This sunscreen lotion is designed to meet US FDA requirements for broad spectum sun protection. SolaStay® S1 is incorporated to mitigate the photocatalytic activity of the oxide. This composition was subjected to in vitro analysis and delivered SPF ~45, PFA (PPD) ~13 performance with critical wavelength 378 nm.
Phase | INCI Name [INN/USAN] (Other Information) | Trade Name | % Wt | Function |
---|---|---|---|---|
A | Water (Aqua) (deionized) | up to 100 | Volatile Carrier | |
Butylene Glycol | 3.00 | Humectant | ||
Disodium EDTA | 0.05 | Chelating Agent | ||
Xanthan Gum (pharma grade) | 0.30 | Thickener (Aqueous) | ||
Microcrystalline Cellulose, Cellulose Gum | 1.50 | Thickener (Aqueous) | ||
B | Caprylic/Capric Triglyceride | 5.00 | Emollient | |
Ethylhexyl Salicylate [Octisalate] | 5.00 | UV Filter / Sunscreen Agent | ||
Ethylhexyl Methoxycinnamate [Octinoxate] | 6.00 | UV Filter / Sunscreen Agent | ||
Ethylhexyl Methoxycrylene | SolaStay® S1* | 3.00 | Photostabilizer | |
C | Zinc Oxide [Zinc Oxide] (30-200 nm primary particle size) | 10.00 | UV Filter / Sunscreen Agent | |
D | Sorbitan Olivate | OLIVEM® 900 | 1.00 | Co-emulsifier |
Cetearyl Olivate, Sorbitan Olivate | OLIVEM® 1000 | 4.00 | Self-Emulsifier / Liquid Crystal Maker | |
E | Preservative | a.n. | Preservative | |
Cyclopentasiloxane | 3.00 | Volatile Carrier |
1 | To a secondary vessel add the liquids of phase A, start mixing, add the powders of phase A in order, and heat to 75°C. |
2 | To the main vessel, add phase B, start mixing, add phase C to phase B and heat phase BC to 75°C. |
3 | Add phase D to phase BC with mixing and, after dissolved, slowly add phase A to phase BCD, mixing well. |
4 | Homogenize phase ABCD for 3 minutes, start cooling and add phase E when bartch is below 50°C. |
5 | Contiune mixing until batch is at room temperature, replacing any water lost to evaporation and mixing until smooth. |
Appearance | Very shiny and soft cream, good spreadability, nourishing after-feel. |
Viscosity (Brk, RVDV-II, T-D, 20 rpm, after 24 h at room temperature; mPa·s) | 6000 - 9000 |
pH | 7.0 - 8.0 |
*Patented and Patent Pending
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