Ideal SPF boosting film formers for mineral based sunscreens? 20 listed.

ZinkZink Member
edited November 2016 in Formulating
Looking to get the below 10% ZnO daily wear sunscreen/moisturizer up from SPF ~15 to SPF30.

Base formula (OIW)
Water, Zinc Oxide, Caprylic/Capric Triglyceride, Caprylyl Methicone, Ceterayl Olivate, Sorbitan Olivate, Glyceryl Stearate, Polyhydroxystearic Acid, Triethoxycaprylylsilane, Sclerotium Gum.

Will likely add Butyloctyl Salicylate as a pigment stabilizer to get from SPF15 to ~20-25. Then the ideal film former increases SPF 25%, decreases TEWL, waterproofs the formula and is safe for daily decade long use - it exists, right? smiley 

Here're the ones I've found, spanning from completely natural to completely synthetic, I'm fine with synthetics as long as they have a solid safety track record, especially since this is for a daily wear formula and not just an occasional wear sunscreen. Also waiting to hear back from DOW technicians to see if they have any tips.

Trade Name : INCI
2502 Cosmetic Fluid : Cetyl Dimethicone
2503 Cosmetic Wax : Stearyl Dimethicone
556 Cosmetic Grade Fluid : Phenyltrimethicone
5562 Carbinol Fluid : Bis-Hydroxyethoxypropyl Dimethicone
680 ID Fluid : lsododecane (and) Polypropylsilsesquioxane
9701 Cosmetic Powder : Dimethicone/VinyI Dimethicone Crosspolymer (and) Silica
AMS-C30 Cosmetic Wax : C30-45 Alkyl Methicone (and) C30-45 Olefin
Beeswax : Beeswax
Candelilla wax : Euphorbia Cerifera (candelilla) wax
Carnauba wax : Copernicia prunifera (carnauba) wax
FA 4002 ID Silicone Acrylate : lsododecane (and) Acrylates Polytrimethylsiloxymethacrylate Copolymer
Koboguard® 5400 CCT : Hydrogenated Polycyclopentadiene
LaraCare A200 : Galactoarabinan
Methyl Dihydroabietate? : Methyl Dihydroabietate
MQ-1600 Solid Resin : Trimethylsiloxysilicate
MQ-1640 Flake Resin : Trimethylsiloxysilicate (and) Polypropylsilsesquioxane
SW—8005 C30 Resin Wax : C30-45 Alkyldimethylsilyl Polypropylsilsesquioxane
Syvaclear A200V : Ethylenediamine/Hydrogenated Dimer Dilinoleate Copolymer Bis-Di-C14-18 Alkyl Amide 
Various : Acrylates Copolymer

Let me know if you have any ideas!


Comments

  • This preparation used a lots of chemical Few among them can be avoided if use wisely My suggestion is it would be a good idea if we use only necessary ingredients This will call classical pharmacy practice . Otherwise if we use so many chemical then what's the difference between us and branded product.
  • DoreenDoreen Member
    edited June 2017
    @pradeep
    This is a very old discussion. The fact that it's not active anymore should be an indication that the problem has probably been solved in the mean time.
  • johnbjohnb Member, Professional Chemist
    @pradeep
    You have also misunderstood the object of the post. It was merely a list of possible materials for the specified end use. It is not a LOI for a product.
  • Sunspheres---Dow-- styrene/acrylates copolymer wil give you a 20-30% boost in SPF using Zno/TiO2---- have tested many times and gives a nice even smooth skin feel.Our first go to Booster  .http://www.dow.com/assets/attachments/business/pcare/sunspheres/sunspheres_powder/tds/sunspheres_powder.pdf
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