zetein
Forum Replies Created
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Are you washing with hard water?
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@ketchito Thanks. In my region neutrogena gives “three-dimensional micelle cleansing tech” claim but its footnote tells “which means the surfactants work with ‘acrylates copolymer’ forming a three-dimensional network structure”.Could probably be the polyethylene backbone and the lower aclohol residues are already hydrophobic enough to attract surfactant molecular. I guess.
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Does hydrophobic attraction works similarly? I remembered Johnson&johnson did something like this.
But in their ingredient lists its just called “acrylates copolymer”, not even “hydrophobically modified” like using fatty alcohol ethoxylates as side chains.
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You can’t. But you can see the auto-translation scrolling down that page.
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It has to be higher than 7 and a couple of buffers are needed.But why not just buy a bottle of calamine lotion？
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How did (Cetearyl Olivate and Sorbitan Olivate) work? Which one plays TEA-Stearate and which one plays Stearic Acid?They are two lipophilic morculars unlike traditional lipophilic+hydrophilic combination. And being derived from olive oil makes them very unsaturated, which would hinder lamellar crystalline structure.How ever it still became one of the workhorses for liquid crystal cream advertising.
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It seems all conditioners are based on quaternium surfactant + fatty alcohols = LGNs
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How does refatting agent like glyceryl oleate or peg-7 glyceryl cocoate or other water soluble esters work? It does give a different feeling and it’s advised to be included in the formula by many experts here.
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Now it’s even more confusing. A totally different list was given.
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Yes, I know it’s made of 4 different monomers. The first two are determined, so I skipped them in the original post.However the last two don’t make sense to me.In the file you linked, it tells:Acrylamide-Acrylamidopropyltrimonium Chloride-2-Acrylamidopropyl Sulfonate-DMAPASo the first two are certain.The third one:2-Acrylamidopropyl SulfonateIs it supposed to be a salt? If it’s a salt, why it doesn’t have its counter ion named? It should be Sodium 2-Acrylamidopropyl Sulfonate or others.What’s more strange is that if you go search exactly for 2-Acrylamidopropyl Sulfonate you won’t get many result, almost like it doesn’t exist. The more common monomer used for polymering is 2-Acrylamido-2-methylpropane sulfonate (in INCI as acryloyldimethyl taurate) which has an additional -CH3.Why would PQ-43 use the illusive one without -CH3, or in reality it’s 2-Acrylamido-2-methylpropane sulfonate that is used, all the data being erroneous?The last one: DMAPA, what does it stand for? If it’s dimethylaminopropylamine, how could it copoly with other three acrylate derivative?I would guess it shoule be yet another acrylate derivative dimethylaminopropylacrylamide? But why the data uses the ambiguous abbreviation only in this one.
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Biologique Recherche Lotion P50, an famous exfoliating solution with acidic pH like any other peel, contains niacinamide since 1970s, long before the claims for niacinamide became a thing in skincare products.
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@ketchito
Why is peg-80 sorbitan laurate used as surfactant in many formulas? Not just secondary, I’ve seen it listed right after aqua/water, and that product foams and cleans well. How does it stand out among its family? -
Could you give an example of a product that is hard to rinse and leaves slippery feel?
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Polyquaternium-7 or 39 are more commonly used in face wash. The latter gives a slightly more squeaky-clean feel.Cationic stuff binds to skin less than hair. It shouldn’t be causing problems.
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You need exfoliation. Exfoliation is King.
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Is it true ammonium system is harder to preserve than sodium due to extra nitrogen source?
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@chemicalmatt Why pearlizers don’t function as emollient and re-fatting agent, like other fatty acid esters do, in cleansing products ?
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Does it smell like garlic?
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I had read somewhere that all surfactant with ole-chain would tend to give a stringy feel. Not sure if it’s true or not.Oleic acid soap is famous for its stringy.
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Sodium Cetearyl Sulfate is very common.Alkyl phosphate or acyl methyltaurate is common too.
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(c) Calamine, 1 to 25 percent.(j) Kaolin, 4 to 20 percent.(o) Sodium bicarbonate.
(s) Zinc acetate, 0.1 to 2 percent.
(t) Zinc carbonate, 0.2 to 2 percent.
(u) Zinc oxide, 1 to 25 percent.These can also be claimed as skin protectant…But I don’t think they would reduce TEWL. On the contrary it can be very drying.
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It always have both charged sites at the same time, just one of them being (could be a lot, could be a little) more predominant.
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PEG-6 is PEG-300.PEG-8 is PEG-400.PEG-600 is PEG-12.