Home Cosmetic Science Talk Formulating Solid vs liquid lipids emulsion stability

  • Solid vs liquid lipids emulsion stability

    Posted by abdullah on November 4, 2021 at 4:30 am

     I make a simple moisturizer emulsion that has 5% lipids. The aim is to reduce the cost as much as possible. It is a low viscosity lotion in flip top bottle.
    Ingredients are 
    Water
    0.6% sodium stearoyl lactylate
    2.4% glyceryl mono stearate
    1% Shea butter or coconut oil

    4% petrolatum or mineral oil
    5% glycerin
    1% phenoxyethanol/caprylyl Glycol
    0.1% caprylyl Glycol
    0.2% EDTA
    0.1% FO
    0.3% xanthan gum
    0.2% dimethicone 5cst

    My question is, does viscosity of lipid phase has any effect on emulsion stability?

    I mean which one would be more stable? Petroleum+shea butter in oil phase or mineral oil+coconut oil.

    abdullah replied 2 years, 3 months ago 2 Members · 2 Replies
  • 2 Replies
  • pharma

    Member
    November 4, 2021 at 5:42 am

    Abdullah said:

    My question is, does viscosity of lipid phase has any effect on emulsion stability?

    Yes. Purely stability-wise, higher inner phase viscosity makes an emulsion (or rather the oil droplets therein) more stable regarding coalescence and Ostwald ripening.

  • abdullah

    Member
    November 4, 2021 at 8:18 am

    Pharma said:

    Abdullah said:

    My question is, does viscosity of lipid phase has any effect on emulsion stability?

    Yes. Purely stability-wise, higher inner phase viscosity makes an emulsion (or rather the oil droplets therein) more stable regarding coalescence and Ostwald ripening.

    Thanks.
    I am currently using petrolatum+shea butter too.

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