Abdullah
Forum Replies Created
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You can start from 1% and adjust it
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It becomes a big problem when making LGN and calculating moles of fatty alcohol.
There is a bit difference. Almond two time.
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@Perry Sorry but when i calculated the molecular weight of cetyl and stearyl alcohol from their atomic weight, it was 242.44116 & 270.49432 . Are you sure there is no mistake in your calculation?
Then some new questions.
1. Is cetearyl alcohol a new molecule by itself or just a mixture of two other molecules?
2. Why did you sum the molecular weight of cetyl and stearyl to get the molecular weight of cetearyl alcohol?
3. If in a formula we add 1% ceyl alcohol & 1% stearyl alcohol, would it be the same as 2% cetearyl alcohol 50:50?
In this lecture the instructor says molecular weight of cetearyl alcohol is 250, and it is the weight of cetearyl alcohol 70:30 if we calculate it from atomic weight. What is your comment on this one?
https://youtu.be/TYFDRkRclK0 -
<div>No it wasn’t from a supplier</div>
http://surfactantschemistry.blogspot.com/2013/07/laundry-detergents-formulation.html?m=1
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I saw in a book that 40% mono is more favorable in cosmetics but no comments on why.
I haven’t used 90% mono because i have to import it from another country and MOQ 25kg but i like too know the results of this change too.
There is one thing and that is just my assumption that di and thri doesn’t help with LGN formation so in 40% mono, only 40% of it will help LGN formation.
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Thank for this update.
I am confused with everything i do in forum right now but maybe because it is new.
Here are some of my suggestions that was better previously.
1. An introduction in front of the name of users to know better if he is a regular member, student, professional chemist, professional formulator and etc like before.
2. I made a post but i couldn’t upload a picture in it. Not in actual post, not in comment.
3. When i was adding tags to my post, it wasn’t suggesting previous tags when i was typing like it did before. This may create unnecessary new tags.
4. In “recent discussion” section, it only shows 5 discussions, if for example 8 new discussions has been started and i haven’t checked them, how should i know that?
5. How should i know in general, which discussions i have opened and which i haven’t.
Thanks again
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You need to increase dimethicone and guar
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Yes
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It doesn’t have negative effect but doesn’t have positive effect too.
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Maybe blending these emulsifiers improve skin feel.
SLS on it’s own is the harshest surfactant but i saw somewhere that a blend of SLS and SLES has better after feel than SLES or SLS alone.
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You are welcome
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SunilHiwarkat1965 said:@Abdullah, Thank you very much for corrections. I should have checked COA of the supplier. Truly a very big mistake.Abdullah said:Molecular weight of cetearyl alcohol 30/70 is 250.
Below 1:4 ratio the viscosity will be very low. 1:4-1:6 is best for viscosity and stability.
For each % BTAC 1.86% fatty alcohol gives you 1:3 molar ratio
Do you mean active BTAC ?
Would you pl.don’t mind to explain me the molar ratio calculations. I shall be very much obliged if you can spare some time.That will clear my basic concepts.
Thanks in advanceYes active BTAC surfactant.
Every one calculate it their own way.
I do it like this.Suppose A is emulsifier, B is fatty alcohol.
A÷0.molar weight of A×times of fatty alcohol×0.molar weight of fatty alcohol.
This this my formulaNow suppose A is 1% active BTAC molar weight 404.15596. B is cetearyl alcohol molar weight 250.
The ratio you want to be 1:4 4 time the amount of fatty alcohol. It will be calculated like this.1÷0.40415596×4×0.25= ~2.5 fatty alcohol.
So for each % of BTAC at 1:4 molar ratio you will need ~2.5% fatty alcohol.
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Molecular weight of cetearyl alcohol 30/70 is 250.
Below 1:4 ratio the viscosity will be very low. 1:4-1:6 is best for viscosity and stability.
For each % BTAC 1.86% fatty alcohol gives you 1:3 molar ratio
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Guar gum doesn’t need heat but it needs high shear to dissolve
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Heat it, mix it with high shear mixer and cool it.
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Why you are not using a polymer like HEC or HPMC for viscosity and stability?
Like in cream and lotion, it has dramatic effect in conditioner viscosity too.I get enough viscosity with ≤1% BTAC , 2% fatty alcohol and some polymer.
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Or use lauryl glucoside if you have to use that in such high quantity.
Lauryl has better emulsifying, better viscosity and less foaming than decyl glucoside. -
11% decyl glucoside can be irritating.
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What is the pH?
Do you you know what each ingredient is doing in your formula?
For example what is 11% decyl glucoside doing there? -
ccchem said:@MarkBroussard @chemicalmatt @ngarayeva001
Thank you very much for your suggestions. I was able to resolve the clouding issue. 2 months later, the sample is still clear.
In my quest to try out different solvents I found 1,3 propanediol from a local supplier. However, during my experiment the propanediol turned reddish purple as soon as I added SA to it. My research tells me that SA will form a red/purple complex in the presence of iron. Has any of you experienced this?
Yes. Before adding salicylic acid in water add a chelating agent like EDTA first in water.
Although adding EDTA after color formation can also remove the color. -
Usually most chemists sell Shampoo formulations. Is don’t expect them to give you the best they can for free. But thanks to all of them, they help each other here if they have any problem in their formulas for free.
In your formula if you increase pq7 to 2ml it will solve some of your problems. But if you want me to give you the best formula that i can make, i will not do that for free.
Hope you understand it. -
I will start with 0.5%.
Decyl glucoside reduces viscosity.I will add it at the end after everything else has been mixed.
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Polyglyceryl 10 laurate