This oil-in-water sunscreen lotion formulation is designed around Hallstar’s HallBrite® EZ-FLO ZDX Plus non-nano zinc oxide dispersion and organic UVB filters, to provide broad spectrum SPF 50 performance for the US market (SPF 30 in many other regions). In vitro analysis indicates SPF ~ 52, PFA (PPD) ~11 performance with critical wavelength 378 nm.
| Phase | INCI Name [INN/USAN] (Other Information) | Trade Name | % Wt | Function |
|---|---|---|---|---|
| A | Ethylhexyl Methoxycinnamate [Octinoxate] | 7.50 | UV Filter / Sunscreen Agent | |
| Ethylhexyl Salicylate [Octisalate] | 5.00 | UV Filter / Sunscreen Agent | ||
| Zinc Oxide [Zinc Oxide] (58%), Butyloctyl Salicylate, Ethylhexyl Methoxycrylene, Triceteareth-4 Phosphate, Triethoxycaprylylsilane | HALLBRITE® EZ-FLO ZDX PLUS | 20.00 | UV Filter/Sunscreen Agent / Carrier System | |
| B | VP/Eicosene Copolymer | 2.00 | Film Former | |
| Glyceryl Stearate | HALLSTAR® GMS PURE | 2.50 | Emulsifier | |
| PEG-100 Stearate | HALLSTAR® PEG 4400 MS | 3.00 | Co-emulsifier | |
| C | Water (Aqua) (deionized) | up to 100 | Volatile Carrier | |
| Glycerin | 3.00 | Humectant | ||
| C | Disodium EDTA | 0.05 | Chelating Agent | |
| Xanthan Gum (pharma grade) | 0.25 | Thickener (Aqueous) | ||
| E | Styrene/Acrylates Copolymer (hollow spherical, 325 nm) | 3.00 | SPF Booster | |
| F | Preservative | a.n. | Preservative | |
| Cylcopentasiloxane, Cyclohexasiloxane | 3.00 | Emollient | ||
| Silica (spherical, 12 µm) | 2.00 | Deoiling Agent |
| 1 | To a secondary vessel add phase A and start mixing, heat to 80°C, and then add phase B. |
| 2 | To the main vessel add phase C, start mixing and add phase D items in order. |
| 3 | When solids of phase D are fully incorporated, heat phase CD to 75°C. |
| 4 | When both phases are homogeneous and at their designated temperatures, slowly add phase AB to phase CD with prop mixing. |
| 5 | Add phase E with mixing and after 5 minutes start cooling batch, When batch is below 50°C add phase F items one by one with mixing. |
| 6 | Continue mixing until batch is at room temperature, replacing any water lost to evaporation and mixing until smooth. |
| Appearance (25°C) | Off-white lotion |
| Viscosity (Brk, DVII, T-D, 20 rpm, after 24 h at room temperature; mPa∙s) | 6000 - 9000 |
| pH (as is) | 6.5 - 7.5 |
*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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