ketchito
Forum Replies Created
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Hi. What’s the pH of your product? Peróxido usually descompose faster the higher the pH. Just as a reference, a peroxide based stain remover has a pH of no more than 4.
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Hi. Could you write the proper INCI for Glycol cetearath? Also, it’ be nice to know at least how much of this and of Span 80 you’re using, as well as the amount of your oil phase and some details about your manufacturing process.
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Not the same case, but some emulsions that use both a more oil soluble and water soluble emulsifiers, have them molten in their own phase, to get a more stable emulsion. On that, if you have some fatty ingredients that you need to heat, I’d just add there your vegetable oil, especially if your mixer doesn’t provide enough shear.
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Remove dipropylene glycol. Solvents of this type serve no purpose in these kind of products, and can be impairing your viscosity.
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All polar solvents will cause the same issue to emulsions. Just add it with slow mixing (no shear) between 60-50°C. Since at this stage, your emulsion has some “memory”, it’ll recover…but don’t add it below 50°C.
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My name is Wilson. I have a BS in Chemistry and a Masters degree in Materials Science, with 15+ years of experience formulating cosmetics. I have an independent lab in Peru and I’ve formulated products for both local and international brands. I can take on any project related to personal care, specially hair and skin care. I’ll be glad to assit you in your projects!
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You can take this as a reference of approx percentages: https://www.ulprospector.com/en/la/PersonalCare/Detail/118099/6921068/Foamy-Shampoo-Bar?st=1&sl=391941483&crit=a2V5d29yZDpbc29saWQgc2hhbXBvb10gPiBGb3JtdWxhdGlvbnM%3d&ss=2&k=solid|shampoo&t=solid+shampoo
ulprospector.com
Foamy Shampoo Bar by THOR - Personal Care & Cosmetics
This solid shampoo is suitable for all hair types. With a fresh and clean fragrance, a lightweight application is enough to achieve a powerful and effe...
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Hi. Is this a 2 in 1 SH+Cond bar? For a shampoo bar, it has very low amounts of detergent and high levels of waxes and oils. This might not let the bar foam properly, and force consumer to rub it more than usual, and that would explain why it lasts so little.
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What you wrote at the start was actually your surfactant’s ASM:
10% SLES, 3%cocamidopropyl betaine and 2%sodium cocoyl glutamate and 1.5% decyl glucoside
Your formula in terms of surfactants it’s Ok. I’d suggest you to remove Glycerin (no real benefit in a cleanser) and Decyl glucoside (it’s a good degreaser, but it can be “too efficient” sometimes). This will give a good foam at the end (if you need even more, increase your SLES from 14.2 to 16.0%).
Now, for conditioning, 1% of your Amodimethicone emulsion is not that much. Since you mentioned you experienced some disconfort with it, I’d use DC 1785 (or similar) instead, which is an emulsion of Dimethiconol in TEA-dodecylbenzenesulfonate. Use 2% and up.
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As @chemicalmatt mentioned, it’d be nice to have full INCI names for your ingredients. If PEG-40 is PEG-40 hydrogenated castor oil, then your Polypropylene glycol won’t probably be enough to give thermal stabilization of your viscosity.
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I’d advise you to check the pdf version instead. What you see as two numbers, is just due to the use of two decimals in those numbers.
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I agree with @chemicalmatt. Also, it’d be useful to have more details on the process. For what I see, adding a gum after surfactants would not let if fully hydrate and properly interact with surfactants (I bet high mixing required to add the gum generated a lot of foam). I never had good experiences with xanthan gum in cleansing products (separation was always the issue).
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Boron is used to increase crosslinking of guar gum. This increases viscosity, and that’s why boron free guar HPTC gives less viscosity than its boron alternative.
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That’s a liquid dish soap, right? Put a sample in the fridge. If after few days that turbidity turns into a precipitate that settled at the bottom, then your sulfonate might me salting out. For that, you need to add some sodium xylene or cumene sulfonate. It’d also be adviceable to check before if there was any significant pH drift from when it was manufactured.
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Could you try removing potassium sorbate (you don’t actually need it in that formula)?
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You have lumps dispersing CMC because you’re adding too much. Start with 0.5% of CMC and only 1% of PG, drop your extract to 0.1%, switch the levels of CAPG and APG, and add CDEA as final ingredient. You’ll notice you’ll need less CDEA.
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You can make a solution of your Lactic acid, so it’s easier to measure the amount you need. Or perhaps you meant that because of the high viscosity of your product, it was hard to mix the acid.
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@Abdullah it’s bonding energy which is related to complex stability. Here’s a very good read on the topic: https://www.dow.com/documents/113/113-01388-01-chelation-chemistry-general-concepts-of-the-chemistry-of-chelation.pdf?iframe=true&.
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Please, add a preservative. I don’t think you’ll get too low in water activity not to need one(s). Many weak preservative systems (that when used in real life fail) pass challenge tests, so be cautious about those results.
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That is related to the energy of the newly formed bonds between the chelant and the metal ion when forming a complex. While citrate can form readily a complex with divalent ions, it can also easily lose it since the binding energy is not that strong. EDTA forms more stable complexes due to the higher binding energy.
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I actually haven’t found many Procter patents where they disclose the amount of citrate. I found this one though where it’s at 1% (which is still high): https://patents.google.com/patent/EP3522858B1/en
One thing I forgot to mention is that salts also help at some level, to stabilize the LGN.
patents.google.com
EP3522858B1 - Personal care compositions substantially free of sulfated surfactants and containing a gel network - Google Patents
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I believe they are talking about solubilizers rather than emulsifiers. Some solubilizers blended together have better performance than using only one, that’s why is common to combine them to solubilize, for instance, fragrances.
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There are many patents from P&G and Colgate, they both use carrageenan. Here’s an example: https://patents.google.com/patent/US4457908A/en
patents.google.com
US4457908A - Stabilization of carrageenan-containing toothpaste - Google Patents
A method for stabilizing a cosmetic composition containing carrageenan, specifically, a toothpaste, wherein microwave radiation, preferably in the 0.8 to 3 gigahertz frequency range, is directed onto the toothpaste so as to raise its temperature to at least the gel-sol … Continue reading
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You need to define what is safe (what toxicologist consider as risk and exposure). Consider that 1,4-dioxane not only is present in ppm, it is water soluble and volatile. So, it’d only pose a risk if you drint the product, but in normal cosmetic use, it’ll either go down the drain without having any effect for consumers, or will evaporate (in case of leave on products), again without any effect on consumers. On the other hand, soaps have not only a high pH but also free alkali, which impairs people’s lipid barrier (this has been shown in different studies). So, this is what toxicologists took into account to don the safety assessment. To the case of contaminants, unless you’re in a lab doing a controled synthesis, you’ll always have some byproducts. In real life, even the water you drink has contaminants (check some specs and you’ll be amazed), but they are at such low level, that they don’t pose a risk. On the other hand, pure deionized water will for sure cause nasty tummy issues. Just saying.
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Carrageenan is the usual choice