Delivery system for inorganic sunscreens
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United States of America Patent
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Jul 17, 2001
Grant Date -
N/A
app pub date -
Mar 24, 2000
filing date -
Mar 29, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A novel delivery system for physical, inorganic sunscreens for use in sunscreen preparations is disclosed. One or more inorganic sunscreen agents, such as micronized zinc oxide and micronized titanium dioxide, is dispersed in a solid dispersion vehicle preferably selected from the group consisting of stearyl benzoate, behenyl benzoate and arachidyl benzoate, to thereby produce a solid dispersion of inorganic sunscreen agents for use in sun-screen preparations. The micronized sunscreens are embedded in a solid product which does not require mixing or regrinding before use. A solid formulation avoids the problems inherent in a fluid emulsion or dispersion, i.e., migration or settling out of the contents, which requires mixing and/or regrinding before use.
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