Home Cosmetic Science Talk Formulating Hair shampoo viscosity

  • shampoo viscosity

    Posted by Batoul on January 5, 2021 at 5:40 pm

    Hi
    I prepared a shampoo & I need to increase the viscosity. I made many samples with different NaCl concentrations. the maximum viscosity was 11000 with 0.5% NaCl.
    I use a simple formula:
    SLES, Cocamidopropyl Betaine, cocamide DEA, PEG-7 glyceryl cocoate, polyquaternium -10, polyquaternium-7, NaCl, Glycerin, citric acid, EDTA, frag, preservative, water
    can you help me to increase the viscosity?
    what is the correct ratio of Betaine - SLES - cocamide DEA to obtain the highest viscosity?
    I want to reach a viscosity of 15000 to 20000 cp
    Thank you in advance for your help :smiley:

    I have another question
    how to strengthen the odour of the fragrance without crashing the viscosity

    Batoul replied 3 years, 1 month ago 4 Members · 5 Replies
  • 5 Replies
  • oldperry

    Member
    January 5, 2021 at 8:33 pm

    step 1 - get rid of the glycerin

  • Batoul

    Member
    January 6, 2021 at 4:21 am

    Perry said:

    step 1 - get rid of the glycerin

    Hi perry,
    I use glycerin to dissolve PQ-10 in water more easily
    do you think there is a better way to do this?
    Thank you

  • Andraous

    Member
    January 7, 2021 at 4:18 am

    Batoul said:

    Hi
    I prepared a shampoo & I need to increase the viscosity. I made many samples with different NaCl concentrations. the maximum viscosity was 11000 with 0.5% NaCl.
    I use a simple formula:
    SLES, Cocamidopropyl Betaine, cocamide DEA, PEG-7 glyceryl cocoate, polyquaternium -10, polyquaternium-7, NaCl, Glycerin, citric acid, EDTA, frag, preservative, water
    can you help me to increase the viscosity?
    what is the correct ratio of Betaine - SLES - cocamide DEA to obtain the highest viscosity?
    I want to reach a viscosity of 15000 to 20000 cp
    Thank you in advance for your help :smiley:

    I have another question
    how to strengthen the odour of the fragrance without crashing the viscosity

    20000 ia very high 6000 is enough 

  • chemicalmatt

    Member
    January 8, 2021 at 9:54 pm

    DEL the salt & glycerin (as @Perry points out). Polyquaternium-10: disperse and hydrate in water first before adding anything else. Period. No need to pre-disperse. Best ratio for CAPB:SLES (solids) for viscosity is 1:1. The “classic” build ratio with the amide is SLES:CAPB:Coca DEA at 4:2:1, but increasing ratio of CAPB will raise viscosity. Then again as @Andraous said: why 20,000 cps? Hope this will be packaged in a tube.
      

  • Batoul

    Member
    January 10, 2021 at 6:36 pm

    Thank you @Perry @chemicalmatt
    I omitted glycerin and salt and got an outstanding result.
    regarding the concentration of CAPB, do I have to consider that it is supplied as 30%?
    I have tried this before:
    I have SLES 70%, CAPB 30%, so I used 14.3% SLES : 16.6% CAPB : 2.5% Coca DEA 
    The shampoo was too thin and was not clear or appeared to have precipitation.

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