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Aqueous Hair Powder
Has anyone ever had any success in using Evonik’s “dry water technology” in producing a hair styling powder? The gist of it is using their hydrophobic silica grades to prevent the re-coalesence of water droplets, thereby turning your water (with PVP or similar dissolved in) into a powder. Trouble is I can’t seem to make it work, even following their formulations exactly. I think the problem may be the level of shear required, but any advice would be greatly appreciated
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5 Replies
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Don’t attempt it without a real lab homogenizer such as a Silverson or in manufacturing an in-line homogenizer. I did several products with that technology, including a Powder to Cream self-tanner. It can be tricky by Evonik offers a great deal of technical support in their documentation.
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Thanks! I have a silverson in the lab, but my issue has been in preventing the silica pluming out of the top of an open beaker - did you make/buy some sort of lid that the supports and rotating axle could fit through.
In manufacturing our vessel is fitted with a rotor/stator type homogeniser - do you know if this would be sufficient or is an in-line homogeniser essential?
I’ve tried to get in touch with Evonik about this - haven’t heard back yet, but good to know they offer a lot of technical support.
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The Rotor/stator will do the trick on the floor. I once saw a plant try to hit it as hard as they could with Lightnin’ Mixers with no luck.It was a while ago, but I believe that we added some of the fluid to create a slurry before homogenizing the final product. You are absolutely right. I had a Lab Tech hit it dry with a silverson. She was cleaning for a long time to get it all.
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Thanks very much - I’ll give the slurry technique a try!
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in my experience a coffee grinder works well on the lab scaleon an industrial scale an airtight high-speed mixer, e.g. a Robot Coupé Blixer or similar, should give good results
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