This light, non-greasy anti-sand sunscreen gel delivers a hassle-free sun protection experience. It can be applied to wet skin without any whitening effect, and its dry finish allows sand to be easily brushed off. SolaStay® S1 provides very rapid and efficient quenching of excited-state Avobenzone, protecting the UV filter from photo-degradation and thus improving sunscreen performance. In addition, the HallBrite® BHB in SolaStay® S1 provides sunscreen solvency and emolliency. In vitro testing suggests SPF ~40, PFA (PPD) ~16 performance with critical wavelength = 378 nm. Water resistance surpassed 4 hours when tested in house via in vitro method.
| Phase | INCI Name [INN/USAN] (Other Information) | Trade Name | % Wt | Function |
|---|---|---|---|---|
| A | Ethylhexyl Salicylate [Octisalate] | 5.00 | UV Filter / Sunscreen Agent | |
| Octocrylene [Octocrilene] | 10.00 | UV Filter / Sunscreen Agent | ||
| Homosalate [Homosalate] | 10.00 | UV Filter / Sunscreen Agent | ||
| Ethylhexyl Methoxycrylene | SolaStay® S1* | 3.00 | Photostabilizer | |
| Butyloctyl Salicylate | HallBrite® BHB* | 5.00 | Sunscreen Solvent | |
| B | Butyl Methoxydibenzoylmethane [Avobenzone] | 3.00 | UV Filter / Sunscreen Agent | |
| C | Ethylhexyl Olivate, Sodium Acrylates Copolymer, Polyglyceryl-4 Olivate | Olivem® 2020 | 2.00 | Multifunctional Cold Emulsifier |
| Acrylates/Dimethicone Copolymer | 1.00 | Film Former | ||
| D | Water (Aqua) | up to 100 | Volatile Carrier | |
| Glycerin | 8.00 | Humectant | ||
| Caprylyl Glycol, Phenoxyethanol, Hexylene Glycol | 1.00 | Preservative | ||
| Disodium EDTA | 0.05 | Chelating Agent | ||
| E | Silica (spherical, 12 µm) | 5.00 | Deoiling Agent | |
| Cyclopentasiloxane, Cyclohexasiloxane | 5.00 | Feel Modification / Enhancement |
PREPARATIVE PROCEDURE
| 1 | To a secondary vessel add phase A and start mixing and add phase B. Heat to 45 - 50°C. Start cooling after phase B is dissolved totally. |
| 2 | Add phase C into phase AB and mix until uniform. |
| 3 | To the main vessel add liquids from phase D, start mixing and add Disodium EDTA with mixing until dissolved. |
| 4 | When both phases are homogeneous, slowly add phase ABC to phase D with proper mixing until the emulsion is fully formed. |
| 5 | Add phase E with mixing until batch is uniform, replacing any water lost to evaporation and mixing until smooth. |
PRODUCT CHARACTERISTICS (25°C)
| Appearance | Off-white gel |
| Viscosity (Brk, DVII, T-D, 20 rpm, after 24 h at room temperature; mPa∙s) | 45000 - 70000 |
| pH (as is) | 5.5 - 6.5 |
*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