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US 10,517,814 B2Granted
Sunscreen compositions with natural waxes for improved water resistance
AssigneeEdgewell Personal Care Brands, LLC
InventorsHui-Ing Donna Hwang, Alexander Naranjo, Patricia Lynn Scott
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Abstract
A sunscreen composition having improved water resistance comprising (i) a sunscreen active agent; (ii) a water resistant agent comprising a natural wax having a Damping Factor of less than 1.0 in a linear viscoelastic range at body temperature; and (iii) an emulsifier or a surfactant capable of stabilizing an emulsion of components (i) to (iii), wherein said sunscreen composition maintains at least 75%, preferably at least 85%, and most preferably at least 99%, of its static SPF after water immersion for 4 hours.
Claims18
A sunscreen composition comprising:
- (i) 0.1 wt. % to 45 wt. % of a sunscreen active agent;
- (ii) 0.1 wt. % to 5 wt. % of a water resistant agent comprising myrica wax;
- (iii) 0.1 wt. % to 10 wt. % of an emulsifier comprising cetyl polyethylene glycol (PEG)/polypropylene glycol (PPG)-10/1 dimethicone and lauryl PEG-8 dimethicone;
- and
- (iv) 0.5 wt. % to 37.5 wt. % of an emollient.
2 more elements
Dependencies are inferred from the claim text.