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When to add dimethicone in a lotion?
When to add dimethicone in a lotion for the purpose of reducing soaping effect?
A: at oil phase before emulsification
B: at Cool down phase at temperature below 30°c
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8 Replies
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As my mentor taught me… the silicones (unless you are using silicone emulsifiers specifically) are the most difficult ingredient to emulsify in the entire product. Hence…you want it in there as EARLY as possible…so it gets the WHOLE emulsifying experience, start to finish.
Obviously Dimethicone above 6cst is not volatile…and not heat sensitive as well.
(And even if it was volatile…we would just end up getting a lecture on vapour pressures and boiling points…and being a ‘dumb American’) 😂
Aloha.
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@yyy thanks
@Graillotion you said dimethicone 6 cst. it is 0.5% dimethicone 5 cst. I am adding it thinking it is not volatile. Are you saying it is volatile?
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I am saying….it is irrelevant…add it early (to the oil phase). Lots of bad lore on the topic.
I add my D5… to the oil phase…before heating. Really long technical expose from Pharma on this topic. So, I’ll have to go with….just trust me. 😉 You know…vapour pressures…boiling points of volatile silicones….
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depending on the brand….often the line is between 5 and 6.
Easy to answer…. leave a drop out on a surface that it cannot penetrate….and see if it is there tomorrow…. Bingo…you have your answer.
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Good
Thanks
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Actually…the test I gave is probably a poor metric. Even mercury is volatile…and I doubt you could live long enough….to see one drop completely volatilize. 😂
People just seem to lose their minds….when they hear the word ‘volatile’.
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If it is dimethicone 100cst, then it can be heated together with other emulsifier or oil, then to be add into the water phase for emulsification.
If volatile silicone, then it will need to be added at the cooling phase..
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thanks for useful post !
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