natural deodorant emulsion problem
Hi, I´m a chemist from Mx, graduated Dec 2018
During first weeks of pandemic I started a personal project to lower stress and do something productive
I started doing experiments to create a natural deodorant stick (aluminum free) but had several problems. I have tried SOO many ingredients and formulations and I have some that have potential… basically some surfactants, oils, waxes, fragance and active ingredients
Problem is I would like it to be an emulsion, so I could dissolve my active ingredients (mainly pH modifiers, very acidic OR very alkaline) and have a fresh feel on the skin but Im having stability problems.
One of my best formulas consists of W/O emulsion with low HLB solid emulsifier (sorbitan stearate) coupled with a little bit of high HLB surfactant (lauryl glucoside)… blends well while melted but when I pour it in the container to solidify the top has a lot of foam and after 3-4 days theres a lot of syneresis
Could someone give me some advice to increase stability? I only have access to a simple stirring/heating plate
Should I go with a water based emulsion instead?
surfactant suggestions that are easy to find and not petroleum based, and not ethoxilated? I tried ceteareth and worked very well, but consumers wont consider it a “clean” ingredient bc of dioxane
finally does anyone know a database with required HLB values for both types of emulsions??
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