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Using two anionics in the same formula….Why?
As I was looking at INCI’s on incidecoder dot com the other day…I came across a brand that was pretty consistently using a pair of anionics as co-emulsifiers. They were using both SSG and GSC in the same formula, and based on INCI order, these were not even the primary emulsifier.
What is some of the logic, behind using a pair of anionics as co-emulsifiers.
I should state…I always use one or the other…but it had never occurred to me….to use both as a ‘co’.
Let me hear why you may have used two supporting anionics….in the same formula.
Aloha
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6 Replies
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It’s been said that using multiple different types of emulsifiers can lead to more stable emulsions. It can also help modify HLB of the whole system.
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Perry said:It’s been said that using multiple different types of emulsifiers can lead to more stable emulsions. It can also help modify HLB of the whole system.Both GSC and SSG…are very similar HLB. Also they were using Methyl Glucose Sesquistearate…as their primary, so a PEG free system?
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Maybe blending these emulsifiers improve skin feel.
SLS on it’s own is the harshest surfactant but i saw somewhere that a blend of SLS and SLES has better after feel than SLES or SLS alone.
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@Graillotion - On a molecular level, the shape of the molecule can affect the packing and structure of the micelle. So, multiple emulsifiers are able to give some stability. I’m not really certain about the system you are describing but that would be my guess as to why they have multiple emulsifiers.
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Hi Graillotion. Glutamates are often used in combination with sulfates (at a lower concentration) to improve gentleness- they tend to reduce the absorption of sulfates into the skin. They might also help in stabilizing the foam or modifying the foam’s characteristics.
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Sorry, Im realizing you are not talking about surfactant systems, but improving emulsion stability with anionic co-emulsifiers. In this case it might improve emulsion stability but I’m not sure exactly how.
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