ZINC OXIDE-CONTAINING COMPOSITE PARTICLES, ULTRAVIOLET-SHIELDING COMPOSITION, AND COSMETIC
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United States of America Patent
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Jun 20, 2019
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Jul 13, 2017
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Aug 4, 2016
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Zinc oxide-containing composite particles of the present invention each include: a dense matrix formed of silica and a polysilsesquioxane; and zinc oxide particles dispersed within the matrix. The content of the polysilsesquioxane in the matrix is 30 mass % to 70 mass %. The zinc oxide-containing composite particles of the present invention have high acid resistance and are capable of maintaining acid resistance even upon contact with water.
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