[ZivBA]

Use Lauryl Lactyl Lactate to increase viscosity.

STEPAN MILD L3.

In a system with ABC, Sarcosinate, Taurate, Cetyl Glucoside and all the other mild surfectants- you can thicken the formulation with 1-3% of the L3.

Belassi is right, the sensorial effect of the gums won’t get you anywhere.

[ZivBA]

Thanks for the answers.

I’m looking for the claim “Oil Free” in a sunscreen cream.

The thing is that you need “Oil” to solubilize the Avobenzone & Benzophenone 3.

I have a formulation that passed al tests for “Broad Spectrum SPF 50+”,

and now they looking for “Oil Free” Claim on the label…..

Chemist77 , Bill_Toge  thanks, I think I’ll go with your answer and try to pass it.

[ZivBA]

Bill_Toge- I do agree with you.

After I read all the comments over here, and chemicalmatt comment.

But why in one preparation it dissolve in water and at another one it settle down in water and disperse in C12-15 Alkyl Benzoate? 

[ZivBA]

Thank you all for your time.

chemicalmatt - Maybe you right and the test with C12-15 Alkyl Benzoate isn’t suitable for this formula.

When I put it in water it crates perfect drops inside the water that doesn’t mix, and settled at the bottom of the beaker.

Can you suggest anything else?

Full Formula:

Water QS

Pemulen TR1- 0.1

Sorbitol 70%- 3

TEA- 0.05

Avobenzone- 3

Homosalate- 13

Octyl Salicylate- 5

Octocrylene- 2

Oxybenzone- 4

Stearine- 1

Span 65- 0.1

VP/Hexadecane- 3

Dimethicone 350cp- 0.5

PEG 150 Distearate- 0.1

[ZivBA]

IDENTICAL all the 4 times.

The only thing that I changed was the homogenization time, and temp of the oily phase (50c & 70c).

After each time I’m dissolving the emulsion in water or C12-15 Alkyl benzoate, that’s how I know if it’s W/O or O/W. 

That’s why I cannot understand or explain why I’m getting those results.

I’m just looking for consistency…….

Do you have any idea?

[ZivBA]

Thank you for your explanation and google references.

Now,

Can you please help me with my question:

I made this formulation 4 times, two of them the emulation came as o/w, and the other two- w/o.

How and why?

[ZivBA]

Yes you right,

It is a Shampoo formulation.

[ZivBA]

I don’t see that you are neutralize the carbomer.

Add NaOH 10% Solution at step 6- 0.5%   

Move the Propylene Glycol to the water phase and lower it to 2% or less, It diluted the end product and effects the carbomer.

Lower the Caprylic/ Capric Triglyceride  to 2%.

Add C12-15 alkyl benzoate- 5-7%.

If you still get separation-

use Polyoxyethylene (40) stearate 1-2% and Sorbitan Tristearate 0.2-0.5%

instead of Cetyl alcohol & Stearic acid.