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GHPTC - yes again
Hello guys,
here I am again with the same ingredient (will make me pull all my hair out 😀 ) Guar Hydroxypropyltrimonium Chloride.
Yes, I am still struggling to incorporate it into a shampoo. Please see attached picture
Very basic formula
93.1% Water
0.4% GHPTC
6% Sodium Lauryl Sulfoacetate (SLAS)
0.5% Liquid Germall Plus
pH 5.4
Method:
Added GHPTC into water vortex until fully dispersed. Added SLAS also under stirring and after put on heat to around 60°C until SLAS disolves (low shear).
Wait until <40°C, added preservative and checked and adjusted pH with 40% citric acid solution. Result was normal, slightly viscous product, little bit bubbles, nothing crazy for 100g batch size. Would normally go away over night.
The next day though?? On top of it a creamy layer appeared. It is not solid, it’s more like liquified soap bar. Anyone has any experiences with this?
Any help would be appreciated. Thanks maties 🙂
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6 Replies
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I don’t have experience with such thing but a long time ago i once mixed i think pq10, EDTA and SLES and the color turned pink after a few minutes. I then made another batch with adding CAPB after pq10 and it had no problem.
So my suggestion is use some CAPB or a nonionic surfactant after your cationic thing and see if the problem is solved.
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I think Abdullah is right. I just googled the component:
Guar hydroxypropyltrimonium chloride is commonly used as a conditioning agent in shampoo formulations. It forms a coacervate with anionic surfactants from the shampoo formulation upon dilution
So it seems anionic surfactant is causing the problem.
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And from here http://www.thecosmeticchemist.com/molecule_of_the_week/guar_hydroxypropyltrimonium_chloride.html:
The dilution and deposition phenomenon occurs when the system is diluted below the critical micelle concentration of the shampoo surfactants, resulting in the formation of the insoluble coacervate
I assume you’ve got insoluble coacervate due to high dilution (too much water?)
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I agree with previous comments. Add CAPB before your anionic. Also, make sure you have a good final viscosity, which also contributes to your product stability.
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Also, 0.4% seems high. We used a max of 0.2% and got clarity
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Thank you guys!
I was planning on adding Coca-Betaine after to increase viscosity, however firstly I wanted to check if the gum will hydrate properly/check stability.
@ketchito told me once that GHPTC works best with anionic surfactant to create those coacervates.
Soooo, the bottom line -
1. Add Guar into vortex
2. Add Coca-betaine
3. Add anionic (SLSA)
4. heat, preservative etc …
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