Fine powder of hydrophobic titanium oxide, and method for producing it
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United States of America Patent
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May 1, 2001
Grant Date -
N/A
app pub date -
Mar 31, 1999
filing date -
Mar 31, 1998
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Abstract
A fine powder of hydrophobic titanium oxide, which, when added to toner powder, gives it high flowability and good electrification stability. The titanium oxide is prepared by hydrolyzing a volatile titanium compound while in a high-temperature vapor-phase condition, in the presence of a combustible or incombustible gas, and has a BET specific surface area of from 55 to 150 m.sup.2 /g and an anatase/rutile crystal structure with a ratio of anatase falling between 0.3 and 0.98. It is processed for surface modification with a silane coupling agent and/or a silicone compound to produce a fine powder of hydrophobic titanium oxide.
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