Methylene Diphenyl Diisocyanate (MDI) is a highly important aromatic isocyanate used primarily in the production of rigid polyurethane foams and various high-performance materials. It is produced through the reaction of aniline and formaldehyde, followed by phosgenation, resulting in a range of MDI variants.
MDI is known for its superior mechanical strength, insulation properties, and versatility across industries such as construction, refrigeration, automotive, and industrial manufacturing. At Qchem, we supply high-quality MDI to ensure consistent processing and reliable end-product performance.
Widely used in rigid foam applications such as insulation panels and construction materials. Offers excellent bonding strength and structural stability.
Used in more specialized applications including elastomers, coatings, and adhesives requiring precise reactivity and performance.
Pre-reacted or blended forms designed for specific applications, offering improved processing and tailored properties.
MDI is widely used across various industries:
Used in insulation boards, sandwich panels, and spray foam systems for buildings and cold storage. Provides excellent thermal efficiency and structural integrity.
Applied in:
Improves energy efficiency and building durability.
Used in insulating refrigerators, freezers, and cold storage units, ensuring optimal thermal performance.
Utilized in:
Enhances strength while reducing overall weight.
Provides superior adhesion, chemical resistance, and mechanical strength in industrial formulations.
Used as a binder in engineered wood products such as particleboard, MDF, and OSB panels.
| Property | Value |
|---|---|
| Chemical Name | Methylene Diphenyl Diisocyanate |
| Chemical Formula | C₁₅H₁₀N₂O₂ |
| Appearance | Brown liquid (pMDI) / Pale yellow solid-liquid (pure MDI) |
| Odor | Mild aromatic |
| Density | ~1.2–1.3 g/cm³ |
| Melting Point | ~39–42°C (pure MDI) |
| Reactivity | Reacts with polyols to form polyurethane |
| Viscosity | Medium |
MDI reacts with polyols to form rigid and semi-rigid polyurethane systems. It is compatible with:
Its controlled reactivity allows manufacturers to achieve desired density, insulation, and strength characteristics.
All packaging meets safety and international transport standards.
Qchem supplies premium-grade MDI backed by strong global sourcing and logistics expertise. We ensure consistent quality, competitive pricing, and dependable delivery to support your production processes without interruption.
Our team works closely with clients to provide the right materials and technical support for optimal results.
Contact Qchem today to source high-quality MDI tailored to your industrial requirements. We’re here to support your business with reliable supply and expert assistance.
