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shampoo strips all the natural oil
Greetings,
I made a shampoo with 10% SLS and 10% Coco Betaine. After using it strips all the natural oils from hair leaving the hair dry and scratchy. To slove this problem i’m using 0.275% Dimethicone, 0.5% Polyquaternium 11, 0.2% Cationic Gaur Gum but still the problem is there. Is there something else i can do maybe increase the concentration of these moisturizing agents or decrease the concentrations of surfactants.
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8 Replies
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I”m sure the real chemists here might suggest you DECREASE the SLS, because it is a very excellent cleaner, i.e. binds to, and washes away oils, like those on your scalp.
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@Hamaadali008 Usually shampoos have a mixture of more than 2 surfactats of different types. The issue with anionic surfactants (especially the ones with high charge density like SLS) is that part of them exist as micelles (above a limit called CMC, or when combined with Betaines which actually reduce the CMC at which micelles form) and as free molecules (called unimers). The more unimers, the more the chance thay they interact with skin proteins and cause irritation. You want more micelles, and that’s whay you mix your anionics with amphoteric surfactants (like Betaines) or cationic polymers (like polyquaterniums). Maybe you can modify your ration SLS/Betaine, or even add a third surfactant like Cocoamphodiacetate or Lauramine oxide, or even replace part of your SLS for more ethoxylated version (like SLES), or a milder anionic (like Taurate, Sulfosuccinate, Glycinate, etc.).
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Hardly surprising with SLS. Making shampoos that work properly is not that easy, as you will discover.
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Yes, when a shampoo is too drying try reducing the amount of surfactant. It’s difficult to tell but you might have as much as 20% active surfactant. Most shampoos have anywhere from 8-12% active surfactant.
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If you tell us what kind of surfactants you have available we can be a lot more helpful. Can you get SLES? Cocoamidopropyl betaine? Many products on the market use nothing more. ALS? ALES? A better option. Sodium cocoamphoacetate? And, any refatteners? (EG: PEG-7 GC)
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Belassi said:If you tell us what kind of surfactants you have available we can be a lot more helpful. Can you get SLES? Cocoamidopropyl betaine? Many products on the market use nothing more. ALS? ALES? A better option. Sodium cocoamphoacetate? And, any refatteners? (EG: PEG-7 GC)
yes, i can get SLES, SLS and cocoamidopropyl betaine. Is there any combination i can use to solve the problem
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I suggest you simply copy one of the many, many products on the market that are based on SLS, SLES, and CAPB.
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in third world countries you must never trust the raw materials I advise you to change the supplier
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