HDI Trimer Isocyanate Hardener
CAS Number: 28182-81-2
HDI trimer (hexamethylene diisocyanate isocyanurate) is the benchmark aliphatic isocyanate hardener for two-component polyurethane wood coatings. Its non-yellowing nature and excellent weatherability make it the preferred choice for clear lacquers, light-colored topcoats, and exterior wood finishes requiring long-term UV resistance.
Technical Specifications
| appearance | Clear to slightly yellow liquid |
| NCO content | 21.5–22.5% |
| color (Hazen) | ≤30 APHA |
| solid content | ≥99% |
| equivalent weight | 190–195 g/eq |
| viscosity (25°C) | 2,500–4,500 mPa·s |
Applications
- Clear 2K PU topcoats for wood furniture
- Light-colored PU lacquers for cabinets
- Exterior wood and joinery coatings
- Parquet floor 2K PU finishes
- Automotive refinish clear coats
Key Features
- Non-yellowing aliphatic structure for permanent clarity
- Excellent UV and weathering resistance
- High functionality ensures dense crosslink density
- Compatible with all OH-functional resins and polyols
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CAS Number
28182-81-2
Category
Wood / Furniture CoatingsAvailability
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