Hexamethylene Diisocyanate (HDI Monomer)
CAS Number: 822-06-0
Hexamethylene diisocyanate (HDI) is a low-viscosity aliphatic difunctional isocyanate used as a reactive intermediate and crosslinker in polyurethane coatings and adhesives for wood applications. It is a key raw material for the production of HDI biuret, trimer, and allophanate derivatives used in premium wood finishing systems.
Technical Specifications
| purity | ≥99.5% |
| appearance | Colorless to light yellow liquid |
| NCO content | 49.5–50.5% |
| flash point | 140°C (closed cup) |
| viscosity (25°C) | 3–4 mPa·s |
Applications
- Synthesis of HDI biuret and trimer derivatives
- Reactive crosslinker in 2K PU wood adhesives
- Chain extender in polyurethane dispersion synthesis
- Wood coating PU prepolymer manufacturing
- Reactive diluent in high-solids coating formulations
Key Features
- High purity aliphatic isocyanate monomer
- Low viscosity for reactive diluent applications
- Non-yellowing for light-stable coating systems
- Versatile intermediate for HDI derivative production
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CAS Number
822-06-0
Category
Wood / Furniture CoatingsAvailability
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