[natiyo123]

sodium lauroyl lactylate is a solid surfactant that also acts a moisturizer and has some antibacterial properties. Theres similar surfactants like this.

[natiyo123]

MattTheChemist said:

I have had great success with the undecane/tridecane combo (Cetiol Ultimate) that Pharma mentioned, as a direct replacement for volatile silicones

Sounds like an ideal option, but I cant seem to find it in México where Im located. Fortunately, I found an Inolex distrib.  Im going to try lexfeel wow (C13-C15 alkanes) 

Thanks everyone!
 

[natiyo123]

can ethylhexylglycerin be used in anhydrous formulas? 

[natiyo123]

Im guessing lower viscosity grades also mean, a higher % of lower molecular weights=higher evaporation rates?

Thank you for your answer

[natiyo123]

BC performance can be affected or even dont work at all if you mix it with other surfactants

[natiyo123]

very thorough explanations,

thanks for the answers

[natiyo123]

Hi, usually these sticks are made with MPG or DPG, to avoid the irritation you can add more water and add more preservative/antimicrobial to compensate increase of water 

check out this patent they list a variety of ingredients to be used for a gel stick deodorant 

https://patents.google.com/patent/US9307821B2/en

[natiyo123]

you mean another gellant or solvent?
 
I made one with glycerin, it works

[natiyo123]

also , every once in a while you can find good stuff in mercado libre 

[natiyo123]

hola, yo tambien he estado buscando vendedores de quimicos a menudeo para hacer mis prototipos

Depends where you live, best one Ive found in NL: Chemico

also check out: conjunto lar, cientifica jalmek (mostly analytical grade but can work for prototypes)

also some companies are nice enough to give free samples

[natiyo123]

Bill_Toge said:

lauryl glucoside is not an effective emulsifier, you’d be better off removing it

also, an emulsion can’t be W/O if it has a high HLB emulsifier in it; thermodynamics favours O/W by any means possible, and W/O only forms if there’s no possible way for O/W to form, i.e. no high HLB emulsifier

My main emulsifier is sorbitan stearate which has a very low HLB, I added a little bit of lauryl glucoside because I noticed when I added the hot water, the mixture became very lumpy, and after I added a small % of LG it became smooth again, I imagined it worked bc the HLBs added together to match the overall required HLB value??? Im gonna try some samples again with no lauryl glucoside and maybe Ill use my food hand mixer to try and get smaller droplets…

Is there an easy way to know how much water I should add? or should I just run tests and see

[natiyo123]

add*

[natiyo123]

letsalcido said:

@natiyo123 I’m also newish to formulating, and have slowly come to learn that w/o are a pain in the butt.

If you’re not married to the idea of making the deodorant as a W/O or O/W emulsion (not sure how o/w would work as a bar…) you can go the anhydrous way.

I make my own deodorant with Propylene Glycol and 3-5% Sodium Stearate. This will create a clear bar, and you can use that as a vehicle for your actives and build upon it. You can use lauryl glucoside to incorporate some oil into the bar as well, if you’d like a more emollient feel. It would also probably be cheaper than using waxes and oils. This is a super common formula/base for deo sticks.

You should also be able to use water and PG for the same bar formulation, but I haven’t experimented to see what the ratio should be so it is stable and doesn’t “sweat”. PG is cheap so I’m not worried about using that only.

Otherwise, like Perry mentioned, it would be best if you can share your full formula.

After thinking about it I wanted to ask… do you think if I add a vegetable oil, would it saponify?? Should I added it at the end (cooling stage) mixed with the fragances??

[natiyo123]

Dr Catherine Pratt said:

You can add Tribehenin to combat syneresis 

thanks for the suggestion… I see its structure is quite interesting!

[natiyo123]

EVchem said:

W/o usually requires homogenizing so with just a stir plate I don’t think that route will work for you

yeah I imagined, smaller droplets would increase stability… Cant do that at this moment, maybe Ill have to get rid of the water all together 

[natiyo123]

letsalcido said:

@natiyo123 I’m also newish to formulating, and have slowly come to learn that w/o are a pain in the butt.

If you’re not married to the idea of making the deodorant as a W/O or O/W emulsion (not sure how o/w would work as a bar…) you can go the anhydrous way.

I make my own deodorant with Propylene Glycol and 3-5% Sodium Stearate. This will create a clear bar, and you can use that as a vehicle for your actives and build upon it. You can use lauryl glucoside to incorporate some oil into the bar as well, if you’d like a more emollient feel. It would also probably be cheaper than using waxes and oils. This is a super common formula/base for deo sticks.

You should also be able to use water and PG for the same bar formulation, but I haven’t experimented to see what the ratio should be so it is stable and doesn’t “sweat”. PG is cheap so I’m not worried about using that only.

Otherwise, like Perry mentioned, it would be best if you can share your full formula.

Thanks for the suggestions, yes I have tried sodium stearate too, I tried to recreate TOM´s natural deodorant at one point, I will definitely keep this in mind.  

[natiyo123]

Perry said:

To get helpful answers you should list specifically what is in your formula.

o Sorbitan Stearate
cetyl alcohol
caprylic/capric triglycerides
water
castor oil
fragance
rice wax
lauryl glucoside
citric acid

[natiyo123]

Surfactants can be tricky to work with, learned from my own experience…

I would try this process instead if I were you:

Process:

1. Add Xanthan Gum to water.

2. Heat

3. Blend together.
4. Blend Oil + lecithin (oily phase)

5. Add oily phase while blending.

6. Add preservative when cooled.