BTMS 25 emulsion became very thick during mixing. Why and how to avoid it?
I made this sample
BTMS 25 2%
0.1% tetrasodium EDTA0.3% citric acid to pH 4
A) water phase was heated above 70 °c and oil phase was heated until melted ( didn’t check the temperature of oil phase as it was too small amount.
I was using 1kw stick blender to homogenize this 400g sample batches
When i added oil phase to water phase, in less than 10 seconds it became so thick that my mixer wasnt able to mix it any more.
Then i made another sample. This time 1% BTMS and 0.5% GMS . upon mixing the phases it again became so thick that my mixer wasnt able to mix it.
C) then i made another batch, this time 2% BTMS 25 was added to water phase. Upon mix5i two phase it again became so thick that it was not mixable.
To this thick batch i then added 6 drops( ~0.02%) of apple fragrance oil and mixed it with spoon, it became soft and thin so i was able to properly homogenized it, added preservative and it is stable since yesterday. It is currently a medium viscosity lotion.
My questions are1. Was there any problem with my mixing technique that it because thick before homogenization or BTMS need any specific mixing technique?
2. is it normal for BTMS to make such a thick product even at 1% BTMS 25+0.5% GMS emulsifier?
3. Why it became so thick before homogenization and when it was hot so i couldn’t homogenize it?
4. Any suggestions on how to work with BTMS 25?
i know i can find a lot of formulas on internet with preparation methods but in my experience those formulas don’t work, even those from reputable big companies. So that is not and option for me to learn it.
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