This formulation was designed to provide SPF 30 performance with only 20% HallBrite® EZ-FLO TDX dispersion. HallBrite® BHB (Butyloctyl Salicylate in the dispersion aids wetting and dispersion of the Titanium Dioxide and enhanced product feel. This composition was subjected to in vitro analysis and delivered SPF ~35, PFA (PPD) ~6 performance with critical wavelength 372 nm. One person in vivo testing yielded static SPF 34.6 in support of in vitro results.
| Phase | INCI Name [INN/USAN] (Other Information) | Trade Name | % Wt | Function |
|---|---|---|---|---|
| A | C12-15 Alkyl Benzoate | 5.00 | Solvent | |
| Butyloctyl Salicylate, Titanium Dioxide (nano) [Titanium Dioxide] (40%), Triceteareth-4 Phosphate, Dimethicone Crosspolymer, Silica | HALLBRITE® EZ-FLO TDX | 20.00 | UV Filter/Sunscreen Agent / Photostabilizer / Carrier System | |
| B | Cetearyl Alcohol | HALLSTAR® TA-1618 CETEARYL ALCOHOL | 0.50 | Thickener (Nonaqueous) |
| VP/Eicosene Copolymer | 1.00 | Film Former | ||
| Glyceryl Stearate | HALLSTAR® GMS PURE | 1.35 | Emulsifier | |
| PEG-100 Stearate | HALLSTAR® PEG 4400 MS | 1.00 | Co-emulsifier | |
| Potassium Cetyl Phosphate, Hydrogenated Palm Glycerides | 2.00 | Emulsifier | ||
| C | Water (Aqua) (deionized) | up to 100 | Volatile Carrier | |
| Glycerin | 3.00 | Humectant | ||
| Disodium EDTA | 0.05 | Chelating Agent | ||
| Xanthan Gum (pharma grade) | 0.25 | Thickener (Aqueous) | ||
| D | Preservative | a.n. | Preservative | |
| Aluminum Starch Octenylsuccinate | 2.00 | Deoiling Agent | ||
| Cyclopentasiloxane | 2.00 | Emollient | ||
| E | Acrylamide/Sodium Acryloyldimethyltaurate Copolymer, Isohexadecane, Polysorbate 80 | 2.00 | Thickener (Aqueous) |
| 1 | In secondary vessel add phase A, start mixing. |
| 2 | Heat A to 85°C and then, add phase B with mixing. |
| 3 | Add water and Glycerin of phase C to the main vessel, dissolve EDTA with mixing and then add Xanthan Gum, stirring until fully incorporated. |
| 4 | Heat phase C to 80°C. |
| 5 | When both phases are homogenous and at their designated temperatures, slowly add Oil phase (AB) to the water phase (C) with prop mixing. |
| 6 | Start homogenizing for 3 mins. Resume prop mixing, and start cooling down until room temperature. |
| 7 | One by one add phase D when batch < 40°C with mixing. Add phase E if batch is too thin. |
| 8 | Replace any water lost to evaporation, and mix until smooth. |
| Appearance | White cream |
| Viscosity (Brk, RVDV-II, T-D, 20 rpm, after 24 h at room temperature; mPa∙s) | 23000 - 38000 |
| pH | 5.5 - 6.5 |
*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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