This formulation is designed to provide U.S. broad spectrum (critical wavelength ≥ 370 nm) performance. HallBrite® BHB aids wetting and dispersion of the Zinc Oxide and contributes to enhanced product feel. Olivem® liquid crystal making emulsifiers provide a stable emulsion while imparting sensorial and physiological benefits. This formulation was subjected to in vitro analysis and delivered SPF ~30, PFA (PPD) ~5 performance with critical wavelength 372 nm.
| Phase | INCI Name [INN/USAN] (Other Information) | Trade Name | % Wt | Function |
|---|---|---|---|---|
| A | Butyloctyl Salicylate | HALLBRITE® BHB* | 7.00 | Emollient |
| Ethylhexyl Methoxycinnamate [Octinoxate] | 7.50 | UV Filter / Sunscreen Agent | ||
| B | VP/Eicosene Copolymer | 1.00 | Film Former | |
| Zinc Oxide [Zinc Oxide], Triethoxycaprylylsilane (30-200 nm primary particle size) | 10.42 | UV Filter / Sunscreen Agent | ||
| Cetearyl Olivate, Sorbitan Olivate | OLIVEM® 1000 | 3.00 | Self-Emulsifier / Liquid Crystal Maker | |
| Cetearyl Alcohol, Cetyl Palmitate, Sorbitan Palmitate, Sorbitan Oleate | OLIVEM® VS FEEL | 2.00 | Emulsifier / Liquid Crystal Maker | |
| C | Water (Aqua) (deionized) | up to 100 | Volatile Carrier | |
| Disodium EDTA | 0.05 | Chelating Agent | ||
| Xanthan Gum (pharma grade) | 0.30 | Thickener (Aqueous) | ||
| D | Preservative | a.n. | Preservative |
PREPARATIVE PROCEDURE
| 1 | To a secondary vessel add phase A, start mixing and heating to 75°C and add Phase B ingredients one at a time, in order. |
| 2 | Mix phase AB well to ensure complete solution of souble material and even dispersion of the oxide. |
| 3 | Add the water from phase C to the main vessel, dissolve the Disodium EDTA and, with continued mixing, add the Xanthan Gum. |
| 4 | When the Xanthan Gum is fully incorporated, start heating phase C to 75°C and add phase D. |
| 5 | When both phases are homogeneous and at their designated temperatures, slowly add oil phase AB to water phase CD with prop mixing. |
| 6 | Homogenize the combined phases for 3 minutes, resume prop mixing and cool batch to room temperature. |
| 7 | Replace any water lost to evaporation, mix batch until smooth and perform quality assurance checks. |
PRODUCT CHARACTERISTICS (25°C)
| Appearance | White to off-white cream |
| Viscosity (Brk, RVDV-II, T-D, 20 rpm, after 24 h at room temperature; mPa·s) | 6400 - 10800 |
| 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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