Highly dispersible fine hydrophobic silica powder and process for producing the same
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United States of America Patent
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Feb 24, 2009
Grant Date -
Mar 30, 2006
app pub date -
Dec 25, 2003
filing date -
Dec 27, 2002
priority date (Note) -
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Abstract
/g. This high dispersible hydrophobic fine silica powder can be made by mixing a hydrophobic agent comprising a volatile organic silicon compound in the gas state with a fine silica powder in a fluidized bed type reaction vessel at the time of a hydrophobic treatment, and controlling a gas flow rate to more than 5.0 cm/sec at the time of this mixing.
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