Skim through

What it does: emulsifying, surfactant/cleansing

The science

PPG-2 hydroxyethyl cocamide, as a surfactant cleansing agent, is used for skin and hair-cleaning purposes. It helps to wet body surfaces, emulsify or solubilize oils, and suspend soil. It is also characteristic that surfactants are responsible for the foaming and lathering properties of cleansing products. PPG-2 hydroxyethyl cocamide can be used as solubilizer, helping with the dissolution of an ingredient (solute) in a medium in which it is not otherwise soluble.

Benefits for your hair

Improves application

As an emulsifying agent, this ingredient helps to thicken and stabilize products, making the application process smoother and easier.

TLDR 

PPG-2 hydroxyethyl cocamide is a great ingredient that helps to stabalize products and improves the efficiency of the application.