Self adapting polymers for anhydrous sunscreen formulations
Compositions comprising sun-care actives and self adapting polymers are disclosed. Self adapting polymers align themselves with the hydrophilic group pointing to the surface during application thus delivering an aesthetically pleasing surface to the consumers with a pleasant after feel. These polymers then rearrange upon contact with water so that the hydrophobic groups now point to the surface which then increases the water resistance of the formulation.
1. An anhydrous sprayable composition consisting of a sun-care active, a self-adapting polymer which aligns with a hydrophilic group pointing to the surface during application to a surface, and anhydrous ethanol,
wherein the self-adapting polymer is Vinylcaprolactam(Vcap)/Vinylpyrrolidone (VP)/Dimethylaminoethyl methacrylate copolymer and is present in 0.05 wt. % to 10 wt. % of the total weight of the composition,
the sun-care active consists of (i) avobenzone and (ii) at least one additional sun-care active selected from the group consisting of benzophenone-3, p-aminobenzoic acid (PABA), camphor benzalkonium methosulfate, phenylbenzimidazole sulfonic acid, terephthalidene dicamphor sulfonic acid, benzylidene camphor sulfonic acid, octocrylene, polyacrylamidomethyl benzylidene camphor, ethylhexyl methoxycinnamate, PEG-25 PABA, isoamyl p-methoxycinnamate, ethylhexyl triazone, drometrizole trisiloxane, diethylhexyl butamido triazone, 4-methylbenzylidene camphor, 3-benzylidene camphor, ethylhexyl salicylate, ethylhexyl dimethyl PABA, benzophenone-4, benzophenone-5, methylene bis-benztriazolyl tetramethylbutylphenol, disodium phenyl dibenzimidazole tetrasulfonate, bis-ethylhexyloxyphenol methoxyphenol triazine, polysilicone-15, and combinations thereof,
the composition does not contain a neutralizer,
the composition is a homogeneous single-phase and exhibits an increase in hydrophobicity after contact with water,
the composition exhibits a percent increase in SPF (sun protection factor) boost of at least 50% as compared to control compositions that do not contain the polymer, and
wherein the anhydrous ethanol is present in 59.0 wt. % to 65.0 wt. % of the total weight of the composition.
2. The composition according to claim 1 , having an SPF of at least 10.
3. The composition according to claim 1 , wherein the one or more sun-care actives are present in an amount of 1 wt. % to 50 wt. % of the total weight of the composition.
4. The composition according to claim 1 , wherein the self adapting polymer comprises 0.25% wt. % to 5 wt % of the total weight of the composition.
5. The composition according to claim 4 , wherein the self adapting polymer comprises 0.5 wt. % to 2 wt. % of the total weight of the composition.
6. The composition according to claim 1 , wherein the composition exhibits an increase in contact angle of at least 5° after immersion in water.
7. The composition according to claim 1 , further comprising one or more additional components selected from the group consisting of skin-feel additives, moisturizing agents film former/waterproofing agents, pH adjuster/chelating agents, emulsifiers, preservatives, and mixtures thereof.
8. The composition according to claim 1 , wherein the composition does not contain an amine neutralizer.
9. The composition according to claim 1 , wherein the Vinylcaprolactam(Vcap)/Vinylpyrrolidone (VP)/Dimethylaminoethyl methacrylate copolymer is present in 2 wt. % to 3 wt. % of the total weight of the composition and wherein the avobenzone is present in 3 wt. % of the total weight of the composition.