Alkyl benzoate solubilized organic sunscreen filters
An improved broad-spectrum sunscreen formulation is provided. The sunscreen formulation comprises at least one organic sunscreen filter, at least one of which avobenzone, and an alkyl benzoate comprising 25-55 mole % C12-14 alkyl benzoate and 45-75 mole % C12-C15 alkyl benzoate.
1. A sunscreen formulation comprising:
at least one organic sunscreen filter wherein said at least one organic sunscreen filter comprises avobenzone; and
an alkyl benzoate comprising 25-55 mole % C12-14 alkyl benzoate and 45-75 mole % C12-C15 alkyl benzoate.
2. The sunscreen formulation of claim 1 comprising 5-75 wt % said at least one organic sunscreen filter and 25-95 wt % said alkyl benzoate.
3. The sunscreen formulation of claim 2 comprising 30-60 wt % said at least one organic sunscreen filter and 40-70 wt % said alkyl benzoate.
4. The sunscreen formulation of claim 1 comprising at least 22 mole % to no more than 67 mole % C12 alkyl benzoate.
5. The sunscreen formulation of claim 1 wherein said at least one organic sunscreen filter further comprises at least one additional organic sunscreen filter selected from the group consisting of octocrylene, homosalate and octisalate.
6. The sunscreen formulation of claim 5 wherein said at least one additional organic sunscreen filter comprises octocrylene.
7. The sunscreen formulation of claim 5 wherein said at least one additional organic sunscreen filter comprises homosalate.
8. The sunscreen formulation of claim 5 wherein said at least one additional organic sunscreen filter comprises octisalate.
9. The sunscreen formulation of claim 1 wherein said C12-C14 alkyl benzoate comprises at least 65 to no more than 75 mole % C12 alkyl benzoate and at least 21 to no more than 28 mole % C14 alkyl benzoate and no more than 10 mole % C16 alkyl benzoate.
10. The sunscreen formulation of claim 1 wherein said C12-C15 alkyl benzoate comprises at least 15 to no more than 35 mole % C12 alkyl benzoate; at least 15 to no more than 35 mole % C13 alkyl benzoate; at least 15 to no more than 35 mole % C14 alkyl benzoate and at least 15 to no more than 35 mole % C15 alkyl benzoate.
11. The sunscreen formulation of claim 1 having a critical wavelength of at least 370 nm.
12. The sunscreen formulation of claim 11 wherein said critical wavelength is at least 380 nm.
13. The sunscreen formulation of claim 12 wherein said critical wavelength is at least 382 nm.
14. A sunscreen formulation comprising:
organic sunscreen filter comprising avobenzone and at least one additional organic sunscreen filter selected from the group consisting of octocrylene, homosalate and octisalate; and
an alkyl benzoate comprising 25-55 mole % C12-14 alkyl benzoate and 45-75 mole % C12-C15 alkyl benzoate;
and wherein said organic sunscreen formulation has a critical wavelength of at least 370 nm.
15. The sunscreen formulation of claim 14 comprising 5-75 wt % said organic sunscreen filter and 25-95 wt % said alkyl benzoate.
16. The sunscreen formulation of claim 15 comprising 30-60 wt % said organic sunscreen filter and 40-70 wt % said alkyl benzoate.
17. The sunscreen formulation of claim 14 comprising at least 22 mole % to no more than 67 mole % C12 alkyl benzoate.
18. The sunscreen formulation of claim 14 wherein said at least one additional organic sunscreen filter is octocrylene.
19. The sunscreen formulation of claim 14 wherein said at least one additional organic sunscreen filter is homosalate.
20. The sunscreen formulation of claim 14 wherein said at least one additional organic sunscreen filter is octisalate.
21. The sunscreen formulation of claim 14 wherein said C12-C14 alkyl benzoate comprises at least 65 to no more than 75 mole % C12 alkyl benzoate and at least 21 to no more than 28 mole % C14 alkyl benzoate and no more than 10 mole % C16 alkyl benzoate.
22. The sunscreen formulation of claim 14 wherein said C12-C15 alkyl benzoate comprises at least 15 to no more than 35 mole % C12 alkyl benzoate; at least 15 to no more than 35 mole % C13 alkyl benzoate; at least 15 to no more than 35 mole % C14 alkyl benzoate and at least 15 to no more than 35 mole % C15 alkyl benzoate.
23. The sunscreen formulation of claim 14 wherein said critical wavelength is at least 380 nm.
24. The sunscreen formulation of claim 23 wherein said critical wavelength is at least 382 nm.