Sodium Cocoyl Isethionate & Coco Betaine

Hallo.. I made a Coco Betaine/SCI blend, ratio 3:1. Melted the combined mixture at about 40°C until a thick white paste is formed.

I did various trials with it and I find the blend causes lots of foaming in every one of the experiments. To isolate that the foaming is indeed caused by SCI/CAPB, I removed all ingredients, leaving only CAPB/SCI and water. I tried 25% CAPB/SCI - 75% Water, down to 10%-90%. At 25% CAPB/SCI the texture is a foamy, fluffy, viscous "cloud". At 10%, it still foams but just on the surface. 

Is there an explanation to this weird foaming and a way to overcome this please? 

Comments

  • MarkBroussardMarkBroussard Member, Professional Chemist
    Sodium Cocoyl Isethionate and Coco Betaine are both surfactants ... so, of course they foam.  There is nothing "weird" about the foaming, it's what surfactants do.
    Chemist/Microbiologist formulating in the Organic & Naturals arena under ECOCert/Natural Products Assn/Whole Foods/National Organic Program guidelines focused skincare & haircare products. 

    See website for details www.desertinbloomcosmeticslab.com
  • @MarkBroussard

    I don't mean that they foam when washing with them, they foam when being formulated and stayed foamy, fluffy, cloud like. I've made body cleansing products with other surfactants like coco betaine, babassu betaine, decyl glucoside and coco glucoside and the products turn out as how you'll expect shower cleanser to be, viscous but fluid.

    However with the coco betaine/sci, the product self foams and as described above, it's like a fluffy cloud, definitely not something you'll expect a cleanser to look like in a bottle..
  • MarkBroussardMarkBroussard Member, Professional Chemist
    @africanbug: That's more clear ... It sounds like you are simply stirring it too much.

    (1)  Add the SCI to water and heat to 90C - 95C.  Do not stir, just let the heat melt the SCI pellets.

    (2)  Allow (1) to cool to 70C and add the Coco Betaine while stirring ever so gently to make uniform.

    (3)  Add the remainder of your ingredients.
    Chemist/Microbiologist formulating in the Organic & Naturals arena under ECOCert/Natural Products Assn/Whole Foods/National Organic Program guidelines focused skincare & haircare products. 

    See website for details www.desertinbloomcosmeticslab.com
  • @MarkBroussard thank you so much for the instructions, it works beautifully! I have a clear viscous product, until eo was added..
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