This sunscreen cream is free from Octinoxate, Oxybenzone, and Octocrylene. In vitro testing suggested SPF ~20, PFA (PPD) ~12 performance with critical wavelength = 379 nm. In vivo testing (5 subjects) yielded static SPF 24 in a US laboratory.
| Phase | INCI Name [INN/USAN] (Other Information) | Trade Name | % Wt | Function |
|---|---|---|---|---|
| A | Homosalate [Homosalate] | 5.00 | UV Filter / Sunscreen Agent | |
Butyloctyl Salicylate | HallBrite® BHB* | 5.00 | Sunscreen Solvent / Emollient | |
| C12-15 Alkyl Benzoate | 3.00 | Sunscreen Solvent / Emollient | ||
Ethylhexyl Methoxycrylene | SolaStay® S1* | 2.00 | Photostabilizer | |
| B | Butyl Methoxydibenzoylmethane | 2.00 | UV Filter / Sunscreen Agent | |
| C | VP/Eicosene Copolymer | 1.00 | Film Former / Water Resistance Enhancer | |
Cetearyl Alcohol | HallStar® TA-1618 Cetearyl Alcohol | 0.50 | Thickener (Nonaqueous) | |
Glyceryl Stearate | HallStar® GMS Pure | 0.74 | Emulsifier | |
PEG-100 Stearate | HallStar® PEG 4400 MS MB | 0.66 | ||
| Potassium Cetyl Phosphate, Hydrogenated Palm Glycerides | 1.70 | Emulsifier | ||
| D | Styrene/Acrylates Copolymer (hollow spherical, 325 nm) | 2.00 | SPF Booster | |
| E | Glycerin | 3.00 | Humectant | |
| Xanthan Gum (pharma grade) | 0.20 | Thickener (Aqueous) / Emulsion Stabilizer | ||
| F | Water (Aqua) | up to 100 | Volatile Carrier | |
| Disodium EDTA | 0.05 | Chelating Agent | ||
| G | Caprylyl Glycol, Phenoxyethanol, Hexylene Glycol | 0.50 | Preservative | |
| Acrylamide/Sodium Acryloyldimethyltaurate Copolymer, Isohexadecane, Polysorbate 80 | 2.00 | Thickener (Aqueous) / Emulsion Stabilizer | ||
| Silica (spherical, 12 µm) | 2.00 | Deoiling Agent |
PREPARATIVE PROCEDURE
| 1 | To a secondary vessel add phase A and start mixing, add phase B and heat to 80°C. |
| 2 | Add phase C into phase AB with mixing. Add phase D into phase ABC and mix until uniform before combination |
| 3 | To the main vessel add premixture of phase E, and then add phase F start mixing. Heat phase EF to 75°C. |
| 4 | When both phases are homogeneous and at their designated temperatures, slowly add phase ABCD to phase EF with prop mixing. |
| 5 | After 5 minutes start cooling batch and when batch is < 50°C add phase G one by one with mixing |
| 6 | Continue mixing until batch is at room temperature, replacing any water lost to evaporation and mixing until smooth. |
PRODUCT CHARACTERISTICS (25°C)
| Appearance | Off-white cream |
| Viscosity (20 rpm, Brk, RV DV-II, T-D, after 24h at room temperature; mPa∙s) | 10000 - 16000 |
| 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