This sunscreen lotion was designed to provide broad spectrum (SPF/PFA ≤3) performance. SolaStay® S1 is incorporated to rapidly and efficiently quench the excited states of Avobenzone, protecting it from photodegradation and so improving sunscreen performance. HallBrite® BHB contributes to UV filter solubility and enhanced product feel. This formulation was subjected to in vitro analysis and delivered SPF ~32, PFA (PPD) ~14 performance with critical wavelength 378 nm.
| Phase | INCI Name [INN/USAN] (Other Information) | Trade Name | % Wt | Function |
|---|---|---|---|---|
| A | Ethylhexyl Methoxycrylene | SolaStay® S1* | 2.00 | Photostabilizer |
| Homosalate [Homosalate] | 10.00 | UV Filter / Sunscreen Agent | ||
| Ethylhexyl Salicylate [Octisalate] | 5.00 | UV Filter / Sunscreen Agent | ||
| Butyloctyl Salicylate | HALLBRITE® BHB* | 3.00 | Sunscreen Solvent / Emollient | |
| C12-15 Alkyl Benzoate | 5.00 | Sunscreen Solvent | ||
| B | Butyl Methoxydibenzoylmethane [Avobenzone] | 3.00 | UV Filter / Sunscreen Agent | |
| Benzophenone-3 [Oxybenzone] | 4.00 | UV Filter / Sunscreen Agent | ||
| C | VP/Eicosene Copolymer | 2.00 | Film Former | |
| Glyceryl Stearate | HALLSTAR® GMS PURE | 1.70 | Emulsifier | |
| PEG-100 Stearate | HALLSTAR® PEG 4400 MS | 1.60 | Emulsifier | |
| Potassium Cetyl Phosphate, Hydrogenated Palm Glycerides | 1.40 | Emulsifier | ||
| D | Styrene/Acrylates Copolymer (hollow spherical, 325 nm) | 1.00 | SPF Booster | |
| E | Water (Aqua) (deionized) | up to 100 | Volatile Carrier | |
| Tetrasodium EDTA | 0.03 | Chelating Agent | ||
| Xanthan Gum (pharma grade) | 0.35 | Thickener (Aqueous) | ||
| F | Caprylyl Glycol, Phenoxyethanol, Hexylene Glycol | a.n. | Preservative | |
| Butylene Glycol | 3.00 | Humectant | ||
| G | Cyclopentasiloxane | 2.00 | Feel Modification / Enhancement | |
| Silica (spherical, 12 µm) | 2.00 | Feel Modification / Enhancement |
| 1 | To a secondary vessel add phase A, start mixing, add phase B ingredients, heat to 80°C and then add phase C ingredients, in order. |
| 2 | When phase ABC is homogeneous, add phase D with continued mixing to ensure phase D is well dispersed. |
| 3 | To the main vessel, add the water from phase E, dissolve Tetrasodium EDTA and, with continued mixing, add Xanthan Gum. |
| 4 | When Xanthan Gum is fully incorporated heat phase E to 80°C. |
| 5 | When both phases are homogeneous and at their designated temperatures, slowly add oil phase ABCD to water phase E with prop mixing. |
| 6 | Start homogenizing combined phases and homogenize for 3 minutes or until batch cools to 55°C. |
| 7 | Resume prop mixing and when batch is below 45°C add premix of phase F and then phase G ingredients, in order, with continued mixing. |
| 8 | Cool batch to room temperature, replace any water lost to evaporation and mix until smooth. |
| Appearance | Off-white to pale yellow lotion |
| Viscosity (Brk, RVD-II, T-D, 20 rpm, after 24 h at room temperature; mPa·s) | 1800 - 3000 |
| 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
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Tel.: 877 427 4255 (International n.: +1 312 385 4494) - Fax: +1 330 929 3616 - E-mail: customerservice@hallstar.com Web Site: hallstar.com
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