Formation of a water in silicone oil emulsion

Good afternoon everyone :)

I have been working on a low internal phase emulsion of water in a mixture of cyclomethicone and hexadimethylsiloxane. However I am having problems with the stability of my emulsion. I have used Dow Corning TI-6021 however my emulsions don't last longer than 4 days. I can not find any reference to a low water content emulsion, it seems this is rarely done as the idea of adding water is to decrease the overall cost of the product. If anyone has an idea of how this could work any help would be really appreciated.


Many thanks

Comments

  • chemicalmattchemicalmatt Member, Professional Chemist
    NeilL, I've made a lot of these and you will have little success with a LOW internal phase w/Si inverse phase emulsion. These are stabilized by having HIGH internal phases as you've discovered, plus other factors. You may be better off transitioning to an alkyl modified W/Si emulsifier such as those supplied by Evonik (Abil EM-series). Those accommodate lower internal phases better. 
  • To lower costs, you can also get cheap, generic cyclomethicone (usually made in China), instead of water.
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