Isocyanate Crosslinker
CAS Number: 28182-81-2
Isocyanate crosslinkers are polyfunctional compounds bearing two or more –NCO groups that react with hydroxyl, amine, or carboxyl groups in resin binders to form urethane, urea, or amide linkages, building a dense crosslinked network. HDI trimer (CAS 28182-81-2) and IPDI-based aliphatic isocyanates are standard workhorse crosslinkers for high-performance exterior and automotive coatings due to their excellent UV stability and color retention. Aromatic variants such as TDI and MDI adducts are used in industrial and adhesive applications where UV stability is less critical.
Technical Specifications
| purity | ≥99% |
| appearance | Colorless to pale yellow low-viscosity liquid |
Applications
- Two-component polyurethane automotive OEM and refinish coatings
- High-performance exterior architectural and industrial maintenance coatings
- Polyurethane adhesives and sealants for automotive and construction
- Textile and leather coatings requiring flexibility and abrasion resistance
- Waterborne two-component PU coatings with hydrophilic-modified isocyanates
Key Features
- High NCO content (≥20%) for efficient crosslinking at low addition levels
- Aliphatic grades provide outstanding yellowing resistance and exterior durability
- Blocked isocyanate grades available for single-package bake systems
- Hydrophilic-modified grades compatible with waterborne hydroxyl-functional resins