This formulation was subjected to in vitro analysis and delivered SPF ~16, PFA (PPD) ~5 performance with critical wavelength 374 nm.
Phase | INCI Name [INN/USAN] (Other Information) | Trade Name | % Wt | Function |
---|---|---|---|---|
A | Butyloctyl Salicylate | HALLBRITE® BHB* | 5.00 | Solvent |
Ethylhexyl Methoxycrylene | SolaStay® S1* | 1.50 | Photostabilizer | |
Ethylhexyl Methoxycinnamate [Octinoxate] | 2.50 | UV Filter / Sunscreen Agent | ||
B | Titanium Dioxide [Titanium Dioxide], Aluminum Hydroxide (60 nm primary particle size) | 2.10 | UV Filter / Sunscreen Agent | |
C | VP/Eicosene Copolymer | 1.00 | Film Former | |
Cetearyl Alcohol | HALLSTAR® TA-1618 CETEARYL ALCOHOL | 1.00 | Thickener (Nonaqueous) | |
Glyceryl Stearate | HALLSTAR® GMS PURE | 2.50 | Emulsifier | |
PEG-100 Stearate | HALLSTAR® PEG 4400 MS MB | 1.00 | Co-emulsifier | |
Cetearyl Olivate, Sorbitan Olivate | OLIVEM® 1000 | 2.00 | Emulsifier / Liquid Crystal Maker | |
D | Water (Aqua) (deionized) | up to 100 | Volatile Carrier | |
Disodium EDTA | 0.05 | Chelating Agent | ||
Xanthan Gum (pharma grade) | 0.30 | Thickener (Aqueous) | ||
E | Preservative | a.n. | Preservative | |
Glycerin | 3.00 | Humectant |
1 | In secondary vessel add A and start mixing, Slowly add B with continued mixing |
2 | Heat this oil phase to 70'C and then, add Phase C with mixing |
3 | To the main Vessel add Water from phase D and start mixing. Add EDTA , when dissolved, add Xanthan gum |
4 | When Fully incorporated, start heating to 70'C and add premix of E. |
5 | when both phases are at 70'C add oil phase (A-C) to the water phase (D-E) with strong mixing |
6 | homogenize for 3 mins and start cooling |
7 | continue mixing until room temperature. Replace any water lost to evaporation, and mix until smooth |
Appearance | White Cream |
Viscosity(Brk, RVDV-II, T-D, 20 rpm, after 24 h at room temperature; mPa∙s) | 15500 - 25500 |
pH | 5.5-6.5 |
*Patented and Patent Pending
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