This formulation was designed to provide broad spectrum (SPF/PFA ≤3) performance. HallBrite® ISO 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, protecting it from photodegradation, and so improve sunscreen performance. HallBrite® BHB aids wetting and dispersion of the Titanium Dioxide and contributes to UV filter solubility and enhanced product feel. This formulation was subjected to in vitro analysis and delivered SPF ~26, PFA (PPD) ~10 performance with critical wavelength 379 nm.
| Phase | INCI Name [INN/USAN] (Other Information) | Trade Name | % Wt | Function |
|---|---|---|---|---|
| A | Octyldodecyl Methoxycrylene | 私密內容: HALLBRITE® ISO* | 2.50 | Photostabilizer |
| Butyloctyl Salicylate | HALLBRITE® BHB* | 5.00 | Sunscreen Solvent / Emollient | |
| Homosalate [Homosalate] | 10.00 | UV Filter / Sunscreen Agent | ||
| Ethylhexyl Salicylate [Octisalate] | 5.00 | UV Filter / Sunscreen Agent | ||
| B | Titanium Dioxide [Titanium Dioxide], Aluminum Hydroxide (60 nm primary particle size) | 2.00 | UV Filter / Sunscreen Agent | |
| C | Cetearyl Alcohol | HALLSTAR® TA-1618 CETEARYL ALCOHOL | 0.50 | Emulsion Stabilizer |
| VP/Eicosene Copolymer | 1.00 | Film Former | ||
| Glyceryl Stearate | HALLSTAR® GMS PURE | 1.40 | Emulsifier | |
| PEG-100 Stearate | HALLSTAR® PEG 4400 MS | 1.20 | Emulsifier | |
| Potassium Cetyl Phosphate, Hydrogenated Palm Glycerides | 2.20 | Emulsifier | ||
| 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) | 0.20 | Thickener (Aqueous) | ||
| F | Preservative | a.n. | Preservative | |
| Glycerin | 3.00 | Humectant |
| 1 | To a secondary vessel add phase A, start mixing, slowly add phase B and begin heating phase AB to 85°C as phase B disperses. |
| 2 | When phase B is fully dispersed, add phase C ingredients to phase AB and when fully dispersed add phase D to phase ABC. |
| 3 | Add the water from phase E to the main vessel, dissolve Disodium EDTA and, with continued mixing, add Xanthan Gum. |
| 4 | When 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 | Homogenize combined phases for 3 minutes and then return to prop mixing, continuing to cool to room temperature. |
| 7 | Replace any water lost to evaporation, mix batch until smooth and perform quality assurance checks. |
| Appearance | Off-white cream |
| Viscosity (Brk, RVDV-II, T-D, 20 rpm, after 24 h at room temperature; mPa·s) | 3800 - 6300 |
| 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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