Polyurethane
What is Polyurethane?
Polyurethane is a synthetic polymer derived from the reaction of polyols and diisocyanates, used in skincare primarily as a film-forming agent that creates a flexible, protective barrier on the skin or hair. It is commonly found in makeup, sunscreens, and hair styling products where it provides adhesion, water resistance, and a smooth finish. Different variants like Polyurethane-11 are used for their elastic properties, mimicking natural skin flexibility without irritation.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Skin protecting
Forms a barrier to protect skin from external irritants.
Viscosity controlling agent
Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.
Film former
Creates a continuous film on skin or hair to improve wear, water resistance, transfer resistance, shine, or hold in sunscreens, makeup, and styling products.