[Chemist77]

@nasrins what kind of fluid is dimethicone whether newtonian, non-newtonian, pseudo-plastic, thixotropic or something else.

thank u

[Chemist77]

@nasrins To avoid these situations SAP values were created and are used in such situations. Its very rare that these carboxylic acids are employed as buffers for such kind of emulsions, rare means very very rare.

[Chemist77]

First of all why would you add citric acid to the emulsion, secondly check the pH before and after the addition of the carboxylic acid and you would know why its happening. If you want to keep the pH low then use less neutralizer or add more stearic acid.

[Chemist77]

Auto correction of pH I suppose and which was not possible during the initial stages because of the strong presence of electrolyte (4% you mentioned). With the overnight hydrolysis (dilution of electrolyte), guess the solution has attained optimum pH and electrolyte concentration for the thickener to regain its thickening efficiency.

Could this be the reason or is it entirely something else???????

[Chemist77]

@Zink OK the lotion thickened up, but what corrective measures you took???

[Chemist77]

Try making the same formula without the salt and see where you stand, shall clarify the things in one single step. You would know if the oil phase too is a problem or just the salt.

[Chemist77]

Though Sodium Lactate is a humectant but eventually it is an electrolyte and it is definitely not going to let the carbomer work to maximum.
Secondly I guess you could check some polarity index re the oil phase, might come handy on this one.

[Chemist77]

@mummydee dude I dont think it was me who mentioned ur parents, anyway good to hv u bk with health and heart.

[Chemist77]

Avobenzone has an affection for minerals and that gives you the colored complexes, by looking at your description of the formula it is very easy to comprehend that the pigments (straight or not) are forming complexes with Avobenzone. Either you would have to use coated ones which might reduce the effect or eliminate it or with the current recipe try using a little of a chelate.
Hope my suggestions can be bettered by someone more knowledgeable.

Check the link below

http://www.koboproductsinc.com/Downloads/NYSCC-Avobenzone.pdf

[Chemist77]

unless you have a very stubborn polymer where the air entrapment takes a little more time than usual to escape, otherwise bubbles are intrinsic to such surfactant hodge podge and which go away after after sometime.

[Chemist77]

@Perry Thank you so very much for this post, my take would be:

1. Discussing ingredients and their functions depending on the formula

2. Any issue with a formula which has been given due efforts for completion and still needs fine-tuning, but the formula should be a formula and not a skeletal one prompting people to make it complete. I am sure learned people can understand whats a real formula look like.

3. Any other technical issues pertaining to development e.g. packaging or filling or microbial issue and so on and so forth.

4. Last but not the least (and as pointed out in other links by DavidW) that if any opinion is asked re anything related to our field its the responsibility of the person to at least complete the circle by letting everybody know how the advice or suggestion worked out for him/her. But again its a matter of perception of the individual and how he/she feels about this forum and the learned members who take special and extra effort to suggest and advise us here.

Cheers

[Chemist77]

@Perry I like the moniker ‘greenwashed’.

[Chemist77]

@Hitesh

Make a 0.05 or 0.10% neutralized carbomer gel and add it to glycerin, replace 10% glycerin with this gel to start with and see where you stand in terms of viscosity, though I am sure the customer would be more comfortable with less of stickiness.

P.S.: tame gujarati nathhi

cheers

[Chemist77]

@cosmochem Talking of Dehydroxyxanthan Gum, can you please tell me how good it would work for a normal PAA polymer replacement in traditional hair styling gels. After you mentioned it, I tried pull up some info and honestly found quite a lot, some really dedicated and some over the top (though strictly my perception). I have worked with Xanthan but it was more of emulsion stabilization and the dispersion was never a promising gel anyway. Since I have never worked with this polymer, can you tell me if it works really well in styling gels???? The body provided by a regular carbomer is unparalleled and I was wondering if someone would share the pros and cons of this polymer before I make a sample request from suppliers. Please check the site below, it has mentioned so many benefits that the whole PAA chemistry seems useless now

http://www.thefreelibrary.com/Dehydroxanthan+gum%3A+National+Starch+researchers+provide+details+on…-a0116852519

[Chemist77]

@DavidW Think its the way of saying thank you unfortunately

[Chemist77]

@nasrins Read his requirement carefully, he doesn’t want to change a lot in properties and wants to retain the flow as well. Everybody knows glycerol is soluble in water, he just wants to know how to keep the viscosity same even after dilution and carbomer gel isn’t going to change the properties too.
Read carefully before you comment.

cheers

[Chemist77]

Hitesh Bhai

Kem chho,

As such I have no idea why you are looking to dilute this solvent and you want the same properties as well. Without knowing much about your requirement I understand that you need to retain the same flow properties as the priority and then so on and so forth. Well what you can do is use a neutralized polymer gel solution with low viscosity and mix it with glycerin as per you need of viscosity and properties. Use carbomer 940 and you can make a 0.30% or 0.50% neutralized aqueous gel. Add this to glycerin and see how far you can go.
Have a good one.

Cheers

[Chemist77]

Eli think you need to do some knock out trials to determine which of the ingredients is affecting the H bonding of your surfactant and throwing it back into the solution. Anything apart from high temperature of course, that affects the H bonding is going to hurt the surfactant solution.
I hope you can have some better inputs on this but this is the best I could think of.

[Chemist77]

Eli can you please tell me which surfactant you hv used in your formula?????

[Chemist77]

@Bill_Toge Simply great, and yeah I suppose the TiO2 is the one with alumina and silica.

[Chemist77]

Rosa analytical approach would be to make a lab bulk without the additives and distribute in equal parts. Add one additive to each part and check which one is making the emulsion unstable. Hope you can have a better approach from more learned members who can point out the exact culprit.

[Chemist77]

and both are surfactants

[Chemist77]

One is ethoxylated and the other not.

[Chemist77]

Well what I understand is that probably the OB is the one giving problems, is it not possible to ask your supplier for more elaboration on this. You might be advised for another brightener and that suits your current recipe. If there was a problem with your surfactant it would show but when you mix everything then only you are having trouble. EDTA might be a help as you pointed out but still I suggest you check with your supplier for perfect solution.

[Chemist77]

@Bobz from what i have read, it has been cleared many times that slowdown is possible, prevention not possible. Hope I am wrong coz even I have same issues in many if my lotions with vanillin.
I think the product is VanillaWhite and its a propietary molecule, might be worth a try. Thanks Bobz