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Emogreen L15 volatility
Hi Im trying to find an alternative to volatile silicones. I really want it to evaporate, even if it takes a couple of hours.
Does anyone know if emogreen L15 is volatile? according to the data sheet, BP is listed as 240-270°C so Im not sure
other volatile recommendations?
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6 Replies
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Emulgreen L15’s INCI is C15-19 alkanes meaning that some molecules in there does evaporate but rather slowly whilst others nearly don’t.Pentadecane (C15) is liquid at RT and has a high vapour pressure which, like essential oils, lets them evaporate well below its boiling temperature.The other end of the mixtures spectrum is nonadecane (C19) which is solid at RT and has a very low vapour pressure, it does not really evaporate but feels dry (because it’s solid).If you’re looking for faster drying and full evaporation, go with undecane, dodecane, and/or tridecane (C11-13) which evaporate fast and dry quickly or isododecane which has about the same vapour pressure as ethanol and takes longer to fully dissipate. Notably, C4 and C5 have lower vapour pressure but still evaporate.What all these molecules have in common and what seems contradictory to volatility is a high boiling point well above 200°C (if memory serves me right). The reason which greatly contributes to their good volatility is small molecular weights and low intermolecular interactions. Meaning, the lower the number in their INCI name, the faster they evaporate. -
Im guessing lower viscosity grades also mean, a higher % of lower molecular weights=higher evaporation rates?
Thank you for your answer
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I have had great success with the undecane/tridecane combo (Cetiol Ultimate) that Pharma mentioned, as a direct replacement for volatile silicones
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Pharma said:Emulgreen L15’s INCI is C15-19 alkanes meaning that some molecules in there does evaporate but rather slowly whilst others nearly don’t.Pentadecane (C15) is liquid at RT and has a high vapour pressure which, like essential oils, lets them evaporate well below its boiling temperature.The other end of the mixtures spectrum is nonadecane (C19) which is solid at RT and has a very low vapour pressure, it does not really evaporate but feels dry (because it’s solid).If you’re looking for faster drying and full evaporation, go with undecane, dodecane, and/or tridecane (C11-13) which evaporate fast and dry quickly or isododecane which has about the same vapour pressure as ethanol and takes longer to fully dissipate. Notably, C4 and C5 have lower vapour pressure but still evaporate.What all these molecules have in common and what seems contradictory to volatility is a high boiling point well above 200°C (if memory serves me right). The reason which greatly contributes to their good volatility is small molecular weights and low intermolecular interactions. Meaning, the lower the number in their INCI name, the faster they evaporate.I have been fascinated with the ‘canes’….but have been unable to work with them. Due to living on a rock in the middle of the Pacific, everything must be air freighted in….and so anything with a low flash point, I can not acquire (without moving mountains).
Does anything have these properties, with a higher flash point (I know….counter intuitive), that I could work with it?
Is there a combo like Cetiol Ultimate, that some sort of synergy magical raises the flashpoint? :p
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@Graillotion You can’t raise the flash point by mortal means but have to use black magic. Alas, that one is not approved for cosmetics ;( .@@natiyo123 Partially correct. Good enough for a cosmetic everyday situation.
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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!
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