This sunscreen lotion formulation is designed to provide U.S. broad spectrum (critical wavelength ≥ 370 nm), label SPF 50 performance. SolaStay® S1 contributes to photoprotection through stabilization of this Titanium Dioxide-based formulation by mitigating the photocatalytic and reactive oxygen species generating activities of the oxide to improve sunscreen performance. Olivem® 1000, the first PEG-free self-emulsifying biomimetic multifunction ingredient, and botanically-based HallStar® GMS Pure provide the basis for a stable emulsion. HallBrite® BHB, Sensolene® and Biochemica® Matcha Green Tea butter are included to enhance spreadability and contribute to elegant emollience. This formulation was subjected to in vitro analysis and delivered SPF ~54, PFA (PPD) ~7 broad spectrum performance with critical wavelength 374 nm.
| Phase | INCI Name [INN/USAN] (Other Information) | Trade Name | % Wt | Function |
|---|---|---|---|---|
| A | Butyloctyl Salicylate | HALLBRITE® BHB* | 5.00 | Emollient |
| Ethylhexyl Methoxycrylene | SolaStay® S1* | 2.00 | Photostabilizer | |
| Ethylhexyl Methoxycinnamate [Octinoxate] | 7.50 | UV Filter / Sunscreen Agent | ||
| Ethylhexyl Olivate | SENSOLENE® | 2.00 | Multifunctional Lipid | |
| Prunus Amygdalus Dulcis (Sweet Almond) Oil, Hydrogenated Vegetable Oil, Camellia Sinensis Leaf Powder | BIOCHEMICA® MATCHA GREEN TEA | 1.50 | Emollient | |
| B | Titanium Dioxide (and) Aluminum Hydroxide | 3.80 | UV Filter / Sunscreen Agent | |
| C | VP/Eicosene Copolymer | 1.00 | Film Former | |
| Glyceryl Stearate | HALLSTAR® GMS PURE | 2.00 | Emulsifier | |
| Cetearyl Olivate, Sorbitan Olivate | OLIVEM® 1000 | 3.00 | Self-Emulsifier / Liquid Crystal Maker | |
| D | Water (Aqua) (deionized) | up to 100 | Volatile Carrier | |
| Disodium EDTA | 0.05 | Chelating Agent | ||
| Xanthan Gum (pharma grade) | 0.30 | Thickener (Aqueous) | ||
| E | Preservative | a.n. | Preservative | |
| Glycerin | 4.00 | Humectant | ||
| F | Silica (spherical, 12 µm) | 2.00 | Deoiling Agent |
| 1 | To a secondary vessel add phase A, start mixing and slowly add phase B to phase A with continued mixing. |
| 2 | Heat phase AB to 80°C and then add phase C ingredients individually with mixing. |
| 3 | To the main vessel add Water of phase D, start mixing, add Disodium EDTA, then add Xanthan Gum and heat this phase to 75°C. |
| 4 | When both phases are homogeneous and at their designated temperatures, slowly add phase oil ABC to water phase D with prop mixing. |
| 5 | Homogenize combined for 3 minutes and resume prop mixing. |
| 6 | Start cooling and when batch is below 50°C add, with mixing, premix of phase E and then phase F, mixing well. |
| 7 | Replace any water lost to evaporation and mix batch until smooth and at desired filling temperature. |
| Appearance | Off-white to pale yellow, thick lotion |
| Viscosity (Brk, RVDV-II, T-D, 20 rpm, after 24 h at room temperature; mPa·s) | 2800 - 4800 |
| pH | 5.5 - 6.5 |
*Patented and Patent Pending
The information presented herein is believed to be accurate and reliable, but no warranty or guarantee, expressed or implied, is made regarding the information or the performance of any product. Further, nothing contained herein shall be taken as any inducement or recommendation to use, manufacture or sell that may infringe any patents or any other proprietary rights now or hereafter in existence, nor to imply compliance with any regulatory requirements
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