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Formula with 2 low HLB emulsifiers
In the following formula for a cream currently in the market, how were they able to emulsify using 2 low HLB emulsifiers? I thought a stable emulsion requires a low and high HLB emulsifier.Water, PEG-2 stearate (HLB=4.3), Glyceryl Stearate SE (HLB=5.
, Cetyl Alcohol, Isopropyl Myristate, Carnauba Wax, Phenoxyethanol. -
5 Replies
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Glyceryl Stearate SE (self-emulsifying) means it’s a mixture of glyceryl stearate and sodium stearate; since sodium stearate is anionic, and the HLB system is only meaningful where non-ionic surfactants are involved, that HLB value is not indicative of its power as an O/W emulsifier
and since PEG-2 stearate is typically used as a bulking agent rather than an emulsifier (e.g. as Cithrol DEGMS from Croda), my guess is that it helps in physically preventing the emulsion from separating
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cetyl alcohol has required HLB= 15
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Nasrins where on earth did you get that information from?
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