This sunscreen formula delivers superior broad-spectrum protection by using microfine Titanium Dioxide, Octinoxate and Avobenzone with the singlet-quenching photostabilizer SolaStay® S1. In vitro testing indicates SPF ~ 55, PFA (PPD) ~ 21. Critical Wavelength = 380 nm.
Phase | INCI Name [INN/USAN] (Other Information) | Trade Name | % Wt | Function |
---|---|---|---|---|
A | Caprylic/Capric Triglyceride | 4.00 | Sunscreen Solvent / Emollient | |
Dicaprylyl Carbonate | 3.00 | Sunscreen Solvent / Emollient | ||
Ethylhexyl Methoxycinnamate [Octinoxate] | 7.50 | UV Filter / Sunscreen Agent | ||
Butyloctyl Salicylate | HALLBRITE® BHB* | 3.00 | Sunscreen Solvent / Emollient | |
Ethylhexyl Methoxycrylene | SolaStay® S1* | 3.00 | Photostabilizer | |
B | Titanium Dioxide [Titanium Dioxide], Aluminum Hydroxide (60 nm primary particle size) | 4.10 | UV Filter / Sunscreen Agent | |
C | VP/Eicosene Copolymer | 1.00 | Film Former | |
Glyceryl Stearate | HALLSTAR® GMS PURE | 1.83 | Emulsifier | |
PEG-100 Stearate | HALLSTAR® PEG 4400 MS | 1.18 | Emulsifier | |
Potassium Cetyl Phosphate, Hydrogenated Palm Glycerides | 1.50 | Emulsifier | ||
D | Butyl Methoxydibenzoylmethane [Avobenzone] | 3.00 | UV Filter / Sunscreen Agent | |
E | Styrene/Acrylates Copolymer (hollow spherical, 325 nm) | 4.00 | SPF Booster | |
F | Water (Aqua) (deionized) | up to 100 | Volatile Carrier | |
Disodium EDTA | 0.05 | Chelating Agent | ||
Acrylates/C10-30 Alkyl Acrylate Crosspolymer | 0.22 | Thickener (Aqueous) | ||
G | Preservative | a.n. | Preservative | |
Glycerin | 4.00 | Humectant | ||
H | Potassium Hydroxide | 1.10 | pH Adjuster | |
I | Cyclopentasiloxane | 2.50 | Feel Modification / Enhancement | |
Cyclopentasiloxane, C30-45 Alkyl Cetearyl Dimethicone Crosspolymer | 2.50 | Feel Modification / Enhancement |
1 | In a secondary vessel, add phase A ingredients and start mixing. Slowly add phase B to A with continued mixing. Begin heating to 80°C. |
2 | Add phase C ingredients, in order, to phase AB. When homogenous, add phase D to ABC and mix until totally dissolved. Add phase E to phase ABCD just before combining phases and mix until fully dispersed. |
3 | To the main vessel, add the water from phase F and dissolve the Disodium EDTA with mixing. Then, add the Pemulen TR-2 and mix until fully incorporated. Continue mixing and begin to heat this phase to 80°C, then add premix phase G to phase F. |
4 | When both phases are homogenous and at temperature, slowly add phase ABCDE to phase FG with strong mixing. Homogenize intensely for 3 minutes and then return to prop mixing and cooling. When batch is lower than 55°C, add phase H and mix well. |
5 | Then, add premix phase I and mix until uniform. Replace water lost and mix until smooth. Perform quality assurance checks. |
Appearance | Cream-colored soft cream |
Viscosity (Brk, RVDV-II, T-D, 20 rpm, after 24 h at room temperature; mPa·s) | 15000 - 25600 |
pH | 6.0 - 7.0 |
*Patented and Patent Pending
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