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Propanediol Deodorant
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To prevent syneresis, you need an emulsifier/emulsion stabilizer like behenyl alcohol, cetearyl alcohol, glyceryl monostearate, or some combination thereof. And definitely a decrease in glycerin will help.
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Behenyl alcohol, cetearyl alcohol, glyceryl monostearate, or combinations thereof are not usual components of stearate based deo sticks.
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@johnb and @CarrissaDowdy, I failed to mention that the addition of sodium chloride also helped with stability of my deodorant stick. NaCl, along with the aforementioned components, actually stabilized my emulsion and solved the syneresis problem that I had with my sodium stearate/propanediol based deodorant.
Below are links to a couple of patents for deodorant stick formulas that incorporate fatty alcohols and sodium chloride.
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My previous comments still apply.
Those materials (and sodium chloride additions) are the subjects of recent patent restraints and thus not of much practical applicability to the enquirer.
I do believe from the dates of the latest posting (two months ago) from the enquirer that she has lost interest or is satisfied with previous replies.
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AGREED but patent is expired—in case someone wants to use concept:also there are ways around it.
US4322400A Legal status
Expired - Lifetime -
The patents I and erindlea were referring are both recent.
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I understand that but principle is the same using salt for set point to control syneresis-could be a mute point but seems true as she is already doing it n”est pas?
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@erindlea thank you. I will take a look at this literature and see if this is something our customer will add to their label copy.
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