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Making aqueous formulation dry fast on skin…..
I have made two formulations :
- a 100% aqueous body spray
- an o/w emulsion based spray lotion (synthetic esters - PPG-15-SE/IPM/OP - as the oil phase).Both of them have more than 70% of water content with NO alcohol. Now the problem is due to such high water content it is not easily evaporated from skin and runs down too. I tried some surfactants (silicon based and PEG-HCO-40, Polysorbates) but none of them are working here.
I am thinking to use Veegum or Modified/Corn starches but not sure about clogging of spray nozzles due to viscosity increase and their colloidal structure….
Any suggestions and advises please?
Thanks!
Kamal -
6 Replies
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You are asking the impossible. Adding viscosifiers or non-volatiles to a solution will delay evaporation, not increase it.
The only way to increase evaporation rate is to use a more volatile solvent.
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Oh 😮 …. then I will try to proceed accordingly.
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Why don’t you try an aerosol for drying if you are happy with formula the way it is.if it runs add a small amount of rheology modifier for pseudoplasticiity?
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Hello DrBOB,
You mean instead of normal pump spray if I opt for propellant based aerosol type delivery then this may help in drying fast on skin? However in this case I am wondering how I would take trials on a small scale in a lab with propellant gases and cans….!
What rheology modifier you would suggest here?
Can you give any sample formula/recipe idea relevant to this case?
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Start with plain water, and see if it dries fast enough in your packaging.
Then, test a simulated aerosol using a system like this:
http://www.dickblick.com/products/preval-sprayer/?clickTracking=true&wmcp=pla&wmcid=items&wmckw=25003-0000&gclid=Cj0KEQjw-73GBRCC7KODl9zToJMBEiQAj1JgfyLuOQK0Xp1Cq55UtbzfNBubgvb8nt0JF8HcZCOEWIoaAlbP8P8HAQ -
This seems to be a very good option but unfortunately I am not in USA, I can’t source such Sprayer in my country…. :'(
Still will try…..
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