4,4’-Methylenebis(phenyl isocyanate) (MDI)

Description

1. Product Overview
   4,4’-Methylenebis(phenyl isocyanate) (MDI) is a high-performance aromatic diisocyanate widely used as a core building block in polyurethane chemistry. It is primarily applied in the production of rigid and flexible polyurethane foams, coatings, adhesives, sealants, and elastomers across industrial manufacturing sectors. The product delivers exceptional reactivity and mechanical strength, enabling the production of durable, energy-efficient materials with superior thermal insulation properties. Strategically, MDI is a critical input in construction, automotive, refrigeration, and advanced materials industries, making it a cornerstone chemical in global polymer value chains.
2. Key Specifications & Technical Characteristics

• Chemical Composition: 4,4’-Methylenebis(phenyl isocyanate) (C₁₅H₁₀N₂O₂)
• CAS Number: 101-68-8
• Purity Grade: ≥ 99.5% (industrial grade / polymer-grade options available)
• Physical Form: White to pale yellow crystalline solid (solid at room temperature; may liquefy at elevated temperatures ~40°C+)
• Density: ~1.20–1.25 g/cm³
• Melting Point: ~38–42°C
• Packaging Options: 250 kg steel drums, 20–23 MT ISO tank containers
• Storage Conditions: Dry, cool, well-ventilated environment; moisture-sensitive
• Shelf Life: 6–12 months under recommended storage conditions

3. Core Industrial Applications
   MDI is a key raw material in polyurethane production, serving high-demand industries such as construction, automotive, refrigeration, furniture, and footwear manufacturing. It is extensively used in rigid foam insulation panels for energy-efficient buildings and cold chain systems, as well as flexible foams for seating and cushioning applications. In coatings and adhesives, MDI enhances chemical resistance, bonding strength, and durability under extreme conditions. Compared to alternative isocyanates, MDI offers superior structural integrity, thermal stability, and cost-efficient scalability in large-volume industrial production.
4. Competitive Advantages

• High product consistency ensuring predictable polymer performance in large-scale manufacturing
• Reliable global supply chain with stable production capacity for bulk industrial demand
• Efficient logistics solutions supporting containerized and ISO tank shipments worldwide
• Competitive pricing structure optimized for long-term procurement contracts
• Strong technical documentation and quality assurance support for regulatory compliance
• High energy-efficiency contribution in end-use applications, supporting sustainability goals in construction and refrigeration sectors

5. Commercial & Supply Information

• Minimum Order Quantity (MOQ): BULK 20 MT
• Loading Capacity: 20–23 MT per 20-foot container (ISO tank or drum configuration available)