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Comparatively Speaking: Cocamide DEA vs. MEA vs. DIPA in Shampoos

Figures

Tables

  • Table 1. Formulations with Alkanolamides

    Table 1. Formulations with Alkanolamides

      Formula 1 Formula 2 Formula 3 Formula 4
    Water (aqua) 15.5%w/w 14.0%w/w 14.0%w/w 14.0%w/w
    Sodium lauryl sulfate (SLS) 35.0 35.0 35.0 35.0
    Sodium lauryl ether sulfate (SLES) 35.0 35.0 35.0 35.0
    Cocamidopropyl betaine 14.5 14.5 14.5 14.5
    Cocamid DEA 0 1.5 0 0
    Cocamid MEA 0 0 1.5 0
    Cocamid DIPA 0 0 0 1.5
    Total 100.0 100.0 100.0 100.0

     

  • Table 2. Viscosity Response to Sodium Chloride

    Table 2. Viscosity Response to Sodium Chloride

    % Sodium chloride Formula 1 Formula 2 Formula 3 Formula 4
    0 100 100 100 100
    0.50 200 300 1,800 2,000
    1.00 300 6,000 16,800 14,040
    1.50 900 18,000 6,000 600
    2.00 5,300 14,800    
    2.50 14,400      
    3.00 14,800      

     

  • Table 3. Viscosity Maximum of Alkanolamides with Sodium Chloride

    Table 3. Viscosity Maximum of Alkanolamides with Sodium Chloride

      Viscosity Maximum % Sodium Chloride
    Formula 1 14,040 2.5
    Formula 2 18,000 1.5
    Formula 3 16,800 1.0
    Formula 4 14,040 1.0

     

By: Anthony J. O'Lenick, Jr., Siltech LLC
Posted: August 25, 2009

Tony O’Lenick asks Bob Coots, PhD, of Colonial Chemical Inc., "What is the difference between cocamide DEA, MEA or DIPA when used in shampoos?" Following is Coots's response.

Chemically, alkanolamides are the reaction product of an alkanolamine such as monoethanolamine (MEA), diethanolamine (DEA) or diisopropanolamine (DIPA) and a fatty material such as triglyceride, acid or methyl ester. Their general structures can be represented as: 

R-C(O)-NH-CH2CH2OH     Cocamide MEA

R-C(O)-N-(CH2CH2OH)2     Cocamide DEA

R-C(O)-NH-CH2CH(CH3)OH     Cocamide DIPA