[Peppas_I]

Sibech said:

@Peppas_I basically you package the formulation to a cannister, add the dip tube-cap with a casket & seal it, then add the propellants afterwards (pumping them into under pressure).

And just pumping propellants into appropriate container is sufficient to get them trapped in the gel?

[Peppas_I]

MArchambault said:

Did this in a lab a long time ago.  We made a thick gel with gums and then pumped in the propellant (butane/propane).  Then when it applies to the skin the propellant evaporates to create the crackling in the product.  

So when you say thick gel, you mean gooey product? Also how exactly do you pump propellants into a mixture like this? I am not at all familiar with the procedure.

[Peppas_I]

Have not worked with montanov, and from a brief search couldn’t find specifics about its exact emulsifying capabilities. Good pH for aristoflex. I would do some stress tests to determine stability, but without knowing the exact behaviour of the emulsifier, nothing is for certain. So just mess around with emulsion stress tests and variations. 

[Peppas_I]

EVchem said:

here’s a sample formulation i saw on UL prospector that includes full procedure, I’ve never made anything like this but I’ve seen talk about it before

I can see this formula with all the amount of silicone and gelling agents being closer to what I saw, but still, must be the same principle of trapped propellants. Just seems hard to believe that’s what it is, based on the product I tried. Guess I have to get my hands on it again and really look at the ingredient list 

[Peppas_I]

Pharma said:

Good question, I wonder the same thing. Tried such a product once but can’t remember what it was… I can remember that there was seemingly nothing “crackling” in the INCI. Probably the propellant plus a semi-stable foam which causes implosions?

I think in the formula I posted that’s the case. Trapped propellant in foam. But in the one I tried I swear it didn’t feel like that. I can’t really explain it, but you felt the pressure from the crackling, kinda like popping bubble wrap, where as trapped propellant in simple foam would just pop the foam bubbles and feel idk, weird ::smiley: . Plus, it wasn’t all that foamy to begin with, more gel/silicone like and not a lot of foam as to trap any propellant gases.