this doesn’t seem stable to me….? right??
I came across a post on one of the Facebook formulating groups which said:
[quote]For the shampoo (the round cake), I melt SCI powder and use Cetearyl alcohol instead of BTMS since they are similar ingredients, and Cetearyl is inexpensive.
Note: to avoid further discussions about BTMS. I use other conditioning ingredients in my formula. Cetearyl adds better hardness to the bar.[/quote]
When asked by someone what their emulsifier was, as mixing water and oil without an emulsifier wouldn’t produce a stable formula. their response was :
[quote]This is interesting input.
I had been making different formulas with cetearyl alcohol for a couple of years, and one of them was absolutely unstable since it relied only on Cetearyl.
This current formula, aside from powdered surfactants, contains Cocamidopropyl betaine, propanediol, Cocamidopropyl PG-Dimonium Chloride Phosphate, and some other ingredients that altogether improve stability, conditioning properties, and performance.
I will look at Jeesperse and Jeequat as alternatives. [/quote]
I have only been studying cosmetic chemistry for a couple of years (still a ways off being where I want to be).
But… the other commenter is correct, right?
I thought that cetyl and cetearyl alcohols both technically had high HLB (15?) so they need something to balance.
I understand if there’s no oil in product they wouldn’t need to emulsify.
So, like if there was
82% Powdered Surfactants 18% Liquid phase (water,. humectants, maybe some guar hydroxypropyltrimonium chloride)
would create a syndet shampoo bar that is stable, may not be good though.
But surely, you can’t just chuck some cetearyl and cetyl alcohols and decide it’s stable.
Which leads me to my next question…
The OP has stated to every person that questioned them that their “formula” worked well.
But, how? Is it just staying together like glue because it has a correct wet/dry balance?
Would the bar be delivering both oil/water proponents separately and therefore not correctly washing hair?
Or am I missing something? If so, enlighten me.
(unsure if this is right forum discussion. I was going to ask in ‘change my viewpoint’ but thought it’s more formulating related.
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