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KMID : 0604519990250040043
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Journal of the Society of Cosmetic Scientists of Korea
1999 Volume.25 No. 4 p.43 ~ p.50
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PREPATION OF THE PLANARIZED SIO₂ PARTICLES TO MAKE IDEAL SIO₂/TIO₂COMPOSITE PARTICLES FOR COSMETIC PRODUCTS
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Shin, Dal-Sik
kim, Kwang-Soo/Lee, Ok-Sob/Lee, Sung-Ho
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Abstract
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The planarized SO_(2) particles were prepared by two-step reduction method of making much smaller particles, micron-sized ones, to improve spreadability, adherence, and smoothness. Various pigments known as flaky extender usually have terrace layers on their surfaces, but SiO_(2) particles in this study exhibit a smooth surface structure. These single SiO_(2) particles were used as core particles to prepare the composite particles coated with ultra fine TiO_(2) particles by a homogeneous precipitation method. The thickness and the morphology of the deposited TiO_(2)layers could be modified by adjusting the reactant concentrations, the reaction time and the temperature. The characteristics of SiO_(2)/TiO_(2) composite in the field of color cosmetics are to give an UV-cut effect and to enhance the chroma of human skin color, one of optical properties.
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KEYWORD
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