This oil-in-water sunscreen lotion provides broad spectrum sun protection. SolaStay® S1 (Ethylhexyl Methoxycrylene) mitigates the photocatalytic and reactive oxygen species-generating activities of titanium dioxide and extremely rapidly and efficiently quench the excited states of Avobenzone, protecting it from photodegradation and so improve sunscreen performance.
This formula was subjected to in vitro analysis and delivered SPF ~ 35, PFA (PPD) ~ 13 performance with critical wavelength 379 nm.
| Phase | INCI Name [INN/USAN] (Other Information) | Trade Name | % Wt | Function |
|---|---|---|---|---|
| A | Ethylhexyl Methoxycinnamate [Octinoxate] | 3.00 | UV Filter / Sunscreen Agent | |
| Ethylhexyl Salicylate [Octisalate] | 5.00 | UV Filter / Sunscreen Agent | ||
| Ethylhexyl Methoxycrylene | SolaStay® S1* | 3.00 | Photostabilizer | |
| B | Butyloctyl Salicylate, Titanium Dioxide (nano) [Titanium Dioxide] (40%), Triceteareth-4 Phosphate, Dimethicone Crosspolymer, Silica | HALLBRITE® EZ-FLO TDX | 10.00 | UV Filter/Sunscreen Agent / Carrier System |
| C | VP/Eicosene Copolymer | 1.00 | Film Former / Water Resistance Enhancer | |
| Cetearyl Olivate, Sorbitan Olivate | Olivem ® 1000 | 4.00 | Self-Emulsifier / Liquid Crystal Maker | |
| Ceteareth-6 Olivate | OLIVEM® 800 | 3.00 | Co-emulsifier | |
| D | Butyl Methoxydibenzoylmethane [Avobenzone] | 3.00 | UV Filter / Sunscreen Agent | |
| E | Water (Aqua) (deionized) | up to 100 | Volatile Carrier | |
| Glycerin | 3.00 | Humectant | ||
| F | Tetrasodium EDTA | 0.02 | Chelating Agent | |
| Xanthan Gum (pharma grade) | 0.30 | Thickener (Aqueous) | ||
| G | Preservative | a.n. | Preservative | |
| Cyclopentasiloxane | 4.00 | Feel Modification / Enhancement | ||
| Aluminum Starch Octenylsuccinate | 1.50 | Deoiling Agent |
PREPARATIVE PROCEDURE
| 1 | To a secondary vessel add phase A, start mixing and slowly add phase B components individually to phase A with continued mixing. |
| 2 | Heat phase AB to 85°C and then add phase C ingredients with mixing. Add phase D to phase ABC and mix until phase D is fully dissolved. |
| 3 | To the main vessel add phase E, start mixing, then add items of phase F in order and heat this phase to 80°C. |
| 4 | When both phases ABCD and EF are homogeneous and at designated temperatures, slowly add phase ABCD to phase EF with mixing. |
| 5 | Start homogenizing for 3 minutes and start cooling. When the batch is below 50°C, add phase G items one by one with mixing. |
| 6 | When the batch is uniform add deionized water to correct for evaporative losses. Continue mixing until smooth. |
PRODUCT CHARACTERISTICS (25°C)
| Appearance (25°C) | Off-white to pale yellow cream |
| Viscosity (20 rpm, Brk, RV DV-II, T-D, after 24h at room temperature; mPa∙s) | 17000 - 28000 |
| pH | 5 - 6 |
*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