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  Sodium PCA and Caprylyl Methicone thickening reaction, what’s happening?

  Posted by Zink on September 9, 2016 at 6:28 pm

  I just made a simple emulsion of
  10% Capric / Caprylic Glycerides
  4% Cetearyl Olivate (and) Sorbitan Olivate 
  4% Caprylyl Methicone
  and rest Water.

  Adding 2% Sodium PCA causes the lotion to thicken in a foamy manner, so there’s some reaction between the silicone and SPCA. It can even cause the whole solution to gel, which /could/ be desirable. 

  Any thoughts on whether this is good or bad? The end formulation will be a sunscreen so I wonder if it could affect pigment dispersion in any way.

  Zink replied 7 years, 7 months ago 1 Member · 0 Replies
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