Water-in-oil emulsions
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United States of America Patent
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Aug 6, 1996
Grant Date -
N/A
app pub date -
Mar 1, 1993
filing date -
Feb 29, 1992
priority date (Note) -
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Abstract
The invention concerns a process for producing a water-in-oil emulsion comprising mixing an oil dispersion of particles of a metallic oxide having a primary particle size less than 0.2 micron with one or more emulsifiers and an aqueous phase. The method enables the production of such emulsions containing relatively small quantities of emulsifiers and a novel emulsion made available by the invention contains less than 1% by weight of emulsifiers, 10 to 60% by weight of an oil phase and at least 40% by weight of an aqueous phase. The emulsions so formed are useful in preparing UV absorbing compositions such as sunscreens, skin protectants, moisturizers and after-sun lotions.
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