This U.S.-focused sunscreen lotion formulation was designed to provide broad spectrum (SPF/PFA ≤ 3) SPF 50 performance. SolaStay® S1 and SolaStay® P1 provide very rapid quenching of the excited states of Avobenzone, protecting it from photodegradation and so improving sunscreen performance. Olivem® 1000 and Olivem® VS Feel constitute the elegant base upon which a stable emulsion with sensorial and physiological benefits was delivered. Sensolene®, HallBrite® BHB and HallTress® DIBA Special contribute to UV filter solubility and enhance product spreadability and feel. This formulation was subjected to in vitro analysis and delivered SPF ~52, PFA (PPD) ~21 performance with critical wavelength 377 nm.
| Phase | INCI Name [INN/USAN] (Other Information) | Trade Name | % Wt | Function |
|---|---|---|---|---|
| A | Ethylhexyl Methoxycrylene | SolaStay® S1* | 2.00 | Photostabilizer |
| Polyester-25 | SolaStay® P1* | 4.00 | Photostabilizer | |
| Butyloctyl Salicylate | HALLBRITE® BHB* | 5.00 | Sunscreen Solvent / Emollient | |
| Ethylhexyl Salicylate [Octisalate] | 5.00 | UV Filter / Sunscreen Agent | ||
| Homosalate [Homosalate] | 15.00 | UV Filter / Sunscreen Agent | ||
| Diisobutyl Adipate | HALLTRESS® DIBA SPECIAL | 4.00 | Sunscreen Solvent | |
| Ethylhexyl Olivate | SENSOLENE® | 2.00 | Multifunctional Lipid | |
| B | Butyl Methoxydibenzoylmethane [Avobenzone] | 3.00 | UV Filter / Sunscreen Agent | |
| Benzophenone-3 [Oxybenzone] | 6.00 | UV Filter / Sunscreen Agent | ||
| C | VP/Eicosene Copolymer | 1.00 | Film Former | |
| Cetearyl Olivate, Sorbitan Olivate | OLIVEM® 1000 | 3.00 | Self-Emulsifier / Liquid Crystal Maker | |
| Cetearyl Alcohol, Cetyl Palmitate, Sorbitan Palmitate, Sorbitan Oleate | OLIVEM® VS FEEL | 2.00 | Co-emulsifier / Liquid Crystal Maker | |
| D | Water (Aqua) (deionized) | up to 100 | Volatile Carrier | |
| Disodium EDTA | 0.05 | Chelating Agent | ||
| Xanthan Gum (pharma grade) | 0.20 | Thickener (Aqueous) | ||
| E | Preservative | a.n. | Preservative | |
| Glycerin | 4.00 | Humectant |
| 1 | In a secondary vessel combine phase A and starting mixing. Slowly add phase B ingredients individually with continued mixing. |
| 2 | Heat this oil phase AB to 85°C and then add phase C ingredients individually with continued mixing. |
| 3 | Add water of phase D to the main vessel, dissolve the Disodium EDTA and, with continued mixing, add Xanthan Gum, mixing until fully incorporated. |
| 4 | Start heating this water phase D to 80°C and add premixed phase E with mixing. |
| 5 | When both phases are homogeneous and at their designated temperatures, slowly add oil phase ABC to water phase DE with prop mixing. |
| 6 | Homogenize combined phases for 3 minutes and then resume prop mixing and start cooling to the room temperature. |
| 7 | When batch is at room temperature, replace any water lost to evaporation and mix until smooth. |
| Appearance | Pale yellow lotion |
| Viscosity (Brk, RVDV-II, T-D, 20 rpm, after 24 h at room temperature; mPa·s) | 4500 - 7500 |
| pH | 4.5 - 5.5 |
*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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