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Tagged: capb, cocamide-dea, sles, surfactant
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Best ratio for SLES, c DEA, CAPB
Posted by Abdullah on September 3, 2020 at 4:14 amWhat is the best ratio between these three surfactants for maximum detergency, foam and mildness?
SLES, cocamide DEA, CAPB
Kunal replied 3 years, 9 months ago 6 Members · 15 Replies -
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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@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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@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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