This sunscreen lotion formulation was designed to provide broad spectrum (SPF/PFA ≤3) label SPF 40 performance. SolaStay® S1 provides very rapid and efficient excited state quenching of Avobenzone, protecting it from photodegradation, while also mitigating the photocatalytic and reactive oxygen species generating activities of the oxide, improving sunscreen performance. HallBrite® BHB aids UV filter solubility and enhances product feel. This formulation was subjected to in vitro analysis and delivered SPF ~ 40, PFA (PPD) ~ 29 performance with critical wavelength 380 nm.
| Phase | INCI Name [INN/USAN] (Other Information) | Trade Name | % Wt | Function |
|---|---|---|---|---|
| A | Ethylhexyl Methoxycrylene | SolaStay® S1* | 3.00 | Photostabilizer |
| Ethylhexyl Salicylate [Octisalate] | 5.00 | UV Filter / Sunscreen Agent | ||
| Diisobutyl Adipate | HALLTRESS® DIBA SPECIAL | 6.00 | Emollient / Sunscreen Solvent | |
| Butyloctyl Salicylate | HALLBRITE® BHB* | 5.00 | Emollient / Sunscreen Solvent | |
| B | Titanium Dioxide [Titanium Dioxide], Aluminum Hydroxide (60 nm primary particle size) | 3.50 | UV Filter / Sunscreen Agent | |
| C | Cetearyl Alcohol | HALLSTAR® TA-1618 CETEARYL ALCOHOL | 0.50 | Thickener (Nonaqueous) |
| VP/Eicosene Copolymer | 1.00 | Film Former | ||
| Glyceryl Stearate | HALLSTAR® GMS PURE | 1.35 | Emulsifier | |
| PEG-100 Stearate | HALLSTAR® PEG 4400 MS | 1.00 | Co-emulsifier | |
| Potassium Cetyl Phosphate, Hydrogenated Palm Glycerides | 2.00 | Emulsifier | ||
| D | Butyl Methoxydibenzoylmethane [Avobenzone] | 3.00 | UV Filter / Sunscreen Agent | |
| E | Water (Aqua) (deionized) | up to 100 | Volatile Carrier | |
| Disodium EDTA | 0.05 | Chelating Agent | ||
| Xanthan Gum (pharma grade) | 0.30 | Thickener (Aqueous) | ||
| Glycerin | 3.00 | Humectant | ||
| F | Preservative | a.n. | Preservative | |
| Acrylamide/Sodium Acryloyldimethyltaurate Copolymer, Isohexadecane, Polysorbate 80 | 2.00 | Thickener (Aqueous) | ||
| Cyclopentasiloxane | 3.00 | Feel Modification / Enhancement | ||
| Aluminum Starch Octenylsuccinate | 2.00 | Deoiling Agent |
| 1 | In secondary vessel add phase A and start mixing. Disperse phase B with continue mixing. |
| 2 | Heat AB to 85°C and then, add phase C with mixing. |
| 3 | Add phase D into ABC and mix well until phase D is dissolved. |
| 4 | Add water and glycerin of phase E to the main vessel, dissolve EDTA with mixing and then add Xanthan Gum. |
| 5 | When solids of phase E are fully incorporated, start heating to 80°C. |
| 6 | When both phases are homogenous and at temperature, slowly add oil phase (ABCD) to the water phase (DE) with prop mixing. |
| 7 | Start homogenizing for 3 minutes. Return to prop mixing, and start cooling down until room temperature. |
| 8 | Add phase F ingredients when batch < 40°C with mixing. Replace any water lost to evaporation, and mix until smooth. |
| Appearance | Off white cream |
| Viscosity (Brk, RVDV-II, T-D, 20 rpm, after 24 h at room temperature; mPa∙s) | 15000 - 25000 |
| pH | 5.5 - 6.5 |
| Stability (45°C) | pass three months |
| Stability (three freeze-thaw cycles) | pass |
*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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