ketchito
Forum Replies Created
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@Fung One of the main limitations of the HLB system is that it was basically made for non ionic ethoxylated surfactants. As you see in your calculations, there are things not considered that actually contribute to the hydrophilic character of the molecule (like the presence of an ester group or the ether groups that don’t come from ethylene oxide. Calculations of HLB system outside the group of molecules it was created for gives you no complete info.
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@Av3553 Yes indeed, you’ll need to increase water percentage by the same level of the glycerine you replace.
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@Av3553 For a rinse-off product, you’re better off without glycerin. Remove it, and you’ll be able to reduce SLES and Betaine, and still get that gel phase.
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@RobboAU Then I misunderstood your comments, my apologies. Anyway, I’m glad it was all helpful at the end
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@RobboAU I don’t think I made a disrespectful reply to your comment, and I didn’t know one can’t make a mistake without being mocked, but well, you always meet different types of people.
My comment was correct, except for the molecular weight of the Dimethicone 350 (wrong source of information, my bet). And as @Pharma mentioned, there’s no linear correlation between a polymer’s viscosity and its molecular weight -# of repeating units, if we were to talk ideally about linear molecules- (there’s a relationship, of course, but not linear).
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RobboAU said:Dimethicone comes in various sizes, based on how many Si-O units it has.
D5 is as Graillotion described. D350 has 350 repeating units and is therefore much bigger. It does not evaporate quickly (if at all) when heated to normal process temperatures.
More Si-O units means bigger molecules, which trends with greater viscosity, higher boiling points and thicker aesthetics.
The 350 in Dimethicone 350 is referred to its (kinematic) viscosity -which is 350 cSt- and not to the number of repeating units. If you asume 350 repeating units, then your dimethicone 350 would have a molecular weight close to 27k g/mol, which is way higher than the value you can find from different suppliers, which is no higher than 300 g/mol.
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@GoldenFish What I’ve seen clogging parts of filling equipment are remains of structuring agents (like fatty alcohols) that were not properly emulsified.
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@filiz If ESANS if your fragrance oil, then you need to either increase the ethanol, or increase your solubilizer.
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@GeorgeBenson It’d depend on its lubrication power, but thos polymeric backbones are not to “flexible”. That’s why it’s prefered to use silicones, mineral oil, vegetable oils and esters for slip.
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@pas1kastora Did you try replacing the stearate by Cetyl alcohol? Check out this patent: https://www.freepatentsonline.com/4743444.html
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@enam Historically, conditioning shampoos use basically a mix of catonic polymers and silicones. Cationic surfactants are not common in shampoos because of negative interactions with the anionic surfactants (there are situations in which they can work, but it depends on the molecule and the ratio anionic/cationic).
Glycerin is a small and very water-soluble molecule, and will not do anything in a rinse-off product than remain solvated by the solvent (water) and go down the drain.
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@LeoCosm Your system might not support much salt, so you might want to add sodium chloride at the end (perhaps you might not even need it).
Also, lesve the pH at 6, to see if that fixes your haziness.
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@banyaboriforever Without knowing your formula it’s very hard to give a good solution. Are you sure those are water droplets? Any chance that might have been condensation?
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@crisbaysauli Did you check the solubility of your Potassium alum in water? Also, which type of water do you have? If there ions that have more affinity to sulfates but form a less soluble compound, that might explain your issue.
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@Ghita37 Soaps only exist at high pH’s.
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MarkBroussard said:@Pattsi:
Don’t forget the male market …. perhaps those products for men’s bald heads are multi-purpose
That one killed me
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@LeoCosm Hi. What is the question?
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@Nahlllailatul In the first method, after about 10-15 min, you could add some base (sodium hydroxide for instance), to help speed up the hydration process, and to ensure it was done completely.
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@Paprik Maybe 10% of CAPB is too much for yoir 1st system. I’d add guar first, 2% of CAPB (just to prevent coacervation), your SLAS and the the remaining CAPB little by little, till you have your desired viscosity.
The slimy consistency of your face wash, it might have to do with a change in micellar arrangement, you went over the rod-like micelles at that level of salt. Try to add it little by little, till you get the viscosity (and foaming) that you want.
Adding a non ionic, cationic surfactant or zwitterionic surfactant can modify the salt response (same as adding a cationic polymer).
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Some other new (im)possible trends:
- viagra for the microbiome
- botox for the microbiome
- microbiome affectionate products
- anti Blue/Green/Magenta and Fucsia light filters -
@vasant I believe that happens mostlye when you have a highly ethoxylated emulsifier. In any case, try to add that preservative in the cool down phase, so it can go to the free water of your emulsion.
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chemicalmatt said:@ketchito, nice thread! And merry, happy Christmas New Year back at you. How about taking that papaya with papain and starting an “Enzyme Revolution” in skin care? As for “free of”, I like “free of insects”. I’ve always wanted to add to a brand label copy “Do not use this product for evil.”
@chemicalmatt I definitely want to see that “Do not use this product for evil” printed on a label ????
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A verry troubled marriage, if I may…both having different ethics.
Calling this “new” type of products micellar is misleading (to say the least), since most cosmetic fluids had always had micelles.
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@MurtazaHakim If you read the list of excipients, they use Phosphoric acid, which means they protect the product by lowering the pH (probably below 5). Are you doing the same?
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@Fekher Solubilizers trap oils (like the ones in fragrances), so the more solubilizer you add, the more fragrance will be trapped in it (due to their partition coefficient), not letting the fragrance completely bloom upon aplication.
When you use a mixture of water and high quantities of alcohol (like perfumes do), you let your media generate enough solvency so fragrance ingredients are solvated rather than solubilized.