METHOD FOR PRODUCING LARGE-DIAMETER SIO2 POWDER, AND COSMETIC COMPOSITION CONTAINING SAME
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United States of America Patent
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Issued Date -
Jun 27, 2024
app pub date -
Mar 3, 2021
filing date -
Mar 27, 2020
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Abstract
The present invention pertains to a method for producing SiO2 powder having a particle size of 1.0-20.0 μm, the method comprising the steps of: adding CH3COOH to H2O and stirring; after the stirring, adding TEOS and stirring; removing the synthetic stock solution in a filter press, and washing the solution with H2O; and after the washing, drying the solution to obtain dried silica particle powder having a moisture content of 0.5% or less. Also provided is monodispersed amorphous spherical silica particle powder having a particle size of 1.0-20.0 μm, a whiteness of at least 90, and a purity of at least 99.9%. Large-diameter silica particles of the present invention are monodispersed particles having similar particle sizes, are spherical and have a smooth surface, can be used as cosmetic scrubs due to having a soft feeling of use without causing skin irritation, and have the advantage of being environmentally friendly.
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