Composite particle and process for producing the same
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United States of America Patent
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Apr 6, 2010
Grant Date -
Mar 30, 2006
app pub date -
Sep 22, 2005
filing date -
Sep 29, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention provides a composite particle, a process for producing the same, and cosmetics containing the same The invention relates to composite particles containing a polyolefin-based resin having a crystallization degree of 80% or less and zinc oxide and obtained by hot melt microencapsulation or spray cooling, or composite particles containing a polyolefin-based resin having a crystallization degree of 80% or less and zinc oxide, wherein the degree of remaining zinc oxide in the particles is 50 wt % or more after being dipped for 1 hour in 0.5 mol/L hydrochloric acid solution at 25° C. (solution composition: water and ethanol in equal volumes), a process for producing the composite particles, and cosmetics containing the composite particles.
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