のコア粒子を含む本発明による複合粒子であって、(a)コア粒子が、(b)少なくとも1種の固体UVフィルターを含む少なくとも1つの第1のコーティング層で少なくとも一部分覆われており、第1のコーティング層が、(c)少なくとも1種の疎水性ブロックコポリマーを含む少なくとも1つの第2のコーティング層で少なくとも一部分覆われている、複合粒子、並びに該複合粒子を含む化粧用組成物に関する。本発明による複合粒子は、特定のアニオン性界面活性剤の存在下でも向上したUV防御性能を維持することができ、本発明による組成物は、水で洗浄する場合でも向上したUV防御を維持することができる。【選択図】なし
Bibliography:Application Number: JP20150242986