Stearamidopropyl Dimethylamine in Shampoo

Does anyone know how to add Stearamidopropyl Dimethylamine in Shampoo instead of cationic guar without heating the whole batch to 75°c? 

Shampoo is cold process and ingredients are as follow. 

SLES
CAPB
Lauryl Glucoside
Coco Glucoside
Decyl glucoside
Sodium phytate
Cationic guar
Glyceryl oleate 
Benzyl alcohol and DHA
Citric acid

I want to replace cationic guar that we use at %0.3 with Stearamidopropyl Dimethylamine because of buildup on hair. 

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Comments

  • PerryPerry Administrator, Professional Chemist
    You can't.  Stearamidopropyl Dimethylamine is a cationic surfactant and you have to melt it to get it to disperse in water. It also isn't a suitable substitute for catinoic guar.
  • AbdullahAbdullah Member
    @Perry ; So what is a good replacement for cationic guar in thisSthis with no or minimum buildup? 
  • PerryPerry Administrator, Professional Chemist
    Polyquaternium-10 or Polyquaternium-7 or use another version of Guar (e.g. Hydroxypropyl Guar Hydroxypropyltrimonium Chloride).

    Guar is not an ingredient that normally causes problems of build-up.
  • zikikizikiki Member
    Stearamidopropyl or alkylpropyl dimethylamine in general, are non-ionic surfactant in natural form. So if you use some acid and make your solution at PH<PKa of the protonated form of amine, you will have their protonated form, and the surfactant began ionic. In that form are very more soluble, and u don't need to go at their melting point. Just warm up slightly.
  • AbdullahAbdullah Member
    @zikiki like what pH for Stearamidopropyl Dimethylamine?
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