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Olivem 900 Failed Emulsions
Hi,
I would really appreciate if someone could help me with my problem with these failed experiments with Olivem 900 (Sorbitan Olivate). I made 9 experiments and none has properly emulsified.
Experiment 1-4 Formula (2 with 0.5% salt and less 0.5% Water) 50g each:Water 49.68%
Glycerin 3%
Citric Acid (as chelating agent) 0.02%
Preservative Eco 0.8%Olivem 900 6%
Cetyl Alcohol 2%
Cocoa Butter 7%
Coconut Oils 30%Orange EO 1%
Vitamin E 0.5%Mix water + glycerin + citric acid, adjust pH to around 5, add preservative eco, adjust pH to about 5.3. Heat both phases to 75°C. Drizzle water phase into oil phase in a stream and emulsified with a Bamix mixer. Emulsion didn’t come together. Didn’t get to cool down phase. I observed that perhaps the quantity was not enough for the Bamix homogeniser to do its job. So trial 5 and 6, I increased the quantity to 100g, the result was slightly better than 1-4, the 2 phases were emulsified but was very watery/fluid and could see traces of separation. I homogenised the emulsion for more than 1 minute with the Bamix and stir till cool down to 35°C. Left it for an hour and the emulsion started to separate.
Experiment 7, I changed the formula and tried it at 100g:
Water 35.98%
Glycerin 3%
Citric Acid 0.02%
Salt 0.5%
Preservative Eco 1%Olivem 8%
Cocoa Butter 10%
Coconut Oil 40%Cool Down Phase: 1.5% (Vitamin E 0.5%, EO Cedarwood 1%)
Same method as above, emulsion was water/fluid. When it cooled down to 32°C, the emulsion thickened a little but it was still fluid, and I could traces of (water or oil) around the rim of the emulsion.
Experiment 8, I reduced water by 10% and increased coconut oil by 10%, consistency was slightly better but still quite fluid but there are no traces of water/oil around the rim.
24 hours later, both experiments 7 and 8 are still fluid.Experiment 9, also 100g, formula:
Water 30%
Glycerine 4%
Salt 0.5%
Preservative Eco 1%Olivem 8%
Shea Butter 10%
Sunflower Oil 45%Cool Down 1.5% (Vitamin E 0.5%, EO Cedarwood 1%)
For experiment 9, same method of formulation as above, except that I let the Bamix run for 2 minutes. Result is the same, watery emulsion with traces of oil/water around the rim.
Sorry for my very long post but I wanted to get as much detail down as possible to make it easier for whoever will help me. I have made various adjustments, adjusting the pH of water phase before adding preservative, increasing oil phase, increasing mixing time, removing citric acid etc but still, it doesn’t work.
I hope someone can shed some light please.Thank you!
Mary Lau
Experiment 7, 8, 9 in descending order
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