City Defense Lotion

Hallstar
This water-in-oil sunscreen lotion provides broad spectrum (SPF/PFA ≤ 3), label SPF 50 performance without using organic UV filters. HallBrite® BHB in HallBrite® EZ-FLO ZDX aids wetting and dispersion of the Zinc Oxide and contributes to enhanced product feel. This formula was subjected to in vitro analysis and delivered SPF ~53, PFA (PPD) ~18 (PA++++), performance with critical wavelength 379nm.
Phase
Product
INCI Name
Supplier
Volume
A
HallStar® OP1
Ethylhexyl Palmitate
10.00
Sensolene®*1
Ethylhexyl Olivate
5.00
HallBrite® EZ-FLO ZDX*1
Zinc Oxide [Zinc Oxide] (non-nano) (60%), Butyloctyl Salicylate, Triceteareth-4 Phosphate, Trimethoxycaprylylsilane
15.00
Cetyl PEG/PPG-10/1 Dimethicone
3.00
Dimethicone (50 cSt)
6.00
B
Titanium Dioxide [Titanium Dioxide], Aluminum Hydroxide (60 nm primary particle size)
5.50
C
Olivem® 9001
Sorbitan Olivate
1.00
Styrene/Acrylates Copolymer (hollow spherical, 325 nm)
3.00
D
Water (Aqua) (deionized)
to 100
Glycerin
6.00
E
Disodium EDTA
0.05
Xanthan Gum (pharma grade)
0.20
F
Preservative
a.n
Aluminum Starch Octenylsuccinate
2.00

Preparation:

Add phase A to the main vessel and start mixing. Add phase B and heat to 80°C. Add phase C and mix until uniform. Add phase D to a secondary vessel and start mixing. Add phase E items in order. Heat to 80°C. When both phases are homogenous at their designated temperature, start homogenizing phase ABC. Very slowly add phase DE. Begin cooling to room temperature. When batch is below 50°C, add phase F. Continue mixing until uniform and at target temperature.

Notes:

Appearance: White lotion Viscosity (Brk, DV II, T-D, 20 rpm, after 24 hours at room temperature; mPa∙s): 4000–6500
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