Amodimethicone or Silicone quaternium 18; which is better for damaged hair ?
I am an old reader but a very new member of this forum. I am thankful to Perry sir for this membership. I also take this opportunity to express my gratitude to all honourable members of this forum. As a formulator the forum discussions were very much useful to me.
Now that I was working on a conditioning shampoo( opaque)project. I have tried 1)Dimethicon 350 cst, 2)Silicone quaternium18(and) Trideceth-6(and) Deceth-7(and) Cocoamidopropyl betain & 3)Amodimethicone (and)Trideceth-12(and)cetrimonium chloride, (and)Ceterath-25 ofcourse Polyquarternium 10 @ 0.3% was always included in every Formulation. The pH was 5.38- 5.56.
My questions are:-
1) Both amodimethicone & silicone quaternium 18 are charged polymers; then why amodimethicone is more preferred & referred for treated hairs ?
It is always said that amodimethicone binds more selectively but I have never referred such a statement for silicone quaternium. Why ? What is the fundamental difference in mechanism ?
2) I have successfully ( at least for now) suspended Dimethicon in shampoo without Sodium xylene sulfonate. If at all I have to use Sodium xylene sulfonate what is procedure :- shall I mix with Dimethicon & add at start/ middle/ end of the batch. Or add Dimethicon as I have done & add Sodium xylene sulfonate in the end. And how much Sodium xylene sulfonate is needed for 1% Dimethicon to suspend properly ?
Thanks in advance.
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