Porous Silica-Based Particles Having Smooth Surface, Method for Production Thereof and Cosmetic Comprising Such Particles
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United States of America Patent
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app pub date -
Mar 24, 2015
filing date -
Dec 7, 2007
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Abstract
Disclosed are porous silica-based particles having high surface smoothness, a method for producing the porous silica-based particles, and a cosmetic comprising the porous silica-based particles. The porous silica-based particles have an average particle diameter of 0.5 to 30 μm and have a surface smoothness of a level to such an extent that, when the entire surface of the particle is observed from a photograph thereof taken by a scanning electron microscope (SEM) with a magnifying power of 10,000, a foreign matter attached to the surface thereof can be hardly seen.
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