SPHERICAL STANNOUS COMPATIBLE SILICA PARTICLES FOR REDUCED RDA
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United States of America Patent
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Oct 7, 2021
app pub date -
Jun 12, 2019
filing date -
Jun 12, 2018
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Silica particles having a d50 median particle size from 8 to 20 μm, a sphericity factor (S80) of at least 0.9, a BET surface area from 0.1 to 8 m2/g, a total mercury intrusion pore volume from 0.35 to 0.8 cc/g, and a loss on ignition from 3 to 7 wt. %, are disclosed, as well as methods for making these silica particles, and dentifrice compositions containing the silica particles.
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