For instance, if you wanted to make a body lotion with a 30% oil phase, and you were planning to use Polawax, you would want to use 7.5%% Polawax. For Lotionpro 165, you'd use up to 5%, and for Incroquat BTMS-50, you could use as low as 5% as well. You couldn't use Ritamulse SCG or Sucragel AOF as they can only handle oil phases up to 25%. If you were to use these latter emulsifiers or use only 5% Polawax, you would likely see a lotion fail.
So let's say you wanted to make a facial moisturizer with AHAs, proteins, silicones, and cationic ingredients. You would want to use Polawax, e-wax, Incroquat BTMS-50, or Lotionpro 165. You can't use Ritamulse as you are using a positively charged or cationic ingredient. You can't use Sucragel AOF as you are using silicones. You can't use Olivem 1000 because you are using a protein.
If you wanted to make a light lotion, you might turn to Sucragel AOF, Olivem 1000, or Lotionpro 165 to keep the viscosity low. (And leave out the thickeners!) Having said that, you could use any of these emulsifiers as they can all make light lotions!
Related posts:How do we make substitutions with our emulsifiers? Polawax
How do we make substitutions with our emulsifiers? E-wax
How do we make substitutions with our emulsifiers? Ritamulse SCG
How do we make substitutions with our emulsifiers? Incroquat BTMS-50
How do we make substitutions with our emulsifiers? Lotionpro 165
Beeswax is not an emulsifier. It can be combined with borax for water-in-oil lotions, but on its own, it is not an emulsifier. Other waxes like floral waxes or things like sunflower wax are also not emulsifiers. In order to be an emulsifier, the ingredient needs to be a surfactant with a hydrophilic - water loving - head and a lipophilic - oil loving - tail. The hydrophilic head is in contact with the water phase while the lipophilic tail is in contact with the oil phase. The hydrophilic tail connects to the oil and the head protudes into the water connecting the two. Beeswax, floral, and vegetable waxes simply don't have those features.