POLYOL - ISOCYANATE: POLYURETHANE CHEMICAL.
Polyol is one of the two main components used to produce polyurethane foam. It is not a single pure substance—it’s usually a blend of several ingredients designed for specific foam types.
In simple terms:
Polyol is the “soft part” of polyurethane foam.
Key features:
Usually a thick liquid
Can be polyether polyol or polyester polyol
Determines:
Flexibility (soft foam like mattress)
Rigidity (hard foam like insulation)
Isocyanate is a highly reactive chemical that contains –NCO groups.
In simple terms:
Isocyanate is the “hard/reactive part” that makes everything bond together.
Common types:
MDI (Methylene Diphenyl Diisocyanate) → used for rigid foam
TDI (Toluene Diisocyanate) → used for flexible foam (e.g., cushions