This sunscreen lotion formulation is designed to provide U.S. broad spectrum (critical wavelength ≥ 370 nm) performance. HallBrite® BHB aids wetting and dispersion of the Titanium Dioxide and contributes to enhanced product feel. HallTress® DIBA Special and HallBrite® BHB contribute to UV filter solubility. This formulation was subjected to in vitro analysis and delivered SPF ~40, PFA (PPD) ~8 performance with critical wavelength 373 nm.
| Phase | INCI Name [INN/USAN] (Other Information) | Trade Name | % Wt | Function |
|---|---|---|---|---|
| A | Ethylhexyl Methoxycinnamate [Octinoxate] | 4.00 | UV Filter / Sunscreen Agent | |
| Dicaprylyl Carbonate | 5.00 | Sunscreen Solvent | ||
| Butyloctyl Salicylate | HALLBRITE® BHB* | 6.00 | Sunscreen Solvent / Emollient | |
| Diisobutyl Adipate | HALLTRESS® DIBA SPECIAL | 5.00 | Sunscreen Solvent / Emollient | |
| B | Benzophenone-3 [Oxybenzone] | 4.00 | UV Filter / Sunscreen Agent | |
| Titanium Dioxide [Titanium Dioxide], Aluminum Hydroxide (60 nm primary particle size) | 4.20 | UV Filter / Sunscreen Agent | ||
| C | VP/Eicosene Copolymer | 1.00 | Film Former | |
| Cetearyl Alcohol | HALLSTAR® TA-1618 CETEARYL ALCOHOL | 0.50 | Emulsion Stabilizer | |
| Glyceryl Stearate | HALLSTAR® GMS PURE | 2.00 | Emulsifier | |
| PEG-100 Stearate | HALLSTAR® PEG 4400 MS | 2.00 | Emulsifier | |
| Potassium Cetyl Phosphate, Hydrogenated Palm Glycerides | 2.00 | Emulsifier | ||
| D | Water (Aqua) (deionized) | up to 100 | Volatile Carrier | |
| Disodium EDTA | 0.05 | Chelating Agent | ||
| Xanthan Gum (pharma grade) | 0.30 | Thickener (Aqueous) | ||
| E | Preservative | a.n. | Preservative | |
| Glycerin | 3.00 | Humectant | ||
| F | Silica (spherical, 12 µm) | 2.00 | Deoiling Agent |
| 1 | In secondary vessel combine phase A and start mixing. Slowly add phase B individually with continued mixing. |
| 2 | Heat this oil phase AB to 80°C and then add phase C ingredients individually with mixing. |
| 3 | Add water of phase D into main vessel, dissolve Disodium EDTA with continue mixing, and then add Xanthan Gum, stirring until fully incorporated. |
| 4 | Start heating this water phase D to 75°C and add premixed phase E with mixing. |
| 5 | When both phases are homogeneous and at their designated temperatures, slowly add phase ABC to phase DE with prop mixing. |
| 6 | Homogenize combined phases for 3 minutes, resume prop mixing, start cooling and when batch is below 50°C add phase F, mixing well. |
| 7 | Continue mixing until batch is at room temperature. Replace any water lost to evaporation, and mix until smooth. |
| Appearance | White lotion |
| Viscosity (Brk, RVDV-II, Sp 4, 20 rpm, after 24 h at room temperature; mPa∙s) | 2500 - 5500 |
| 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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