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Emulsifying and blending properties and advice.
Hi guys.
I’m new here and wondered if you could please help .
I am currently developing a product which is made up of a combination of natural and synthetic ingredients.
Ingredients are:
92% Dionised Water
3% cross-linked polymer
3% Isopropyl Alcohol
1% cosmetic grade scent oil
0.75% Emulsifying Wax
0.25% Paraffin WaxI wanted to ask for some advice on blending these as I use the below techniques but getting inconsistent results, slight foaming or separation once fully cooled and left to stand
Melt the emulsifying wax and paraffin wax at around 80c.
Add cross-linked polymer at same temp.
Mix on 800rpm on the hotplate stirrer for around 10mins.
Add Dionised Water and bring to around 80c also.
Add scent oil and colour.
Leave mixing for around 10mins more.
Start reducing temperature and add IPA.
Take of heat and pour into a bottle at around 60-70c and leave to cool and settle .
I assume this would make it an W/O mix rather than a O/W mix?I did try to introduce some 1000cst dimethiconepolysiloxane in to the mix to reduce the foaming but this didn’t seem to do much.
What I’m aiming for is a very low viscosity, easily sprayable, easily spreadable product also retains the hydrophobic properties of the cross-linked polymer when combined with the paraffin. What I’ve produced so far works in terms of the effects of the product so assume it is the blending technique/method at fault but could be something else of course, every day is a school day as the saying goes .
Any help will be really gratefully appreciated.
Many thanks.
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7 Replies
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Isopropanol (and ethanol) is the kiss of death to most emulsions.
1% fragrance oil is a large excess.
It is almost impossible to have a W/O emulsion at that level of water (92%).
Very unusual mixing technique and formulation. Is this your own idea?
What is the function of the product?
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Hi.
Thanks for taking at look at my issue.
The actual product is a gloss enhancer/protectant spray for cars, which may seem strange I’m asking for help in this group but a lot of these types of products use ingredients commonly found in the cosmetic/hair industry (natural waxes/cold pressed oils etc) so a lot ingredients and blending techniques can be carried over.
I already make natural waxes to great effect but sprays and emulsions are new ground for me.
IPA is used as a dispersant to help the product evaporate as its spread to result in a simple final buff across. So would you suggest another solvent in the blend?
Would you suggest a different blending technique and I guess based on what you have said that I’m producing an O/W emulsion as water is such a high volume?
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The aim is to produce a product with as low viscosity as possible that enhances gloss/shine but provides a hydrophobic protective layer/water barrier .
If it is also useful to know, as well as the emulsifying wax I have other emulsifiers available in the form of Glyceryl Oleate, Ceteareth-20 and Polysorbate 80.
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emulsifying wax contains at least one high HLB surfactant (polysorbate 60 among others), so it’s impossible to form a W/O emulsion with it
the relative volumes of the oil and water phases are irrelevant - the nature of the emulsion depends entirely on which emulsifiers are used
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There should be a group somewhere similar to this, that specialises in applications for use other than personal care. It seems to me that you could get some mileage out of silicones, and a surface modifier such as Polyquart Pro A.
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You might want to look into Pemulen TR-2 as an emulsifier, thin the wax with mineral spirits/volatile hydrocarbons, and dump the emulsifying wax, fragrance and alcohol.
Another option would be to check out the Dow HIP products:
http://www.dowcorning.com/applications/search/default.aspx?R=3034EN
http://www.dowcorning.com/applications/search/default.aspx?R=1754EN -
Check Dow Corning automotive care, there are endless formulations and suggestions. How about mixing a silicon gum in volatile with little phenyl trimethicone for shine, can be made sprayable.
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