Sunscreen compositions and methods of use
View Patent ↗The invention encompasses additives for addition to a bodywash, where the additives contain one or more sunscreens, and where a bodywash which contains the additive imparts to the skin an SPF of at least about 2, in some cases at least about 5, or 10, or 15. Also described are methods of making and using the additives.
1. An additive for addition to a bodywash, wherein the additive comprises a sunscreen encapsulated in sol-gel microcapsules, and wherein, when the additive is combined with said bodywash, after a single application of the bodywash to skin and rinsing, the skin is protected from sunlight with an average SPF of at least 15.
2. The additive of claim 1 , wherein the sunscreen is an organic sunscreen.
3. The additive of claim 2 , wherein the organic sunscreen is selected from the group consisting of aminobenzoic acid, avobenzone, cinnoxate, dioxybenzone, homosalate, menthyl anthranilate, octocrylene, octyl methoxycinnamate, octyl salicylate, oxybenzone, padimate O, phenylbenzimidazole sulfonic acid, sulisobenzone, and trolamine salicylate.
4. The additive of claim 2 wherein the organic sunscreen is a cinnamate derivative.
5. The additive of claim 2 wherein the organic sunscreen is octyl methoxycinnamate.
6. The additive of claim 2 , comprising 2 organic sunscreens.
7. The additive of claim 2 , comprising 3 organic sunscreens.
8. The additive of claim 7 , wherein the 3 organic sunscreens are selected from the group consisting of aminobenzoic acid, avobenzone, cinnoxate, dioxybenzone, homosalate, menthyl anthranilate, octocrylene, octyl methoxycinnamate, octyl salicylate, oxybenzone, padimate O, phenylbenzimidazole sulfonic acid, sulisobenzone, and trolamine salicylate.
9. The additive of claim 8 , wherein the 3 organic sunscreens are octyl methoxycinnamate, octocrylene, and avobenzone.
10. The additive of claim 7 , further comprising an inorganic sunscreen.
11. The additive of claim 10 , wherein the inorganic sunscreen is selected from the group consisting of titanium dioxide and zinc oxide.
12. The additive of claim 11 , wherein the inorganic sunscreen is titanium dioxide.
13. The additive of claim 10 , wherein the inorganic sunscreen is coated with silica.
14. The additive of claim 2 , further comprising an inorganic sunscreen.
15. The additive of claim 14 , wherein the inorganic sunscreen is selected from the group consisting of titanium dioxide and zinc oxide.
16. The additive of claim 1 , further comprising a cationic polymer.
17. The additive of claim 1 , wherein the cationic polymer is a polyquaternium.
18. The composition of claim 17 wherein the polyquaternium is polyquaternium-4, -7, -11, -22, -27, -44, -51, or -64.
19. The additive of claim 1 , wherein the cationic polymer is polyquaternium-4.
20. The additive of claim 1 , further comprising a film former.
21. The additive of claim 20 , wherein the film former comprises petrolatum.
22. The additive of claim 20 further comprising a preservative.
23. The additive of claim 20 further comprising an antioxidant that is stable upon exposure to sunlight.
24. The additive of claim 1 further comprising a chelating agent.
25. The additive of claim 24 wherein the chelating agent is EDTA.
26. The additive of claim 1 , wherein the sunscreen is a UVB absorber sunscreen, and further comprising a UVA absorber sunscreen.
27. The additive of claim 26 , further including a physical blocker sunscreen.
28. The additive of claim 27 , wherein
(i) the UVB-absorber sunscreen is selected from the group consisting of aminobenzoic acid, cinoxate, dioxybenzone, homosalate, octocrylene, octyl methoxycinnamate, octyl salicylate, oxybenzone, padimate O, phenylbenzimidazole sulfonic acid, sulisobenzone, and trolamine salicylate;
(ii) the UVA-absorber sunscreen is selected from the group consisting of avobenzone and menthyl anthranilate; and
(iii) the physical blocker sunscreen is selected from the group consisting of titanium dioxide and zinc oxide.
29. The additive of claim 1 , wherein an average of at least 90% of the encapsulated sunscreen remains encapsulated after application of the bodywash to the skin and rinsing.
30. The additive of claim 26 further comprising a cationic polymer.
31. The additive of claim 1 wherein the SPF of at least 15 is maintained for at least about 4 hours after rinsing.
32. The additive of claim 1 wherein, when the additive is combined with said bodywash, after application of the bodywash to skin and rinsing, the sunscreen penetrates no further than 50 microns into the skin after application followed by rinsing.
