ketchito
Forum Replies Created
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The ones we use in water-based cosmetics for instance, have shorter chain lenght and have better solubility (like in soaps), which helps with the process.
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Just outbof curiosity, why would you use a cationic silicone in a skin leave on product? They were made to resist the rinsing process in hair care products, and they are for sure more expensive than non charged silicones….I’m just curious.
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Centrifugue in these type of systems is not the best predictor of stability. You need to put your sample in the oven for few months. Now, gums will peel when dry. You either change your system (emulsion) or accept that they will peel. Pentylene glycol (and other glycols) humect the gum, but there’s just so much you can add before the stickiness kicks in.
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Hi. Amodimethicone is not water soluble. Some ether silicones are water dispersible, but that’s about it. They are large molecules and unlike water soluble polymers, they don’t have enough polar groups to hep disolver them. If you’re making an emulsion, I wouldn’t worry for oil compatibility. If your base is anhydrous, then you need to check its solubility on your base (esters and silicones can be combined up to some limit).
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Keep in mind that sebum is a semi-solid, and caiclium ions are water soluble (at least partially). You need them both to be in the same phase for a reaction to occur.
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For that you need a chelant. Inorganic ions tend to attach and detach in solution, but chelants bind strongly to ions.
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The problem with calcium as with any other divalent ion, is that it coils the anionic polymer or at least, doesn’t let it expand, impairing the hydration process. Monovalent ions like sodium don’t do this and also easier to be exchanged for another cation.
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@Rav Proteins are mostly insoluble, so you shouldn’t have any problem to separete them from glycerol. I believe you might have peptides (hydrolyzed protein). There are ways to coagulate them. The one I remember is making them react with cationic surfactants, but I don’t remember how to remove cationics after, I need to check.
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You could use cationic surfactants or make a LGN like P&G does. Nevertheless, you won’t get the same performance as with cationic polymers + silicones, and they former are usually added to the latter to improve performance. Plus, they are more advanced and very hard to formulate.
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They have a detrimental effect on hair, that’s one of the reasons why we use chelants. Take a look at this article: https://pubs.acs.org/doi/abs/10.1021/acsabm.8b00386
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Is it a commercial product or raw material that you want to remove the protein from? If it’s an extract where glycerol is the solvent, then you might not have any valuable protein or to be more precise, peptide fraction to recover (proteins are mostly insoluble, that’s why suppliers hydrolyze them first).
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If you want to use a solvent like Dipropylene glycol, you need to add it at a higher dose. I’m not sure trietyl citrate would do anything at such a low level. If you don’t have silubility issues, you can remove your xylene sulfonate since it can impair detergency and viscosity. A chelating agent if especially usefun in dishwashers…and if you want more foam, you could replace either SLS, CAPB or CDEA for an amine oxide. To boost detergency and viscosity, an inorganic salt can be added (if your system doesn’t get turbid).
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Because in solution, you’ll have free chrolide and sodium ions that could interact with polymer’s ionic groups, shielding them.
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If the formula is settled, the only thi g that comes to my mind is to clean first with some solvents, like mineral spirits, and then do as usual. Now, this is not environmentaly friendly of course ????
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What other ingredients do you have? If you don’t mind using something like Tinogard TL, it might help stabilize your vit e towards UV.
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Hi! Polyquaternium-10 is a cationic HEC, and HEC can sometimes behave in a weird way with glucosides ????
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If sel fin marin is some sort of inorganic salt, then thatt might be the issue, since those opacifiers don’t get along with electrolytes. Try one batch without sel fim marin to confirm.
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Remove glycerin. Reduce shea butter to no more than 1%, and BTMS 85 to no more than 2% (as mentioned, it helps having some fatty alcohol like cetearyl alcohol starting at 3-4%).
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Try removing Polysorbate-20 (soemtimes your surfactant system is enough) and Aloe Vera Extract.
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They might be using Carbopol 674 (https://www.ulprospector.com/es/la/Cleaners/Detail/11384/35242/Carbopol-674-Polymer). I don’t think gums you mentioned could resist an oxidizing agent.
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Carbopol® 674 polymer is a lightly crosslinked polyacrylic acid polymer powder. This polymer provides suspension at low product viscosity and improves f...
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Could you make one run without Decyl glucose and Glucose sorb?
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Yes, but that pH would compromise the stability of your peroxide.
As for the viscosity, chances are you’re not using the right rheology modifiers, and the peroxide is attacking it. There are some grades made for oxidizing bases.
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Since it’s a w/o emulsion, are you adding the water phase very very slowly? Also, w/o emulsions require some inorganic salts for stabilization.
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@abdullah Sorry for the late reply. Phenoxyethanol is fairily soluble in water at the usual dose in cosmetics, so you shouldn’t have any issue to add it at any time, unless your product got too thick during cool down. When added in the cool down, since emulsion packaging is alrrady tight, it’ll go to the free water which is where you need it most, and part will find its way also into the micelles (that’s why you usually experience a viscosity drop).
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For instance, if you use calciul chloride, in the presence of a cationic polymer, calcium ions won’t interact directly with the polymer, but it’d be chloride ions since they have opposite charge to toe positive ones in the polymer. As I see it, chloride negative charges will attach and detach in solution like any other monovalent ion, without any detrimental effect. The problem would be if you add an anionic surfactant, since calcium ion would compete with the polymer to interact with the anionic surfactant.