chemicalmatt
Forum Replies Created
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Behenyl quat emulsifiers such as BTMS are very mild on the skin, have low irritation indices, and get overlooked in skin-care all the time. I see no worries. Happy formulating, dude.
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Folks: this IS a L’Oreal (Garnier’s parent) thing. They add their reference # to the labels quite often. Ignore.
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Many thanks, David! A merry Christmas to all of us!
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More to the point, even before Gunther weighed in, I wondered how did you get around that Henkel patent? I am curious about that. Oh and yeah, drop the behenyl quat for sure.
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…what Mark said…and then some. The veteran chemists in this blog could collectively author a textbook on the many modes of and tools and uses for mixers and how these variations perform with different formulations, circumstances, colloidal additives, etc, etc, etc, IS the speed important you ask? As so often the case: depends on the application. Try and see.
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That material is promoted as yet another offset to low MW dimethicone, for those who cannot stomach silicones as emollients. Try a branched alkyl ester instead. Save some money too.
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Zero difference. If it is an alkaline soap then use tetra-sodium EDTA.
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Lola, it is “benzoyl” peroxide you are looking for, right? The one used in acne remediations? Call up Essential Ingredients and inquire. I cannot remember the trade name , but the 50% solution is standard. Sigma-Aldrich is OK, but you will pay a premium for it.
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10% disinfectant??? You are going to kill a lot of fish with that formula, my friend. Pine oil itself has disinfectant properties, by the way, but if you have to use a terpene-soluble agent, try p-chloro-m-xyenol.
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In the USA you have up to a year to use your obsolete label copy packaging unless what you added is a certified color or other regulated ingredient.
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You are far better off using only plastic (HDPE or PP) double-diaphragm pumps for contact with body-care products if you cannot afford sanitary stainless steel 304 or 316. Aluminum DD pumps are used industrially to pump mainly oils.
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Hanyo, try adding a small level of lecithin (<0.50%) to this and you should see little or no blooming.
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I like isoamyl laurate, and it is relatively inexpensive. Money not an issue, then daikon radish seed oil (Charkit) is the closest I have found to a natural alternative to low MW dimethicone or cyclics. Truly though, there is no substitute for silicone.
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Hey, Linus Pauling swore by the stuff, and he was Linus Pauling. Just sayin’
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Folks, ngaryeva is right in that 1000cst dimethicone works well in hair care, and is more available right now. That is because the most commonly used dimethicones in skin-care are 200cst or 350cst, both being in short supply right now. If I had to choose only one MW for overall “standard” use, it would be the 350. I’d like other chemists to weigh in on that one someday, it would make for a good discussion here.
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What is with the urea? Not needed there.
LABSA used was 96% commercial form?
Also, pH should be adjusted to 8.0 - 9.0 to truly make this “tried and true” my friend. Just sayin’ -
carpl, the commercial ratio is in the vicinity of 2:1 or 3:1 C16-18 alcohol to polysorbate 60, so yes: make your own emulsifying wax. Subbing Polysorbate 80 may not factor much into the outcome depending on the nature of your oil load. HLB is nearly same as 60, but there IS that olefin linkage to think about.
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If you are using HEC, and not heating, then it is wise to allow 60 minutes mixing time, then add a TINY bit of alkali (AMP-95, NaOH 1.0%, ) to swell. Then proceed as usual. However, if you have a LOT of electrolytes in there at that low pH, ChrisV’s recommendation is best, and dehydroxanthan works best when you are at really low (pH2.0?)
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Always.
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Lisa18, assuming you also have a chelating agent in there, and your Aw is < 0.75, Euxyl PE9010 is adequate at 1.0%, but even better is to use the blend that includes caprylyl glycol (Euxyl-???) I use the analog from Lincoln Mfg.: Lincoserve HpH-6.
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Wannabee, I cannot imagine any acrylate thickener holding up to that much divalent electrolyte. I never heard of K55R, can you elaborate? Your IR scan does show a strong carbonyl stretch at 1700, so there is that to ponder: e.g. acrylate it is, or polyacrylic acid or polyester?? Yeesh, might need to call up the manufacturer on that one! Plan B may to try a nonionic alkyl modified thickener like the Natrasol line has. This needs to be peroxide stable though, right?
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Nonionic emulsifiers in there? “Solubilizers and stuff” sounds incomplete.
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You mentioned it changed color upon aging, so that does indicate oxidative instability, no matter what. You also mention sunflower oil twice (??) Did you use high oleic (H.O.) sunflower? If not, there is your problem. Also, not all tocopherols are same as anti-oxidants. Use Coviox T-50 (BASF), which is mixed tocopherols, for best results. Even better, use rosemary oleoresin.
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IF you can live with some little benzyl alcohol or phenoxyethanol in your formula, those two will increase SalAc solubility and are miscible with PG too.
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TO reduce “sticky”, or tack, just use butylene glycol. Cheap, safe, more effective than those two diols you mentioned. Also, BG is no more or less moisturizing than the two you mentioned, meaning very little.