Hollow silica particles and method for producing the same
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United States of America Patent
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Mar 31, 2015
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Sep 19, 2013
app pub date -
Mar 13, 2012
filing date -
Mar 13, 2012
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Abstract
The present invention provides a method of producing hollow silica particles. First, an amine-ketimine compound is mixed with water to obtain a hydrophobic core dispersion, and then an organic siloxane compound and/or a coupling reagent is added into the hydrophobic core dispersion to form a core-shell silica dispersion. Then, the core-shell silica precipitate is separated from the core-shell silica dispersion, and then it is further dispersed and washed by a low carbon alcohol solution. Finally, hollow silica particles in accordance with the present invention are produced. In addition, the present invention also provides hollow silica particles produced by the afore-mentioned method without using any additional surfactant.
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