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Best ratio for SLES, c DEA, CAPB
What is the best ratio between these three surfactants for maximum detergency, foam and mildness?
SLES, cocamide DEA, CAPB
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15 Replies
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@Abdullah That would actually depend on your system. But as a starting point, I remember the best interaction (synergy) of SLES/CAPB is around 3:1, and of CAPB/DEA around 2:1. I actually found a brochure for Amidet N (which is very similar to Cocamide DEA) where the best foaming effect is achieved at SLES/CAPB/DEA 3:1:0.5 (https://www.kaochemicals-eu.com/sites/default/files/dz/amidetr_n__in-cosmetics12.pdf).
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@ketchito very interesting information, thanks for it.
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@ketchito thanks
Appreciated
I like to find files and comparisons like this. Where can i find more? -
@Abdullah You can check a couple of very nice books: “Liquid detergents” and “Handbook of detergents part E: formulation”. There are some sites where you can download them for free like Genesis library.
You can also find papers like this one: https://www.researchgate.net/publication/7756634_Mixed_Solutions_of_Anionic_and_Zwitterionic_Surfactant_Betaine_Surface-Tension_Isotherms_Adsorption_and_Relaxation_Kinetics. Seach for the terms “synergy” and “mixed surfactants”.
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@ketchito thanks
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@Abdullah I know there is a 6: 1: 1 ratio too, but I’m not sure. When I study a SLES free formula , I was told that I had to transfer the SLES ratio to other components.
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@filiz thanks
I will try this ratio and compare it to the one Ketchito said -
@ketchito.. Hi
I have tried the ratio of 3:1:.5, the shampoo is getting good thick and seems like no way to add salt.
Is adding salt mandatory to solution?
How can I reduce the viscosity now? -
@Kunal adding salt is not mandatory, reduce viscosity can be done with deferent way I guess the best is making sample for low quantity as example take one kilogram make dilution with stiring then stop when you reach acceptable viscosity if your product is fine then no need to add correction else add some ingredients to improve It, repeat this process until you get what you want.
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I also found that after preparing shampoo it’s becoming gel in few days when kept in open , how can I stop that.
Do we have to store in air tight
Container just after completion so that it won’t become gel. -
@Kunal The ratio 3:1:0.5 thicks very well, but it brings you very close to a gel point. A way around is increasing the relative content of the anionic (eg., 4:1:0.5). Also, these type of products when left in an open container, tend to gradually lose water, that’s why you see it becoming a gel over time.
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ketchito said:@Kunal A way around is increasing the relative content of the anionic (eg., 4:1:0.5). Also, these type of products when left in an open container, tend to gradually lose water, that’s why you see it becoming a gel over time.
This is what I’ve gone for in my trials and that’s working nicely and repeatably.
Agreed with your point about water loss and subsequent gelling - @Kunal you can see this first hand. Make a batch of your shampoo and squirt a little into a weighing boat and leave it out in the open. Give it a stir the next day and it’ll be thicker. A stir the following day and thicker again. You could go one more than this and weigh at intervals to see how much water loss has how much of an impact. -
@Benz3ne.. Hey.
So best way to maintain the viscosity is to keep the solution in air tight container. Right?
I also found that shampoo which I have kept in the small bottle with screw cap pack in the month of Feb (before lockdown) almost lost 20% volume after lockdown (July).
So the best way to minimize the water loss might be to package it sealed.
Is that right? -
Kunal said:@Benz3ne.. Hey.
So best way to maintain the viscosity is to keep the solution in air tight container. Right?
I also found that shampoo which I have kept in the small bottle with screw cap pack in the month of Feb (before lockdown) almost lost 20% volume after lockdown (July).
So the best way to minimize the water loss might be to package it sealed.
Is that right?Hey my friend. Yes, absolutely. Although, I’m surprised that it lost 20% over 5 months in a small bottle with a lid on, regardless of it not being air/water-tight.
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Hey
I am using 75% dm water in my shampoo and 85% in lotion, keeping these percentages in mind how much percent dmdmh shall I use in both.
Thanks in advance
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