This mineral UV filters only, oil-in-water broad spectrum sunscreen lotion uses SolaStay® S1 to mitigate the photocatalytic and reactive oxygen species generating activities of the oxides. It was subjected to in vitro analysis and delivered SPF ~71, PFA (PPD) ~23 performance with critical wavelength 379 nm.
| Phase | INCI Name [INN/USAN] (Other Information) | Trade Name | % Wt | Function |
|---|---|---|---|---|
| A | Ethylhexyl Isononanoate | HallStar® Octyl Isononanoate | 10.00 | Emollient |
Butyrospermum Parkii (Shea) Butter | Biochemica® Shea Butter Refined | 1.00 | Emollient | |
Ethylhexyl Methoxycrylene | SolaStay® S1* | 3.00 | Photostabilizer | |
| 10.00 | UV Filter/Sunscreen Agent / Carrier System | |||
| B | VP/Eicosene Copolymer | 2.00 | Film Former / Water Resistance Enhancer | |
Glyceryl Stearate | HallStar® GMS Pure | 3.00 | Emulsifier | |
PEG-100 Stearate | HallStar® PEG 4400 MS MB | 2.80 | ||
| C | Styrene/Acrylates Copolymer (hollow spherical, 325 nm) | 2.00 | SPF Booster | |
| D | Water (Aqua) | up to 100 | Volatile Carrier | |
| Glycerin | 3.00 | Humectant | ||
| E | Disodium EDTA | 0.05 | Chelating Agent | |
| Xanthan Gum (pharma grade) | 0.25 | Thickener (Aqueous) / Emulsion Stabilizer | ||
| F | Zinc Oxide [Zinc Oxide], Silica (10-30 nm primary particle size) | 16.00 | UV Filter / Sunscreen Agent | |
| G | Preservative | a.n. | Preservative | |
| Cyclopentasiloxane, Cyclohexasiloxane | 5.00 | Feel Modification / Enhancement | ||
| Aluminum Starch Octenylsuccinate | 2.00 | Deoiling Agent |
PREPARATIVE PROCEDURE
| 1 | To a secondary vessel add phase A, start mixing, heat to 80°C and then add phase B. |
| 2 | To the main vessel add phase D, start mixing and then add phase E items in order. |
| 3 | When phase E has been fully incorporated, heat phase DE to 75°C and then slowly add phase F. |
| 4 | When both phases are homogeneous and at their designated temperatures, add phase C to phase AB and mix until uniform. |
| 5 | Slowly add phase ABC to phase DEF with strong mixing. |
| 6 | Homogenize for 3 minutes, start cooling and when batch is below 50°C add phase G items one by one with mixing. |
| 7 | Continue mixing until batch is at room temperature, replacing any water lost to evaporation and mixing until smooth. |
PRODUCT CHARACTERISTICS (25°C)
| Appearance | Off-white lotion |
| Viscosity (Brk, DVII, T-D, 20 rpm, after 24 h at room temperature; mPa∙s) | 7000 - 11000 |
| pH (as is) | 6 - 8 |
*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