This sunscreen lotion formulation was designed to provide broad spectrum (SPF/PFA <3) label SPF 30 performance. SolaStay® S1 provides very rapid and efficient excited state quenching of Avobenzone, protecting it from photodegradation and so improve sunscreen performance. HallBrite® BHB aids UV filter solubility and enhances product feel. This formulation was subjected to in vitro analysis and delivered SPF ~ 38, PFA (PPD) ~ 12 performance with critical wavelength 377 nm
| Phase | INCI Name [INN/USAN] (Other Information) | Trade Name | % Wt | Function |
|---|---|---|---|---|
| A | Ethylhexyl Methoxycrylene | SolaStay® S1* | 4.00 | Photostabilizer |
| Butyloctyl Salicylate | HALLBRITE® BHB* | 5.00 | Emollient / Sunscreen Solvent | |
| Ethylhexyl Salicylate [Octisalate] | 5.00 | UV Filter / Sunscreen Agent | ||
| Homosalate [Homosalate] | 5.00 | UV Filter / Sunscreen Agent | ||
| B | Butyl Methoxydibenzoylmethane [Avobenzone] | 3.50 | UV Filter / Sunscreen Agent | |
| C | Cetearyl Alcohol | HALLSTAR® TA-1618 CETEARYL ALCOHOL | 1.00 | Thickener (Aqueous) |
| VP/Eicosene Copolymer | 1.00 | Film Former | ||
| polysorbate 60; POE (20) sorbitan monostearate | 1.60 | Emulsifier | ||
| Glyceryl Stearate | HALLSTAR® GMS PURE | 1.95 | Emulsifier | |
| PEG-100 Stearate | HALLSTAR® PEG 4400 MS | 1.30 | Co-emulsifier | |
| D | Water (Aqua) (deionized) | up to 100 | Volatile Carrier | |
| Disodium EDTA | 0.05 | Chelating Agent | ||
| Xanthan Gum (pharma grade) | 0.20 | Thickener (Aqueous) | ||
| E | Preservative | a.n. | Preservative | |
| Butylene Glycol | 3.00 | Humectant | ||
| F | Water (Aqua) (deionized) | 20.00 | Volatile Carrier | |
| Phenylbenzimidazole Sulfonic Acid [Ensulizole] | 4.00 | UV Filter / Sunscreen Agent | ||
| Sodium Hydroxide (20% aqueous) | 2.80 | pH Adjuster | ||
| G | Cyclopentasiloxane | 4.00 | Feel Modification / Enhancement | |
| Silica (spherical, 12 µm) | 2.00 | Feel Modification / Enhancement | ||
| Acrylamide/Sodium Acryloyldimethyltaurate Copolymer, Isohexadecane, Polysorbate 80 | 2.00 | Thickener (Aqueous) |
| 1 | In a secondary Vessel, combine Phase A and mix well. Disolve Phase B with mixing, and heat AB to 80C |
| 2 | Add phase C with mixing until homogenous |
| 3 | In the mian vessel, add water of phase D, and dissolve EDTA. When EDTA dissolve, add Xanthan gum and mix until fully incorporated |
| 4 | Heat main vessel to 80C. Add premix of phase E |
| 5 | When Oil phase (ABC) and water phase (DE) are both homogeneous and at designated temperatures, slowly add ABC into DE with prop mixing |
| 6 | Homogenize for 3 mins. Resume prop mixing, and start cool down with mixing. |
| 7 | Add premixed phase F into ABCDE (pH 7.5-8.0) |
| 8 | When batch is >50C, add phase G individualy with mixing |
| 9 | When the batch is uniform, add deionized water to correct for evaporative losses. Continue mixing with smooth. |
| Appearance | Off White Lotion |
| Viscosity (Brk, RVDV-II, Sp 4, 20 rpm, after 24 h at room temperature; mPa·s) | 4500 - 7500 |
| pH | 6.5 - 7.5 |
*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
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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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