Function & type of non-ionic emulsifier to add with cationic emulsion or conditioner
About a month ago i made lotion with 2% BTMS 25, 4% petroleum & 0.05 NACL. it is stable in high temperature, low temperature and 3 freeze Thaw cycle.
Yet it is suggested to add a non-ionic emulsifier in conditioner that has more cationic surfactant, more fatty alcohol & lower oil phase to emulsify.
My question is:
1. what is the need for a non-ionic emulsifier in cationic conditioner?
2. Should that non-ionic emulsifier be low HLB like GMS or high HLB like polyglyceryl-4 laurate for example and why?