[Fekher]

Trying o/w emulsion the ph of ZnO dispersion is superior then 7

[Fekher]

Any idea please?

[Fekher]

As written I guess A but it seems that some ingredients are missing in B

[Fekher]

Is it for hair?

[Fekher]

For Gms Se 4% and polysorbate 80 1.5% the hlb of the emulsifiers is inferior then 8 will this system lead to a stable o/w emulsion?

[Fekher]

I already read about high ethoxylated product and deactivation of phenoxyethanol in scientific pdf paper just I forgot the reference if I find it I will share that.

[Fekher]

Not for all batches we find problem .
how to reheat and mix ? as heating nothing special same for mixing.
About mixing in cool down i guess it is true accordiong to older production.

[Fekher]

1) batch size almost 300 kg mixing with both anchor agitator and Turbine agitator placed in the bottom of the tank ( i have also dobt that bad ratio made between (turbine diameter/tank diameter) is bad , in bibliography ratio almost superior then 0.25 in our case it is inferior then 0.20 even the place of turbine in the bottom is not the adequat place according to what i saw in my class and bibliography (generally it is placed higher then the bottom ) @Juggsy any comment about these details i will be soo thankful .
About heating and cooling it is double wall tank .

2) As described , yes with mixing by turbine.

3) You ask about frequence ? the question is not clear for me if you can explain more.

[Fekher]

@Juggsy thanks a lot for your awsome answer and explanation really very informative. About brevity, reading your answer i wanted to read more and find longer answer🙂❤️. Keep sharing interesting details and sush on long answers because they are a real tresor.

[Fekher]

at high ph it has sure the strong power from sodium hydroxide however by neutralizing the base by citric acid the power will decrease normally.

[Fekher]

yes that’s answer just the difference between laboratory and industrial scale and it is for sure what you said.however my two questions are not about that .

the first is why in industrial size and trying to maintain same process we get important difference in viscosity in differents baches (some have lower viscosity then desired one)

the second question why the batches have lower viscosity become fine in industrial scale by reheating to 50 C degree and even lower with mixing?

Any expert have explaination or even doubts my helps ? thanks in advance

[Fekher]

may it contains important quantity of sodium hydroxide .

[Fekher]

Ph 10 and and needs 3,5% Citric acid to drop to 7 normally it must contains not sited base.

[Fekher]

Your formulation supposed to be far from soaping my dobt is that your raw materials are bad quality.

Ingredients may make soaping in your formulation basically Pq7 and emulsifier but with your level of use for silicone must be too far from soaping.

[Fekher]

I second @Abdullah

[Fekher]

Thanks a lot for sharing.

[Fekher]

For skin feeling absolutely gms se has very superior feeling versus Ceteareth-2 or 3.the same for viscosity and texture. Just I have doubt about stability. I made sample with gms se from 6 months and still stable…

[Fekher]

Deal with that, so the question can gms in used level with ceteareth-20 lead to stable emulsion?

[Fekher]

So the emulsion will be stable with coupling gms se by ceteareth-20?

[Fekher]

I guess that gms se contains basically non ionic emulsifier which is glyceryl stearate and very low level of stearate soap the other ingredients are : Ppg15 Stearyl Ether, Isopropyl Myristate, Aluminum chlorohydrate, parfum, Phenoxyethanol, Sodium benzoate.

I already made sample and it looks great: very smooth texture with ordinary viscosity.

So my guess, scientifically even with low pH just the stearate will decompose to stearic acid and base then because the low level of soap in gms se the stability will be fine, not?

[Fekher]

<div>2) Clear</div>

4) Supposed you have 15% oil isn’t too low 1% and even more as emulsifier?

[Fekher]

Thanks a lot, for

2) do you think it is ratio between cationic active surfactants and fatty alcohol not between level of use of cationic surfactants and fatty alcohol?

Because it is not really clear.

4) Thanks for sharing however in practise if I use 5% ceteareth I have to use 20% fatty alcohol? It will not too much fatty alcohol?

[Fekher]

In that case your explanation is logic. Thanks for the new information.

[Fekher]

Thanks, the batch for 300 kg using the same lots of colours of older batches . About changing bottles I suggested it but for economical reason the suggestion was refused.

[Fekher]

Nice guess. Just I guess even not Neutralised the carbomer is anionc not?

So if it in both case there is anionc and cationic charges.