Sunscreen compositions with improved water resistance of UVA sunscreen active agents
AssigneeEdgewell Personal Care Brands, LLC
InventorsJames SaNogueira, Glenn Wiener, Tao Zheng
Life of this patent
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Abstract
Sunscreen compositions, products and methods that include at least one UVA sunscreen active agent, at least one UVB sunscreen active agent, and one or more water insoluble film forming polymers. The compositions, products and methods may further include one or more active or inactive cosmetic ingredients. The water insoluble film forming polymers synergistically affect the UVA and UVB sunscreen active agents, in particularly the UVA sunscreen active agents by significantly enhancing the water resistance of the UVA sunscreen active agents after water exposure as determined by the SPF and UVAPF values measured before and after water exposure.
Claims19
An anhydrous topical sunscreen composition comprising
- one or more sunscreen active agents including UVA sunscreen active agents;
- at least two water insoluble film forming polymers selected from the group consisting of (i) trimethylsiloxysilicate, alone or in combination with (ii) acrylate/dimethicone copolymer, (iii) methyl dihydroabietate, and combinations thereof;
- and
- a first solvent comprising isododecane, and
- a second solvent comprising isohexadecane, disiloxane, diisopropyl adipate, or a combination thereof, wherein said at least two water insoluble film forming polymers are dissolved in the first and second solvents, and
- wherein the combination of said one or more water insoluble film forming polymers and said first and second solvents increase water resistance of UVA sunscreen active agents such that retention of UVAPF values after water exposure, as determined by UVAPF values measured before and after water exposure, is greater than at least 70%.
An anhydrous topical sunscreen composition comprising
- sunscreen actives including UVA sunscreen actives;
- at least two water insoluble film forming polymers selected from the group consisting of trimethylsiloxysilicate, acrylate/dimethicone copolymer, and methyl dihydroabietate;
- and
- a solvent mixture consisting essentially of isododecane in combination with one or more selected from the group consisting of isohexadecane, disiloxane, diisopropyl adipate and cyclopentasiloxane.
Dependencies are inferred from the claim text.