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Mineral Sheer Sunscreen SPF 40

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Ingredients
Method
Stability
Extra information
This formulation is W/Si type sunscreen cream designed using only inorganic mineral UV filters that has a sheer appearance when applied to the skin. Solaveil™ MZP7 has unique platelet-shaped structure which enables it to behave like micron-sized ZnO on the skin, and transparent “nano-sized” ZnO under light. Solaveil HTP1 has been developed by using Croda’s patented particle control technology. Its particle size has been carefully balanced to provide minimal whitening on the skin.
Female hands holding a beauty cream on a relaxing natural background

Ingredients

Ingredient/INCI Name  Functionality  % w/w 
Part A    
Deionised Water (Water)   30.00
1,3 BG-K (Butylene Glycol)2 Humectant 3.00
Euxyl PE9010 (Ethylhexylglycerin (and) Phenoxyethanol)3 Preservative 0.80
Sodium Chloride (Sodium Chloride)  Stabilizer 0.50
     
Part B    
Silicone SH200C 2cs (Dimethicone)4 Emollient 20.40
KF-6104 (Polyglyceryl-3 Polydimethylsiloxyethyl Dimethicone)4 Pigment Dispersion Agent    6.00
CrodamolTM GTEH (Triethylhexanoin)1 Emollient 5.00
KF-6028P (PEG-9 Polydimethylsiloxyethyl Dimethicone)4 W/Si emulsifier 2.00
KF-6011P (PEG-11 Methyl Ether Dimethicone)4 W/Si emulsifier 0.50
     
Part C    
Solaveil MZP7 (Zinc Oxide (and) Triethoxycaprylylsilane)1 Inorganic UV filter 24.00
Solaveil HTP1 (Titanium Dioxide (and) Alumina (and) Stearic Acid)1 Inorganic UV filter 6.00
     
Part D    
Sunsphere H121 (Silica)5 Rheology Modifier 1.00
Esben W (Quaternium-18 Bentonite)6 Stabilizer 0.80

Suppliers: 1:Croda 2:Daicel 3:Schülke & Mayr GmbH 4:Shinetsu 5:AGC 6:Hojun

Method

Mix Part A and Part B separately. Slowly add Part C and Part D into Part B with mixing using a homogeniser (6000rpm, 30min over). Heat Part A at 80℃ with stirring. If the temperature of Part (B+C+D) has not risen to 80°C, warm it to 80°C with mixing using a homogeniser. Add Part A to Part (B+C+D) gradually using a homogeniser (6000rpm, 5min). Cool to 38°C with stirring.

Stability

3 months at RT, 5 ºC, 40 ºC, 6 x 5 ºC/+40 ºC 6 hour freeze-thaw cycle and 1 month at 50 ºC

Formulation details

Category/Applications

  • Sun care - Sun protection

Phase type

  • Multiple phase dispersed

Textures

  • Creamy

Formats

  • Cream

Transparency

  • Transparent

Consumer benefit

  • Solar protection

Laboratory

  • Japan

Extra information

Appearance: White/Cream; pH: N/A; Viscosity: 42.15Pas/s (RT, DV#04 12 rpm, 90sec)

In vivo SPF (ISO 24444:2019, 2 subjects, Eurofins CRL, USA): 40

In vitro UVAPF (ISO 24443:2012, Croda, UK): 9.96 (PA+++)

In vitro Critical Wavelength (ISO 24443:2012, Croda, UK): 370 nm

Products included in this formulation

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Solaveil™ HTP1

COSMOS-approved titanium dioxide powder that balances a large particle size with appealing aesthetics. Delivers UVB and UVA protection. Ideal for natural sunscreen formulations.
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Solaveil™ MZP7

Combining all the benefits of micron-sized Zinc Oxide (ZnO) with unrivalled transparency on the skin, the Solaveil MicNo range provides formulators with the best of both worlds. Solaveil MZP7 is a...
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