Stabilising Quaterniums in a hair milk - Cosmetic Science Talk

Stabilising Quaterniums in a hair milk

Hi All,

I am having difficulty stabilising a hair milk using quaterniums. In particular Quaternium-6.
Without it the formula seems to be stable...

Water to 100%
Microcrystalline Cellulose & Cellulose gum & Xanthan gum - 0.5%

oils (vegetable) - 6%
emulsifier emulium melifera MB (Polyglyceryl-6 Distearate (and) Jojoba Esters (and) Polyglyceryl-3 Beeswax (and) Cetyl Alcohol) - 1.8% 

Preservative - Benzyl Alcohol, Dehydroacetic Acid - 0.75%

Anything that I can add to help stabilise quats? Not allowed to use PEGs unfortunately. Or any emulsifiers which are natural an may be more effective? 

Thanks
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Comments

  • xanthan gum and cellulose gum are both anionic, so they're inherently incompatible with quats: the quickest and easiest solution would be to use a different thickener
    UK based formulation chemist. Strongest subjects: hair styling, hair bleaches, hair dyes (oxidative and non-oxidative) I know some stuff about: EU regulations, emulsions (O/W and W/O), toothpaste, mouthwash, shampoos, other toiletries
  • Hi Bill
    Ok great thanks I didnt know that they were incompatible with quats! Thanks for that. I added them thinking they were stabilising the product.
    Thanks again
  • Hi Bill, could you advise which one to use, please?
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