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Sodium cocoyl glutamate viscosity issue.
Hi forum.
I was trying to produce a sulfate-free shampoo as a product to wash my dry scalp.
Here is the formula:
Acqua
Tetrasodium Glutamate Diacetate 0.3
Pentylene Glycol 5
Disodium/Sodium Cocoyl Glutamate 30
Cocamidopropyl Betaine 10
Disodium Cocoamphodiacetate 2
Polyglyceryl-4 Caprate 4
Polyquaternium-7 1
D-Panthenol 1
When I put all the ingredients PH is around 6.5 and it is transparent. When I add lactic acid to lower PH to 5 (which takes a lot of substance compared to when I have to lower Ph in a SLES+CAPB starting from Ph 11) the solution starts to get cloudy and finally total white. The product ends to be thick ad act as a slime, I could pour on my hand and start to play with it. It doesn’t even fall from the space between my fingers lol.
Could you tell my why?
I tried with different types of surfactant suppliers, even with CAPB and others.
PS: I already tried to produce the formula without the other ingredients, only water, Sodium Cocoyl Glutamate and CAPB and the result is the same. I can only work with this surfactant if I introduce 3-4% of sodium methyl cocoyl isethionate but don’t like it at all.
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2 Replies
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Maybe it is Disodium/Sodium Cocoyl Glutamate. Remove it and see or dont reduce pH below 6 and see what happens.
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I’ve seen a similar gel phase forming with different type of anionic-cationic surfactant systems. Can you try a sample without CAPB, adjust the pH and add the CAPB at last and little by little (add 1% for instance, mix and see what happens; if the solution is still clear, add another 1%).
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