hi every body
I have formulated a w/o hand cream with sorbitan monooleate as emulsifier. I prepared it in 70 to 75 degrees centigrade with a homogenizer in 10000 rpm. the emulsion looks consistent at first but after about 1 month in room temperature the emulsion breaks down. how can i work with this emulsifier to obtain an emulsion with high shelf life?
tnx a lot
Comments
how much emulsifier?, what is the oil phase?, any gelling agents? the list goes on. Basically, show your formula as it is, otherwise no-one will have a chance to help.
the formulation of the cold cream consists of:
petroleum jelly
wax
preservative
sorbitan oleate
at the beginning the emulsion is OK and it passes centrifuge test (10 min in 3500 rpm).the cream viscosity is quite high but desired. but its shelf life is very low especially in higher temperatures. Changing ingredient percentage didn't work.
it would be my pleasure to hear your suggestions
What about adding lanolin?
there is no lanolin in it. all the ingredients are those written in former messages.
You should add in your emulsifying system polysorbate as well. caluclate the required HLB for the oil fase and than add 2-5% emulsifying system (polysorbate and sorbitan oleate) in your emulsion.
https://alchemy-ingredients.com/products/high-internal-phase-emulsions/hipegel-aqua/hipegel-aqua-1
all the discussions here raise another debate: if I reduce the amount of water, is the emulsion more stable? but actually it wasn't!!!
Making a stable w/o emulsion seems a little bit challenging. I will apply all of your recommendations and it will be my pleasure if you introduce other efficient emulsifiers for making HIPEs. (low-cost ones are more desirable)
thank you all.
Have you ever used ABIL® WE 09?
But add 3% isohexadecane... it gives very good stability to water in Oil emulsions.
I have made W/O creams with 80% water! It's just very important to add the water phase to the oil phase and not vice versa.
https://betaknowledge.ulprospector.com/6657/pcc-silky-smooth-creams-creating-high-internal-phase-emulsions/
Edit: I see it's already been mentioned. I overlooked the fact that only the last post is very recent.
Do you know Easynov? It can be used cold process!
https://www.ulprospector.com/en/na/PersonalCare/Detail/1432/103357/EASYNOV
Seppic products are great, but are expensive.
Did you use easynov for your cream?