Sulfate-free Shampoo Seperation

Hi guys,

Any pointer on increasing stability of a sulfate-free shampoo?

Comments

  • PerryPerry Administrator, Professional Chemist
    Without an ingredient list there isn't much help we can give.


  • Sure.

    I cant share % but I can provide the materials used


    PHASE A
    -DEIONIZED WATER,
    -ACRYLAMIDE. ACRYLAMIDE/COPOLYMER

    PHASE B
    -PRESERVATIVE 

    PHASE C
    -COCAMIDOPROPYL HYDROXYSULTAINE
    -POLYQUATERNIUM 7
    -ACETAMIDE MEA
    -SODIUM C14-16 OLEFIN SULFONATE

    PHASE D
    -PERSEA GRATISSIMA ( AVOCADO ) OIL
    -HYDROLYZED WHEAT PROTEIN
    -PRUNUS AMYGDALUS DULCIS OIL 

    PHASE E
    -GLYCOL DISTEARATE (AND) LAURETH-4 (AND)COCOAMIDOPROPYL BETAINE --PEG-150 Pentaerythrityl Tetrastearate (and) PPG-2 Hydroxyethyl Cocamide (and) Water, 
  • PerryPerry Administrator, Professional Chemist
    The number one thing to do is to get rid of the oils.
    Shampoos are supposed to clean hair which means remove oils.
    Putting an oil in your formula is just making it a less effective shampoo & leads to separation.
  • @DreaNkenna Could you describe precisely what you're experiencing as phase separation? If you have sedimentation, that can be your pearlizer not having enough support to be suspended (Versathix doesn't give much resistance to shear). If you see creaming (a white layer on top), that might be the acrylamide opacifier.
  • Perry said:
    The number one thing to do is to get rid of the oils.
    Shampoos are supposed to clean hair which means remove oils.
    Putting an oil in your formula is just making it a less effective shampoo & leads to separation.
    Oils are in at negligible levels. Basically the whole phase D is there as callouts.
  • ketchito said:
    @DreaNkenna Could you describe precisely what you're experiencing as phase separation? If you have sedimentation, that can be your pearlizer not having enough support to be suspended (Versathix doesn't give much resistance to shear). If you see creaming (a white layer on top), that might be the acrylamide opacifier.
    hmm ok. well at about 6 months there is creamy at the top, but by 12 months  the sediment has fallen to the bottom. Honestly, the product still appears to be pearlized a bit, so the acrylamide may be the issue
  • PerryPerry Administrator, Professional Chemist
    I had this same problem with a pearl system years ago. Using a Carbomer (EDT 2020 I think), that helped suspend the pearl and kept the formula stable.
  • DreaNkennaDreaNkenna Member
    edited August 12
    Perry said:
    I had this same problem with a pearl system years ago. Using a Carbomer (EDT 2020 I think), that helped suspend the pearl and kept the formula stable.
    Ok that actually makes sense. Do you think this woudl effect the overall rheology?
  • PerryPerry Administrator, Professional Chemist
    Not much.  But you'll have to test to find out.
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