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Strange phenomenon in hair conditioner formulation
Trying to see the effect of adding ultrez 20 carbomer in hair conditioner(wich have 3.8 ph) some strange phenomenon happened.
*first try : adding 0.3% ultrez 20 carbomer Neutralised at 3.8 pH no viscosity added to hair conditioner I guess result is logic because at such pH carbomer didn’t work good to add viscosity.
*second try : adding 0.3% ultrez 20 Neutralised at 4.8 two strange phenomenons happened the first high increasing of viscosity (viscosity is soo higher then 0.3% ultrez 20 solution) also the texture changed dramatically from smooth thin to granulated thick , the second phenomenon the obtained pH is 5.5 (so how mixing 4.8 pH solution with 3.8 pH solution gives 5.5 pH???!!!)
I want from experts to explain me what happened exactly to get this two strange phenomenons? Any reaction happened?
(the process was mixing 30% of 1% ultrez 20 carbomer solution Neutralised by TEA with 70% hair conditioner)
Hair conditioner ingredients: Water, Cetearyl Alcohol, Cetrimonium Chloride, Ceteareth-20, Panthenol, Shea Butter, Aloe Barbadensis Leaf Juice, Polyquaternium-7, MPG, Citric Acid, Sodium benzoate, Potassium Sorbate, Methylchloroisothiazolinone, Methylisothiazolinone,Colorant, Fragrance.
@Perry44 @chemicalmatt @Abdullah @ozgirl @ketchito @Cafe33 @Paprik @PhilGeis @Graillotion
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6 Replies
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The right one is hair conditioner without carbomer and the left one with carbomer
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update : separation happened for hair conditionner with ultrez 20 .
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my guess is related to the fact you mixed a polymer that has potential to be anionically charged (ultrez 20) with cationic surfactant and polymer. The first trial you hadn’t neutralized the polymer so it didn’t provide viscosity but also didn’t interact with the cationics. The second trial had neutralized carbomer so the carboxylate groups were able to interact with the cationics and form some kind of complex/precipitate.
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Nice guess. Just I guess even not Neutralised the carbomer is anionc not?
So if it in both case there is anionc and cationic charges.
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I guess it’s possible some of the ultrez had negative charge, but my guess is not much. if you look at the material structure (attached from harry’s cosmeticology 9th ed) the carboxylic acid group is what you are neutralizing when the pH is raised. so when the pH is lowered enough the carbomer shouldn’t have a charge, it will just revert to the acid form.
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In that case your explanation is logic. Thanks for the new information.
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