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High chemical resistance and excellent weatherability due to aliphatic isocyanate structure.
Low volatility and reduced monomer content for improved occupational safety and handling.
Outstanding UV stability and minimal yellowing, ideal for demanding outdoor applications.
Good compatibility with a wide range of polyols including polyester, acrylic, and polycarbonate diols.
Controlled reactivity enables flexible formulation design for both ambient-cure and forced-cure systems.
High-performance automotive clearcoats and OEM topcoats.
Durable industrial maintenance coatings for infrastructure and machinery.
UV-resistant architectural coatings for façades and metal cladding.
Advanced optical adhesives and protective lens coatings.
Specialty elastomers requiring long-term color retention and hydrolytic stability.
| Chemical Type | Aliphatic diisocyanate (isophorone diisocyanate trimer) |
| Product Form | Liquid |
| Appearance | Clear, pale yellow to colorless liquid |
| NCO Content (wt %) | 11.5–12.5% |
| Viscosity (25 °C) | 800–1,200 mPa·s |
| Specific Gravity (20 °C) | 1.18–1.22 g/cm³ |
| Storage Stability | ≥12 months at 15–25 °C in sealed containers |
| Primary Applications | Two-component polyurethane coatings, adhesives, and elastomers |
Q1: What is the primary function of Covestro IPDI Isocyanate in coating and adhesive formulations?
A: It serves as a reactive curing agent that crosslinks with polyols, amine-terminated resins, or other nucleophiles to form durable, chemically resistant polyurethane or polyurea networks—offering excellent weatherability, flexibility, and low-temperature performance.
Q2: How does IPDI differ from other aliphatic isocyanates like HDI or H12MDI in terms of reactivity and film properties?
A: IPDI exhibits moderate reactivity compared to HDI—providing extended pot life for processing while still enabling efficient cure at ambient or elevated temperatures. Its sterically hindered structure contributes to enhanced UV stability and reduced yellowing, and its rigid cyclohexyl ring imparts improved hardness and chemical resistance relative to linear aliphatics.
Q3: Is this product suitable for high-solids or solvent-free systems?
A: Yes—Covestro IPDI Isocyanate is commonly used in high-solids coatings, UV-curable hybrid systems, and low-VOC formulations due to its favorable viscosity and compatibility with advanced resin technologies. Formulators often select it when balancing reactivity, handling safety, and final film performance without relying on high solvent content.
Q4: What are key storage and handling considerations for this isocyanate?
A: Store in tightly sealed containers under dry, inert atmosphere (e.g., nitrogen), away from moisture, heat, and strong bases. Prolonged exposure to humidity may cause dimerization or uretdione formation, affecting reactivity. Always use appropriate personal protective equipment—including chemical-resistant gloves and respiratory protection—as with all isocyanates.
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