Home Cosmetic Science Talk Formulating why suger beats sediment in shower gels?

  • natchemist

    Member
    May 18, 2014 at 2:30 pm

    are u using anything to suspend them?

  • OldPerry

    Member
    May 19, 2014 at 7:54 am

    Yes, we would need a better idea of what else is in the formula to answer such a question.

  • Bobzchemist

    Member
    May 19, 2014 at 10:00 am

    Isn’t a sugar beat a type of salsa rhythm? :)

  • Chemist77

    Member
    May 19, 2014 at 11:06 am

    guess nasrins is asking for beads????

  • nasrins

    Member
    May 20, 2014 at 12:26 am

    I used aculyn 88( acrylate/stearath25 methacrylate) for suspention.

  • nasrins

    Member
    May 20, 2014 at 12:27 am

    yes beads. sorry..

  • Chemist77

    Member
    May 20, 2014 at 12:32 am

    Did you neutralize the polymer????????

  • nasrins

    Member
    May 20, 2014 at 12:59 am

    yes with KOH I neutralized it

  • Chemist77

    Member
    May 20, 2014 at 1:17 am

    As Bobzchemist pointed out in one of his posts you are not getting enough yield value with this polymer or the surfactant combination is negating the yield value of your polymer. Viscosity has nothing to do with suspending ability, your yield value is definitely not enough to overcome the effect of gravitational pull on your beads. Either try a better polymer, (I love Aculyn 22) or go soft on your surfactants. Make sure if any of your surfactants has electrolyte content and how much is going into your formula. Electrolytes interfere with polymers and have a very adverse effect on yield value of certain polymers.

    Cheers

  • nasrins

    Member
    May 20, 2014 at 3:11 am

    u mean its better to decraese the surfactant or increase the polymer?

    and why viscosity dosnt affect? I think it affects.

  • Chemist77

    Member
    May 20, 2014 at 3:56 am

    nasrins viscosity only slows down the sedimentation process otherwise its the yield value that controls suspension properties.

  • Chemist77

    Member
    May 20, 2014 at 3:57 am
    See the post below by Bobzchemist and check the link, wonderful article 


    Suspension ability is a function of yield value/yield stress, not viscosity/thickness. It’s possible to formulate a relatively thin gel with good suspending capacity. 

  • Bill_Toge

    Member
    May 20, 2014 at 12:32 pm

    in my experience with suspension shower gels and similar products, more surfactant = more Newtonian flow properties = less efficient suspension

  • Chemist77

    Member
    May 20, 2014 at 12:42 pm

    @Bill hence we use polymers to take it towards non newtonian behavior but keeping in mind the ever present gravity and thats where the optimization and selection of ingredients come into play.

    cheers

  • nasrins

    Member
    May 21, 2014 at 8:46 am

    both aculyn 88 and aculyn 22 are

    Acrylates/Steareth-20 Methacrylate Copolymer

  • Chemist77

    Member
    May 21, 2014 at 8:49 am

    Since I haven’t used Aculyn 88 I couldn’t comment on that, chemically same but still I haven’t used this grade.

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