Powerhouse Protector Sunscreen SPF 40

This Powerhouse Protector sunscreen demonstrates the powerful synergistic impact that the SolaStay® S1 photostabilizer can have, even with photostable UV filters. While it does not contribute significant SPF and PFA on its own, SolaStay® S1 increases the photochemical efficiency of the high molecular weight organic UV filters to enable SPF 40 UV protection. Hallstar solvents, led by the powerful Spectrasolv® DMDA, also enable simple and effective solubilization of these challenging solid organic UV filters. In vivo testing in a US laboratory (3 subjects) yielded static SPF 40.25, and in vitro analysis suggests SPF ~ 37, PFA (PPD COLIPA2011) ~14, and critical wavelength of 375 nm.

PREPARATIVE PROCEDURE

1	To a secondary vessel add phase A with mixing and heat up to 80°C;
2	Add phase B into phase A, and mix well until uniform;
3	To the main vessel, add pre-mixture of phase C and add phase D with mixing. Heat up to 80°C;
4	When AB and CD phases are homogeneous, slowly add phase AB to phase CD with strongly mixing;
5	After combination, mix for 10 minutes, then start cooling with mixing;
6	Strat cooling. When < 50°C, add phase E with mixing until uniform.
7	Add water lost and mix until uniform.

PRODUCT CHARACTERISTICS (25°C)

Appearance	Smooth cream
Viscosity (20 rpm, Brk, RV DV-II, T-D, after 24h at room temperature; mPa∙s)	43000 - 47000
pH (as is)	5.0 - 5.5