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Ingredient Facts
Hdi/pei-45/smdi crosspolymer
AKA: Hexamethylene diisocyanate crosspolymer
Ingredient · Absorbent · EWG: 4
Synthetic
Not Clean
HDI/PEI-45/SMDI Crosspolymer is the crosslinked polymer formed by the reaction of PEI-45 with saturated methylenediphenyldiisocyanate (SMDI) and hexamethylene diisocyanate (HDI).
Form
Liquid
State
Solid
See origin →
Functions
Absorbent
Plasticiser
Absorbs excess oil
Adds flexibility
Traditional Use
A synthetic crosspolymer developed in the late 20th century using HDI (hexamethylene diisocyanate) and SMDI (semi-alicyclic methylene diphenyl diisocyanate) chemistry. Designed as a film-forming, binding, and texture-modifying agent in modern skincare and cosmetic products.