ketchito
Forum Replies Created
-
I agree with @camel. Also, to help speed up hydration, you could add some base (like sodium hydroxide) after mixing HEC for a while.
-
Do you need to go that low in pH? Most shampoos have a pH between 5.5-6.0. CAPB has a better interaction with anionic surfactants at higher pH, so maybe that’s what’s causing your pH drop.
-
You can disperse the guar HPTC in water and then add citric acid to speed up hydration. Glycerin doesn’t hydrate guar HPTC but helps disperse it.
-
There are for sure different ways to achieve that rather than using this emulsifier, like using ceramides, glycerin, some fatty alcohol (that can be converted into long chain fatty acids), etc.
-
If N9 is nonylphenol ethoxylate, then that material is banned. I don’t know of any country that still allows it, but there might be, but it can be easily replaced by different aliphatic ethoxylated fatty alcohols.
-
I’d remove glycerin since it’ll kill the little forma you’ll have. Also, you have more than enough hydration from water, what you need to do is restore hair’s hydrophobicity. Also, your balance of methosulfate and fatty alcohol is a bit off. I’d use something like BTMS:FFAA 1:3 (as total active matter). That’ll make a more robust emulsion. I always had bad times using a cationic polymer in these type of emulsions, so check for phase separation in the oven. And also, manufacturing method is key (it’s not the same adding CAPB in the cool down process than at the start.
-
Manufacture conditions like the ones mentioned before, directly impact molecules difusion, collisions, orientation, packing, tansfer, water uptake, etc. And it all gives the final aspect of your emulsion. As a very general rule, high temperature, high mixing speed and time, and medium-slow cooling give you a very stable emulsion.
-
Got it. I recommend you to do a patent search. I’ve seen few where they describe both the composition and methodology. You can also find that info in few formulation books. In fact, more than the composition, it’s the methodology (especially the cooling process) what’s important for proper crystallization.
-
My apologies. I missed the part where it said it’s a car shampoo. There are a few very nice formulating books for that: Advanced cleaning products formulations, and Handbook of detergents part D: formulation.
-
Hi! I’m my country, government requires you to show stability studies to sell your products, and that’s done with at least a dedicated oven set at 37-40°C. That actually helps you check if there’s something wrong with your formula or not. You can also run some calculations to check if the amount and type of structuring agent is in good proportion with your emulsifier, to have a stable system, but at this point, the heat stability is needed for you. You can find second hand ovens for that purpose online.
-
Since your formula has many conceptual issues, it’d be better to get some more academic knowledge before continuing, so you understand what you need to put, what has no reason to be included (rather than a MKT story wich suppliers are very good at), and how to properly mix them. Without the proper knowledge, it’d be hard to know which information is reliable and which one is Just BS. There are a couple of good books to start with: Harry Cosmeticology, and Poucher’s Parfums and (I forgot the full name, but you’ll easily find it).
-
Could you be a bit more specific? There are many cold-process pearlizers that fit with your requirements. Also, different polymers to stabilize them, so it’d be helpful if you give a bit more detail about your issue.
-
While cetearyl alcohol, cetyl alcohol, glyceryl stearate and stearic acid are all structuring agents, I believe you’ll get a better lamellar phase using cetyl alcohol (that might be the resonancias why the Emullium you’re using has it as part of their formula.
-
It would be useful if you list your ingredients (no percentages needed), to see if something in there could be the reason.
-
You could try replacing some water by ethanol. You’d need to test to see how much you’d need.
-
For whatvI found out, Sodium deoxycholate’s pKa is around 6.2. That means that a pH of 5, you’ll have its acid form. Organic acids have a lower solubility in water than their salts, so maybe that’s your issue. Make a sample with a pH around 6.5-7.0 to see if that solves the issue.
-
It’d hard to give any advice without knowing what’s in your formula. You don’t need to write down percentages, but a list of ingredients would be helpful.
-
When talking about fats, you have fatty acids in there, so they add up to the mixture of acids that can be neutralized (some triglycerides can also be hydrolyzed to give fatty acids). NaOH will neutralize the stronger acids first. If you measure your pH and it’s fairly basic, you can assume most of your acids have been neutralized. In the case of LABS, I would aim for a pH coser to 9, to prevent drifting.
-
Do you experiencia the same level of turbidity at pH 5.2 and pH 4.0? CAPB could show some issues in the presence of anionics at very low pH, depending on your system. SXS has to be added in higher doses (like 1%, 2%, 3%), again, depending on your system.
-
NaOH is mainly used to neutralize LABS in dishwashers. Now, as an added benefit, it can neutralize fats to make them easier to remove.
-
I’d put it in the oven (37°C) for an hour or so. Do not excede this time since some components are temperatura sensitive. If you have a bath with ultrasound, even better.
-
I usually don’t bring info from suppliers, but you can check this two references from Stepan, for a Mg laureth sulfate (https://www.stepan.com/content/stepan-dot-com/en/products-markets/product/STEPANOLMG.html) and Na laureth sulfate (https://es.stepan.com/content/stepan-dot-com/es/products-markets/product/STEOLCS270.html#:~:text=Es%20tensioactivo%20ani%C3%B3nico%20es%20un,una%20variedad%20de%20aplicaciones%20agr%C3%ADcolas.). Both CMC and Surface tension are lower for the Mg laureth sulfate (don’t mind about the concentration of both, the studies are made at the same solids level). This shows the difference in detergency between both surfactants.
-
Hi! The right choice will depend on the type of product and the ingredients you’re using.
-
I will ask the obvious first: did you make a sample without any fragrance, and adjusted the pH below 6 without any viscosity loss? I ask this, since many acrylate-based rheology modifiers need to be neutralized in order to work, and the lower the pH, the less neutralized polymer you’ll have in solution (and the lower the viscosity).
Now, 2% of fragrance is a lot! Even 1% is quite high for a body wash. You could of course pre-mix it with a solubilizer prior to adding it to your main batch (polysorbate-20 or PEG-40 HCO), but I’d check first if the low pH for your product is what’s causing the viscosity drop.
-
From the picture you showed, it actually looks like foam, but after few days, that foam should have ceased already. Could you put your sample in the oven for few hours, to kill the foam and see if there’s actually a top layer of separated product in your bottle?