This formulation was designed to US use. HallBrite® ISO is incorporated to mitigate the photocatalytic and reactive oxygen species generating activities of Titanium Dioxide , 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 ~35, PFA (PPD) ~5 performance with critical wavelength 373 nm.
Phase | INCI Name [INN/USAN] (Other Information) | Trade Name | % Wt | Function |
---|---|---|---|---|
A | Octyldodecyl Methoxycrylene | 私密內容: HALLBRITE® ISO* | 3.00 | Photostabilizer |
Butyloctyl Salicylate | HALLBRITE® BHB* | 5.00 | Emollient | |
Butyrospermum Parkii (Shea) Butter | BIOCHEMICA® SHEA BUTTER REFINED | 0.50 | Emollient | |
Ethylhexyl Methoxycinnamate [Octinoxate] | 4.50 | UV Filter / Sunscreen Agent | ||
B | Titanium Dioxide [Titanium Dioxide], Aluminum Hydroxide (60 nm primary particle size) | 3.10 | UV Filter / Sunscreen Agent | |
C | VP/Eicosene Copolymer | 1.00 | Film Former | |
Glyceryl Stearate | HALLSTAR® GMS PURE | 2.00 | Emulsifier | |
PEG-100 Stearate | HALLSTAR® PEG 4400 MS | 2.80 | Emulsifier | |
D | Water (Aqua) (deionized) | up to 100 | Volatile Carrier | |
Disodium EDTA | 0.05 | Chelating Agent | ||
Xanthan Gum (pharma grade) | 0.15 | Thickener (Aqueous) | ||
E | Preservative | a.n. | Preservative | |
Glycerin | 3.00 | Humectant | ||
F | Acrylamide/Sodium Acryloyldimethyltaurate Copolymer, Isohexadecane, Polysorbate 80 | 2.00 | Thickener (Aqueous) / Emulsion Stabilizer |
1 | To a secondary vessel add phase A, start mixing and slowly add phase B to phase A with continued mixing. |
2 | Heat phase AB to 80°C and then add phase C ingredients in order with mixing. |
3 | To the main vessel add Water of phase D with mixing, add Disodium EDTA, then add Xanthan Gum, and heat this phase to 75°C. |
4 | When both phases are homogeneous at their designated temperatures, slowly add phase ABC to phase D withmixing. |
5 | Homogenize for 3 minutes and resume prop mixing. |
6 | Start cooling and when below 50°C, slowly add previously prepared phase E dispersion, and then add phase F with mixing. |
7 | Replace any water lost to evaporation and mix batch until smooth and at desired filling temperature. |
Appearance | Off white Cream |
Viscosity (Brk, RVDV-II, T-D, 20 rpm, after 24 h at room temperature; mPa∙s) | 24500 - 40500 |
pH | 6.0-7.0 |
*Patented and Patent Pending
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