This oil in water formulation was designed to provide broad spectrum (SPF/PFA<3) label SPF 50 performance. SolaStay® S1 (Ethylhexyl Methoxycrylene) in HallBrite® EZ-FLO TDX Plus provides very rapid and efficient excited state quenching of Avobenzone, protecting it from photodegradation, and also mitigates the photocatalytic and reactive oxygen species generating activities of the oxide to improve sunscreen performance. This formulation was subjected to in vitro analysis and delivered SPF ~50 (50), PFA (PPD) ~19 performance with critical wavelength 381 nm.
| Phase | INCI Name [INN/USAN] (Other Information) | Trade Name | % Wt | Function |
|---|---|---|---|---|
| A | Homosalate [Homosalate] | 10.00 | UV Filter / Sunscreen Agent | |
| Ethylhexyl Salicylate [Octisalate] | 5.00 | UV Filter / Sunscreen Agent | ||
| B | Butyloctyl Salicylate, Titanium Dioxide (nano) [Titanium Dioxide] (40%), Triceteareth-4 Phosphate, Dimethicone Crosspolymer, Silica | HALLBRITE® EZ-FLO TDX | 4.00 | UV Filter/Sunscreen Agent / Photostabilizer / Carrier System |
| Butyloctyl Salicylate, Titanium Dioxide (nano) [Titanium Dioxide] (23%), C12-15 Alkyl Benzoate, Ethylhexyl Methoxycrylene, Triceteareth-4 Phosphate, Dimethicone Crosspolymer, Silica | HALLBRITE® EZ-FLO TDX PLUS* | 11.00 | UV Filter/Sunscreen Agent / Photostabilizer / Carrier System | |
| C | VP/Hexadecene Copolymer | 1.00 | Film Former | |
| PEG-8 Stearate, Glyceryl Stearate, Cetearyl Alcohol, Sorbitan Oleate | OLIVEM® LV FLEX | 1.80 | Self-Emulsifier / Liquid Crystal Maker | |
| D | Butyl Methoxydibenzoylmethane [Avobenzone] | 3.00 | UV Filter / Sunscreen Agent | |
| E | Water (Aqua) (deionized) | up to 100 | Volatile Carrier | |
| Butylene Glycol | 3.00 | Humectant | ||
| Disodium EDTA | 0.05 | Chelating Agent | ||
| Acrylates/C10-30 Alkyl Acrylate Crosspolymer | 0.15 | Thickener (Aqueous) | ||
| F | Potassium Hydroxide | 0.75 | pH Adjuster | |
| Preservative | a.n. | Preservative | ||
| Cyclopentasiloxane | 3.00 | Emollient | ||
| Aluminum Starch Octenylsuccinate | 2.00 | Deoiling Agent |
PREPARATIVE PROCEDURE
| 1 | To a secondary vessel add phase A, start mixing, add phase B to phase A, and heat phase AB to 70°C. |
| 2 | Add phase C ingredients to phase AB with continued mixing, then, add phase D to phase ABC and mix until completely dissolved. |
| 3 | Add liquids from phase E to main vessel, dissolve Disodium EDTA, then add Xanthan Gum and mix until fully incorporated. |
| 4 | Start heating phase E to 70°C. |
| 5 | With both phases are homogeneous and at temperature, add oil phase ABCD to water phase E with mixing. |
| 6 | After mixing for five minutes, start cooling and homogenize until batch reaches 55°C (or 3 minutes), then return to prop mixing with continued cooling. |
| 7 | At 45°C or lower, add phase F one by one. |
| 8 | Replace any water lost to evaporation and mix batch until smooth. |
PRODUCT CHARACTERISTICS (25°C)
| Appearance | Off-White Lotion |
| Viscosity (Brk, RVDV-II, T-D, 20 rpm, after 24 h at room temperature; mPa∙s) | 3000 - 4500 |
| 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
The Hallstar Company - 120 South Riverside Plaza Suite 1620 - Chicago, IL 60606-3911 USA hallstarbeauty.com