Home Cosmetic Science Talk Formulating General Off Topic Pilling, exfoliation and polymethylsilsesquioxane.

  • Pilling, exfoliation and polymethylsilsesquioxane.

    Posted by Graillotion on December 29, 2021 at 4:32 am

    I pretty much use polymethylsilsesquioxane in everything and love the finishing touch it adds to emulsions.

    However, I have read some conflicting thoughts on this recently (I know…I read too much).  The marketing machine always refers to polymethylsilsesquioxane as a spherical powder.  And to our very vague tactile senses….as long as a powder is fine enough…our brain will tell us it is smooth and ’round’.  A perfect example of our brain fooling us would be Diatomaceous earth.  It feels soft, fluffy and ’round’ even though it more closely resembles broken glass.

    So recently I read that polymeth can be a bit exfoliating due to the abrasive nature of the particle.  I have also noticed an ever so slight (I am crazy sensitive to every aspect of my formulation) what I thought might be pilling on my face, where I use my face cream which has the highest inclusion of polymeth.  Since I have been very careful not to include the typical pilling culprits… I was a little surprised.

    I had always wondered if this pilling was not exfoliation…and after reading this respected CC’s comments about polymeth being abrasive, I am almost sure of it.

    I guess the question I am trying to ask is…. Has anyone else experienced exfoliation from the inclusion of polymethylsilsesquioxane?

    Pharma replied 2 years, 3 months ago 3 Members · 2 Replies
  • 2 Replies
  • Pattsi

    January 1, 2022 at 8:04 am

    I have not.

  • Pharma

    January 3, 2022 at 8:18 pm

    Don’t know for sure but I guess that the particles are so fine (and certainly not as ‘edgy’ as diatomaceous earth) that you’d need to rub till your arms hurt in order to get noticeable abrasion/exfoliation… or you apply the cream with a sandblaster, that’ll do a nice job removing all wrikles and age spots and skin and connective tissue and eyeballs… :smiley: .

Log in to reply.