This formulation yields a broad spectrum (SPF/PFA <3) sunscreen cream. SolaStay® S1 is incorporated to mitigate the photocatalytic and reactive oxygen species generating activities of Titanium Dioxide and to rapidly and efficiently quench the excited states of Avobenzone. HallBrite® BHB aids wetting and dispersion of the Titanium Dioxide. Olivem® liquid crystal making emulsifiers provide a stable emulsion while imparting sensorial and physiological benefits. This product was subjected to in vitro analysis and delivered SPF ~32, PFA (PPD) ~15 performance with critical wavelength 379 nm.
| Phase | INCI Name [INN/USAN] (Other Information) | Trade Name | % Wt | Function |
|---|---|---|---|---|
| A | Ethylhexyl Methoxycrylene | SolaStay® S1* | 2.50 | Photostabilizer |
| Ethylhexyl Salicylate [Octisalate] | 5.00 | UV Filter / Sunscreen Agent | ||
| Butyloctyl Salicylate | HALLBRITE® BHB* | 5.00 | Sunscreen Solvent / Emollient | |
| C12-15 Alkyl Benzoate | 5.00 | Sunscreen Solvent / Emollient | ||
| Diethylamino Hydroxybenzoyl Hexyl Benzoate | 1.50 | UV Filter / Sunscreen Agent | ||
| B | Titanium Dioxide [Titanium Dioxide] | 2.00 | UV Filter / Sunscreen Agent | |
| C | VP/Eicosene Copolymer | 2.00 | 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 | Emulsifier / Liquid Crystal Maker | |
| D | Butyl Methoxydibenzoylmethane [Avobenzone] | 2.50 | UV Filter / Sunscreen Agent | |
| 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 | 3.00 | Humectant |
| 1 | To a secondary vessel add phase A and start mixing and heating. When phase A is a clear solution add phase B to it and continue heating. |
| 2 | When phase AB is at 85°C add phase C ingredients, in order, and when again homogeneous add phase D, dissolving it completely. |
| 3 | To the main vessel, add the water from phase E, dissolve the Disodium EDTA and, with continued mixing, disperse the Xanthan Gum. |
| 4 | When the Xanthan Gum is fully incorporated, start heating phase E to 80°C and add premix of phase F to phase E. |
| 5 | When both phases are homogeneous and at their designated temperatures, slowly add oil phase ABCD to water phase EF with prop mixing. |
| 6 | After 2 minutes prop mixing batch, homogenize for 3 minutes, resume prop mixing and begin cooling batch. |
| 7 | Cool batch to room temperature, replace any water lost to evaporation, mix until smooth and perform quality assurance checks. |
| Appearance | Off-white to pale yellow cream |
| Viscosity (Brk, RVDV-II, T-D, 20 rpm, after 24 h at room temperature; mPa·s) | 7500 - 12500 |
| 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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