33. The additive of claim 32 wherein the sunscreen penetrates no further than 30 microns into the skin after application followed by rinsing.
34. The additive of claim 1 wherein the additive comprises a UVA-absorbing sunscreen, a UVB-absorbing sunscreen, a physical blocker sunscreen, and a cationic polymer, and wherein at least one of the UVA-absorbing sunscreen and the UVB-absorbing sunscreen is encapsulated in the sol-gel microcapsules.
35. The sunscreen additive of claim 34 wherein the physical blocker sunscreen is coated with silica.
36. The additive of claim 34 , wherein the cationic polymer is a polyquaternium.
37. The composition of claim 36 wherein the polyquaternium is polyquaternium-4, -7, -11, -22, -27, -44, -51, or -64.
38. The additive of claim 36 , wherein the cationic polymer is polyquaternium-4.
39. The additive of claim 34 , further comprising a film former.
40. The additive of claim 34 further comprising a preservative.
41. The additive of claim 34 further comprising an antioxidant that is stable upon exposure to sunlight.
42. The additive of claim 1 , further comprising a long-chain silicone polymer with chromophores attached.
43. The composition of claim 34 comprising at least 2 UVB-absorber sunscreens.
44. The composition of claim 34 , wherein
(i) the UVB-absorber sunscreen is selected from the group consisting of aminobenzoic acid, cinoxate, dioxybenzone, homosalate, octocrylene, octyl methoxycinnamate, octyl salicylate, oxybenzone, padimate O, phenylbenzimidazole sulfonic acid, sulisobenzone, and trolamine salicylate;
(ii) the UVA-absorber sunscreen is selected from the group consisting of avobenzone and menthyl anthranilate;
(iii) the physical blocker sunscreen is selected from the group consisting of titanium dioxide and zinc oxide; and
(iv) the cationic polymer is a polyquaternium.
45. The composition of claim 44 comprising octyl methoxycinnamate, octocrylene, avobenzone, titanium dioxide, and a polyquaternium selected from the group consisting of polyquaternium-4, -7, -11, -22, -27, -44, -51, or -64.
46. The composition of claim 45 wherein the polyquaternium is polyquaternium-4.
47. The composition of claim 46 wherein
(i) the octyl methoxycinnamate is present at about 4.5–9%;
(ii) the octocrylene is present at about 0.5–15%;
(iii) the avobenzone is present at about 2–4%; and
(iv) the titanium dioxide is present at about 3–9%.
48. The composition of claim 47 wherein the polyquaternium-4 is present at about 0.5–3%.
49. The composition of claim 46 wherein
(i) the octyl methoxycinnamate is present at about 7.6%;
(ii) the octocrylene is present at about 11.3%;
(iii) the avobenzone is present at about 2.8%; and
(iv) the titanium dioxide is present at about 6.5%.
50. The composition of claim 49 wherein the polyquaternium-4 is present at about 2.8%.
51. The composition of claim 50 further comprising a film former.
52. The composition of claim 51 wherein the film former comprises petrolatum.
53. The composition of claim 52 wherein the film former further comprises dimethicone.
54. The composition of claim 34 further comprising a non-sunscreen active.
55. The composition of claim 54 wherein the non-sunscreen active is selected from the group consisting of sunless tanning actives, skin lightening actives, anti-acne actives, anti-skin wrinkling actives, vitamins, nonsteroidal anti-inflammatory actives, anesthetic actives, analgesic actives, anti-pruritic actives, antifungals, antibacterials, and antiparasitics, anti-allergenics, medicinal actives, skin rash, skin disease and dermatitis medications, insect repellant actives, antioxidants, hair growth promoter, hair bleaching agents, deodorant compounds, and mixtures and combinations thereof.
56. The additive of claim 1 comprising a first component comprising a first sunscreen and a cationic polymer, and a second component comprising a second sunscreen, wherein at least one of the first sunscreen and the second sunscreen is encapsulated in sol-gel microcapsules, and wherein the first component and the second component are added to the bodywash separately.
57. The sunscreen additive of claim 56 wherein the first component comprises an absorber sunscreen and the second component comprises a physical blocker sunscreen.
58. A method for preparing a bodywash comprising the additive of claim 56 , the method comprising combining the first component with a bodywash, then separately combining the second component with the bodywash.