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Sharing any knowledge about emulsion
I will share some information about emulsion and I want to know more and more about it so please share any information :
1) making the same formulation of cream : just changing (cetearyl alcohol to cetyl palmitate to stearic acid) “with same level”
*As result, the formulation with cetearyl alcohol is the best for viscosity and texture.
*Stearic Acid gives very near viscosity but with lower texture (lower smoothing)
*Cetyl palmitate gives too thin emulsion.
I guess may a combination will give better results? Any one try to make some combinations and compare with cetearyl alcohol alone (it needs a lot of work the combination and synergy. I will do it when I collect more information and find time…)
2) For required hlb, i find always two groups, one says it is not important and another says it is . Personally I’am with the group who says it is not important because with same oils and level changing the hlb of my emulsfiers I did not get really important challenges. Or maybe I get better result when decreasing the hlb of emulsfiers comparing to required one, any add or comment?
3) when using cetearyl alcohol in emulsion, its level will be calculated as emulsfier, oil or no one?
As exemple if we have 5% cetearyl alcohol, 10 % oils, 5% emulsfier so
* the total amount of emulsfier is 10% and 10% oils
* the total amount of emulsfier is 5% and 15% oils
* the total amount of emulsfier is 5% and 10% oils.
4) I read a lot about the effect of mixing speed to emulsion’s viscosity. Almost it says that increasing the speed will increase the viscosity of emulsion however in practice in my case the rule wasn’t true. (maybe because of shear rate parameter?) Any experienced expert tell us and especially explain the effect of shear rate and speed mixing to the emulsion’s viscosity ?
5) Always we talk about noewax 165 as from best emulsfier, however my experience shows that it has not good resistance versus Sensicare c1060 because adding this preservative makes an important drop in viscosity to emulsion . Anyone have similar experience?
@Abdullah @Aniela @Perry44 @Paprik @chemicalmatt @Cafe33 @ozgirl @ketchito @Graillotion @PhilGeis @Pharma @ngarayeva001
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1 Reply
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2. not important
3. As emulsifier when used with another emulsifier
4. First high speed then slow speed
5. Yes phenoxy reduces viscosity
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