This formulation uses only mineral UV filters in a water-broad spectrum sunscreen cream and employs SolaStay® S1 to mitigate the photocatalytic and reactive oxygen species-generating activities of the oxides. It was subjected to in vitro analysis and delivered SPF ~60, PFA (PPD) ~24 performance with critical wavelength 380 nm.
| Phase | INCI Name [INN/USAN] (Other Information) | Trade Name | % Wt | Function |
|---|---|---|---|---|
| A | Ethylhexyl Isononanoate | HallStar® Octyl Isononanoate | 10.00 | Emollient |
Butyrospermum Parkii (Shea) Butter | Biochemica® Shea Butter Refined | 1.00 | Emollient | |
Ethylhexyl Methoxycrylene | SolaStay® S1* | 2.00 | Photostabilizer | |
| 10.00 | UV Filter/Sunscreen Agent / Carrier System | |||
| B | VP/Eicosene Copolymer | 2.00 | Film Former / Water Resistance Enhancer | |
Glyceryl Stearate | HallStar® GMS Pure | 3.00 | Emulsifier | |
PEG-100 Stearate | HallStar® PEG 4400 MS MB | 2.80 | ||
| C | Zinc Oxide [Zinc Oxide], Silica (10-30 nm primary particle size) | 12.00 | UV Filter / Sunscreen Agent | |
| D | Styrene/Acrylates Copolymer (hollow spherical, 325 nm) | 3.00 | SPF Booster | |
| E | Water (Aqua) | up to 100 | Volatile Carrier | |
| Glycerin | 3.00 | Humectant | ||
| Disodium EDTA | 0.05 | Chelating Agent | ||
| Xanthan Gum (pharma grade) | 0.25 | Thickener (Aqueous) / Emulsion Stabilizer | ||
| F | Preservative | a.n. | Preservative | |
| Cyclopentasiloxane, Cyclohexasiloxane | 5.00 | Emollient | ||
| Aluminum Starch Octenylsuccinate | 2.00 | Deoiling Agent |
PREPARATIVE PROCEDURE
| 1 | To a secondary vessel add phase A, start mixing, heat to 80°C, add phase B and then add phase C. |
| 2 | To the main vessel add the Water and Glycerin of phase E, start mixing and add remaining phase items in order. |
| 3 | When solids of phase E are fully incorporated, heat phase E to 75°C. |
| 4 | When both phases are homogeneous and at their designated temperatures, add phase D to phase ABC and mix until uniform. |
| 5 | Slowly add phase ABCD to phase E with strong mixing. |
| 6 | Homogenize for 3 minutes , start cooling and when batch is below 50°C add phase F items one by one with mixing. |
| 7 | Continue mixing until batch is at room temperature, replacing any water lost to evaporation and stop mixing when smooth. |
PRODUCT CHARACTERISTICS (25°C)
| Appearance | White smooth lotion |
| Viscosity (Brk, DVII, T-D, 20 rpm, after 24h at room temperature; mPa∙s) | 10000 - 15000 |
| pH (as is) | 6 - 7 |
*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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