• Formulating

  Stearamidopropyl Dimethylamine in Shampoo

  Posted by Abdullah on July 6, 2020 at 12:33 am

  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. 

  Abdullah replied 4 years, 4 months ago 3 Members · 5 Replies

  • shampoo
• 5 Replies

• 

  OldPerry

  Member

  July 6, 2020 at 12:26 pm

  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.

• 

  Abdullah

  Member

  July 7, 2020 at 9:35 am

  @Perry  So what is a good replacement for cationic guar in thisSthis with no or minimum buildup? 

• 

  OldPerry

  Member

  July 7, 2020 at 12:39 pm

  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.

• 

  zikiki

  Member

  July 7, 2020 at 1:13 pm

  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.

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  Abdullah

  Member

  July 8, 2020 at 9:04 am

  @zikiki like what pH for Stearamidopropyl Dimethylamine?

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