motif élémentaire de la molécule
motif élémentaire de la molécule
Nom IUPAC poly(dimethylsiloxane)
Synonymes Diméthicone
No CAS 63148-62-9
No E E900
Propriétés chimiques
Formule brute C2H6OSi(C2H6OSi)n
Masse molaire 74,1539 gmol-1
C 32,39 %, H 8,16 %, O 21,58 %, Si 37,87 %,
Unités du SI & CNTP, sauf indication contraire.

Le polydiméthylsiloxane, communément appelé PDMS ou diméthicone, est un polymère de la famille des siloxanes souvent présent dans les shampoings. On l'y ajoute pour augmenter le volume des cheveux mais il peut également aller boucher les pores du cuir chevelu et rendre les cheveux gras. C'est une des raisons pour lesquelles se laver les cheveux tous les jours est très déconseillé.

Il existe également de l'amodiméthicone, qui est un dérivé du diméthicone.

Le polydiméthylsiloxane est un additif alimentaire, utilisé comme anti-moussant dans les boissons (Coca-Cola BlāK) et aussi dans le guacamol du H3.

  • Portail de la chimie Portail de la chimie
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