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. HallBrite® BHB, Sensolene® and Biochemica® Matcha Green Tea butter are included to enhance spreadability and contribute to elegant emollience. In vitro analysis suggests SPF ~63, PFA (PPD) ~13 performance with critical wavelength 379 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 | 1.00 | Emollient | |
| B | Titanium Dioxide [Titanium Dioxide], Aluminum Hydroxide (60 nm primary particle size) | 3.80 | UV Filter / Sunscreen Agent | |
| C | VP/Eicosene Copolymer | 1.00 | Film Former | |
| Cetearyl Alcohol | HALLSTAR® TA-1618 CETEARYL ALCOHOL | 0.35 | Emulsion Stabilizer | |
| Glyceryl Stearate | HALLSTAR® GMS PURE | 2.20 | Emulsifier | |
| PEG-100 Stearate | HALLSTAR® PEG 4400 MS | 2.40 | Emulsifier | |
| D | Styrene/Acrylates Copolymer (hollow spherical, 325 nm) | 2.40 | SPF Booster | |
| E | Water (Aqua) (deionized) | up to 100 | Volatile Carrier | |
| Disodium EDTA | 0.05 | Chelating Agent | ||
| Xanthan Gum (pharma grade) | 0.30 | Thickener (Aqueous) | ||
| F | Preservative | a.n. | Preservative | |
| Glycerin | 4.00 | Humectant | ||
| G | 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 with mixing. Add phase D right before combining with water phase and mix well. |
| 3 | To the main vessel add the Water of phase E, start mixing, add the Disodium EDTA and then add the Xanthan Gum and heat this phase to 75°C. |
| 4 | When both phases are homogeneous and at their designated temperatures, slowly add oil phase ABCD to water phase E with prop mixing. |
| 5 | Homogenize combined phases for 3 minutes and resume prop mixing. |
| 6 | Start cooling and when batch is below 50°C add premix of phase F and then phase G with continued mixing. |
| 7 | Replace any water lost to evaporation and mix batch until smooth and at desired filling temperature. |
| Appearance | Off-White, thick lotion |
| Viscosity (Brk, RVDV-II, T-D, 20 rpm, after 24 h at room temperature; mPa·s) | 4300 - 7300 |
| pH | 6.0 - 7.0 |
*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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