A broad spectrum SPF 50 sunscreen lotion using ony mineral UV filters. SolaStay® S1 is incorporated to mitigate the photocatalytic and reactive oxygen species generating activities of the oxides. The various oils and HallBrite® BHB contribute to its favorable esthetics. The formula was subjected to in vitro analysis and delivered SPF ~55, PFA (PPD) ~23 performance with critical wavelength 379 nm.
| Phase | INCI Name [INN/USAN] (Other Information) | Trade Name | % Wt | Function |
|---|---|---|---|---|
| A | Ethylhexyl Palmitate | HALLSTAR® OP | 10.00 | Emollient |
| Aloe Barbadensis Leaf Extract, Canola Oil | BIOCHEMICA® BIOVERA ALOE OIL | 1.00 | Emollient | |
| Butyrospermum Parkii (Shea) Butter | BIOCHEMICA® SHEA BUTTER NATURAL | 0.50 | Emollient | |
| Dimethicone (200 cSt) | 8.00 | Emollient | ||
| Butyloctyl Salicylate | HALLBRITE® BHB* | 5.00 | Emollient | |
| Ethylhexyl Methoxycrylene | SolaStay® S1* | 2.00 | Photostabilizer | |
| B | Titanium Dioxide [Titanium Dioxide], Aluminum Hydroxide (60 nm primary particle size) | 3.20 | UV Filter / Sunscreen Agent | |
| Zinc Oxide [Zinc Oxide], Triethoxycaprylylsilane (30-200 nm primary particle size) | 8.00 | UV Filter / Sunscreen Agent | ||
| C | Cetyl PEG/PPG-10/1 Dimethicone | 4.00 | Emulsifier | |
| Sorbitan Olivate | Olivem® 900 | 2.00 | Co-emulsifier | |
| D | Water (Aqua) (deionized) | up to 100 | Volatile Carrier | |
| Disodium EDTA | 0.05 | Chelating Agent | ||
| Xanthan Gum (pharma grade) | 0.25 | Thickener (Aqueous) | ||
| E | Preservative | a.n. | Preservative | |
| Glycerin | 3.00 | Humectant | ||
| F | Aluminum Starch Octenylsuccinate | 2.00 | Deoiling Agent |
PREPARATIVE PROCEDURE
| 1 | To the main vessel add phase A and start mixing, disperse phase B and then heat to 80°C. |
| 2 | Add phase C to phase AB, mix well until all are dissolved and then homogenize for 3 minutes. |
| 3 | To a secondary vessel add the Water of phase D, start mixing, add the Disodium EDTA and then add Xanthan Gum, stirring until fully incorporated. Start heating to 75°C. |
| 4 | When both phases are homogeneous and at their designated temperatures, slowly add the water phase D to the oil phase ABC with gentle homogenization. Start cooling. When < 50°C, add premixed phase E and then add phase F. |
| 5 | Continue mixing until batch is at room temperature, replace any water lost to evaporation and mix until smooth. |
PRODUCT CHARACTERISTICS (25°C)
| Appearance | Off-white cream |
| Viscosity (Brk, RVDV-II, T-D, 20 rpm, after 24 h at room temperature; mPa∙s) | 12500 - 22000 |
*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
The Hallstar Company - 120 South Riverside Plaza Suite 1620 - Chicago, IL 60606-3911 USA hallstarbeauty.com