Sunscreen compositions
View Patent ↗Sunscreen compositions containing a discontinuous oil phase dispersed in a continuous water phase, at least 10% by weight of an organic UV-filter, a water-insoluble, C 2 -C 8 , liquid silicone, a branched fatty acid ester of a polyprotic carboxylic acid; and at least 2% by weight of a mineral particulate having a starch coating applied to the surface thereof.
1. A composition, comprising:
a continuous water phase,
a discontinuous oil phase dispersed in said continuous water phase,
about 10 percent or more by weight of an organic UV-filter,
a water-insoluble, C 2 -C 8 , liquid silicone,
a branched fatty acid ester of a polyprotic carboxylic acid; and
about 2 percent or more by weight of a mineral particulate, said mineral particulate comprising a mineral portion and a starch coating portion applied to the surface of said mineral portion so as to at least partially coat the mineral portion.
2. The composition of claim 1 , wherein said mineral portion comprises silica.
3. The composition of claim 1 , wherein said mineral particulate comprises from about 80 percent to about 98 percent by weight of said mineral portion and from about 2 percent to about 20 percent by weight of said starch coating portion.
4. The composition of claim 1 comprising from about 4 percent to about 10 percent by weight of said mineral particulate.
5. The composition of claim 1 , wherein said branched fatty acid ester of a polyprotic carboxylic acid comprises an octyldodecyl citrate polyester.
6. The composition of claim 1 , wherein said water-insoluble, C 2 -C 8 liquid silicone comprises ethyl methicone.
7. The composition of claim 1 , wherein said mineral particulate has a mineral oil absorption capacity of about 20 ml/100 g or greater.
8. The composition of claim 1 , wherein said organic UV-filter is selected from the group consisting of octocrylene, a benzotriazole, anisotriazine, an ester of salicylic acid, an ester of cinnamic acid, 1-(4′-tert.butylphenyl)-3-(4′-methoxyphenyl)propane-1, 3-dione, 4-tert-butyl-4′-methoxydibenzoylmethane and 1-phenyl-3-(4′-isopropylphenyl)-propane-1, 3-dione.
9. The composition of claim 4 wherein said mineral particulate comprises a silica having a rice starch applied to the coating thereof, and wherein said composition further comprises a gelling agent.
10. The composition of claim 9 having a stability of 3 months at 40° C.
11. The composition of claim 1 having a stability of 2 weeks at 40° C.