Particulate metal oxide particles comprising a metal oxide core and a coating layer comprising an inorganic material, a silane coupling agent and/or a hydrophobizing agent
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United States of America Patent
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Dec 22, 2020
Grant Date -
Jul 30, 2015
app pub date -
Jul 19, 2013
filing date -
Aug 6, 2012
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Abstract
A particulate metal oxide has a metal oxide core and a coating layer containing an inorganic material and (i) a quaternary silane coupling agent, and/or (ii) a silane coupling agent and a hydrophobizing agent. Preferred materials are titanium dioxide core particles, an amino organosilane coupling agent and a fatty acid hydrophobizing agent. The particulate metal oxide is suitable for use in forming a dispersion, and the particles and dispersion can be used in an end-use sunscreen composition which is transparent, exhibits effective UV absorption properties, reduced photoactivity, and/or improved skin feel.
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