[Fekher]

Formulation seems quite good just may:
1*Three uv filters will not protect as well if they are more ( i know that yours are broad spectrum however all sun screen seen contain more then three filters)
2* Oil phase is more then 40 % so it is really not easy to have stable emulsion .
3* Even with Sepinov EMT 10-0.8 Sepimax , Zen- 0.1 the level of Olivem 1000-1 ,Peg 100 stearate & Glyceryl stearate- 2 seems low .

• This reply was modified 1 week, 1 day ago by  Fekher.

[Fekher]

@mmarr i never recived complaining from EDAT in such level .

[Fekher]

@Perry44 @Pharma @Paprik @ozgirl @Cafe33 @chemicalmatt @grai any help?

[Fekher]

Thanks a lot for your valuables answers.

For emulsion of Neowax165 no i did not use gelling agent . for sensicare c1060 phenoxyethanol effect the viscosity almost but with differents intensity depend on formulation . For shampoo formulation i find piroctone olamine effect also the viscosity of product the point of glyceryl laurate i really i did not get it …

I haven’t time till now to make other samples with neowax 165 just the same formulation using sabowax AE gives higher viscosity.

About the used level of emulsifier you have right however it is not just to stabilise oil but to reach a desired viscosity and texture .

• This reply was modified 2 months ago by  Fekher.
• This reply was modified 2 months ago by  Fekher.

[Fekher]

Supposed to be stable same question which emulsfier is used?

[Fekher]

You question can be reduced to which is stronger detergent SLS or SLES by searching I understood that is SLS.

[Fekher]

may @ketchito @Abdullah @Graillotion can help

[Fekher]

i guess you should work on the level of use before then changing your emulsifiers .As i know yours can be fine . Make some researchement for free sunscreen formulations and you will find many emulsifiers systems .

[Fekher]

i don’t think that GMS SE alone can give a stable emulsion .

[Fekher]

Awsome answers . i agree with all said details , just i disagree with :” High concentrations of cetearyl alcohol, for example 5%, in combination with standard emulsifiers such as glyceryl stearate and PEG-100 stearate, often result in products that are waxy, slippery, or slightly soapy to the touch.” May it can lead to what you said depends on the full formulation however in all my formulations it isn’t.

• This reply was modified 1 week, 2 days ago by  Fekher.

[Fekher]

@chemicalmatt any other alternatives from sigma i could’nt find what you cited however i find a supplier that has some of sigma’s ingredients .

[Fekher]

Thanks a lot, actually there are a lot of acrylates copolymer do you recommend specific one “my dobt in carbopol Edt 2020”

[Fekher]

No all cellulose are bad in pumping. The problem is not gelling I did with many gelling agent however almost are bad in pumping for brush foaming bottle pump.

[Fekher]

thanks

[Fekher]

thanks

[Fekher]

There is no evidence relation that the more foam the more detergent power.

[Fekher]

Thanks a lot so what are using just solid perfumes? Then can you give example for this floral waxes?

[Fekher]

Any share or link?

[Fekher]

too slow 100 rpm for emulsion it should be more .

• This reply was modified 3 months, 2 weeks ago by  Fekher.

[Fekher]

Actually in 300 kg batch , have you suggestion about time ? i guess even in laboratory it needs more than 2 min then (high , slow) speed can you translate to rpm/min ?

[Fekher]

for 3) supposed to calculate required hlb , you will not calculate the required hlb of cetearyl alcohol?

[Fekher]

4- when , how much time and which speed ( for high and low speed) ?

5- Yes Phenoxyethanol reduce viscosity and maybe sensicare c 1060 reduce more this is the first point and second the drop of viscosity is more important using neowax 165 then other emulsifiers .

• This reply was modified 3 months, 3 weeks ago by  Fekher.

[Fekher]

Thanks a lot, so the good ratio (BTMS/Cetearyl alcohol) is ( 1:3)

[Fekher]

@Abdullah can you explain more please ?

[Fekher]

Thanks a lot for sharing and I can help you about stability problem just as a quick help 3% of BTMS 25 is just 0.75% emulsfier so alone in this level is it logic to haven’t stable emulsion.