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Polyquaternium 10 incorporation in a gentle cleansing gel
I am incorporating polyquaternium 10 into a cleansing gel containing Disodium laureth sulfosuccinate 7%, cocamidopropyl betaine 10%, Cocoglucoside 5%, PEG 7 glyceryl cocoate 2%, glycerin 20%, water, Arlypon TT. However, I notice that a thick layer is precipitating at the bottom of the gel after a few hours of storage.
Does polyquaternium 10 require neutralization because it is mentioned on its technical data sheet that it is compatible with all anionic surfactants?
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7 Replies
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What’s the pH of your formula? How do you incorporate the PQ 10? If you make the formula with everything but PQ 10 do you still see the separation? Lastly, can you explain why are you including 20%? glycerin?
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The pH is 5.8. I dissolve the polyquaternium 10 in water, mix, and heat to 60°C until the polyquaternium granules disappear and the texture thickens. At this stage, I add the disodium laureth sulfosuccinate and the other ingredients gradually, adjusting the pH with NaOH, and then adding the Arlypon TT.
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There’s a product on the market marketed as a cleansing oil, but which is clearly not a true oil neither does it contain any lipids. It looks and feels like an oil due to a very high % of glycerin. On application and rub in, it presents with micro foaming but doesn’t turn into a runny low viscosity milky solution. It washes off with excellent after wash skin feel. I suspect half the appeal is that “magic” of an oil that can foam ever so slightly and rinse off so easily with non-drying and softening after feel. Examples: Xemose Cleansing Oil, La Roche-Posay Lipikar Cleansing Oil
I suspect the OP is trying to create a similar product (I’ve been struggling for weeks to thicken a similar formulation with the limited ingredients I have access to).
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It might be the Arlypon TT salting out by the electrolytes from your surfactants (especially from CAPB). Now, why on earth to use such level of glycerin? Rather than using such level of a very hydrosoluble molecule that will rinse away without performing its magic (and depressing foam from your formula), you could focus on making a humecting and mild product.
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For glycerin, since it’s a mild cleansing gel or ”cleansing oil”, I’m aiming for a formula that doesn’t dry out the skin after use. The surfactants I have available are disodium laureth sulfosuccinate, SLES, cocamidopropyl betaine, cocoglucoside, and Sodium Cocoyl Isethionate. The only humectant ingredient I have is glycerin and propylene glycol. If you can advise me on others, I would be grateful
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As mentioned, glycerin might not deliver the effect you want from a cleansing system. Plus, it impairs foam. Now, since water is the best and most abundant hydrating agent in contact with skin, what you can do is to lock in that moisture. For that, you can use some polymers like silicones. There are other choices but might require more complex formulas.
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For the pH, it is 5.8. I dissolve the polyquaternium 10 in water, mix, and heat to 60°C until the polyquaternium granules disappear and the texture thickens. At this stage, I add the disodium laureth sulfosuccinate and the other ingredients gradually, adjusting the pH with NaOH, and then adding the Arlypon TT.
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