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SHAMPOO HAS BEEN SEPERATED
Hello everyone, I need your help. We are doing a sulfate-free shampoo, using AOS, CAB as primary and secondary surfactant relatively and using guar gum and PEG-120 methyl glucose dioleate as thickeners. After a few weeks storage, we have a problem that guar gum has been seperated (lower layer). Can anyone explain why and how can we solve this problem?
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4 Replies
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Do you know how much salt is in your formulation ( for example, CAPB normally has ~5% salt content when sold as ~30% ASM)? What is your ASM (active surfactant matter) overall?
You can google “phase separation salt polymer systems” or “aqueous two phase system” to see that when enough of both polymer and salt are present in a system, it will separate into two phases- one rich with polymer and the other rich with salt.
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<font style=”vertical-align: inherit;”><font style=”vertical-align: inherit;”>Thnank you, I appreciate that :D</font></font>
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Can you make a sample without PEG-120 methyl glucose dioleate? In some systems, it tends to gel the product. What you see at the bottom might be water, and the upper part might be a surfactant-rich phase.
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Thanks, I would try it!
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