OIL-IN-WATER TYPE EMULSION COSMETIC

• Main Authors: KANAMARU TETSUYA, ENOMOTO AYUMI, KADOTA YASUHIKO, NAOI KAYOKO
• Format: Patent
• Language: English; Japanese
• Published: 07.07.2022
• Subjects: HUMAN NECESSITIES; HYGIENE; MEDICAL OR VETERINARY SCIENCE; PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES; SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS

To provide an oil-in-water type emulsion cosmetic capable of improving emulsion stability without using a cyclic silicone, and having a high ultraviolet protection effect.SOLUTION: There is provided an oil-in-water type emulsion cosmetic which comprises (A) silica-coated zinc oxide subjected to hydrophobizing treatment having a coating layer containing silica in which the outermost surface is subjected to hydrophobizing treatment with a hydrophobization treatment agent and (B) a volatile non-cyclic silicone and contains the silica-coated zinc oxide subjected to hydrophobizing treatment in the inner phase, wherein the content of silica is 10 mass% or more based on the total amount of the silica-coated zinc oxide subjected to hydrophobizing treatment (A) and the content of the hydrophobization treatment agent is 9 mass% or more and less than 14 mass% based on the total amount of the silica-coated zinc oxide subjected to hydrophobizing treatment (A).SELECTED DRAWING: None 【課題】水中油型乳化化粧料を、環状シリコーンを用いなくても乳化安定性を向上することができ、高い紫外線防御効果を有するものとする。【解決手段】水中油型乳化化粧料を、（Ａ）最外表面が疎水化処理剤で疎水化処理され、シリカを含む被覆層を有する疎水化処理シリカ被覆酸化亜鉛と、（Ｂ）揮発性非環状シリコーンと、を含む水中油型乳化化粧料であって、（Ａ）疎水化処理シリカ被覆酸化亜鉛を内相に含み、（Ａ）疎水化処理シリカ被覆酸化亜鉛全量に対するシリカの含有量が１０質量％以上で、（Ａ）疎水化処理シリカ被覆酸化亜鉛全量に対する前記疎水化処理剤の含有量が９質量％以上１４質量％未満とする。【選択図】なし