Methylenediphenyl Diisocyanate (MDI)

Chemical Name: Methylenediphenyl Diisocyanate

Common Name: MDI

CAS No: 101-68-8

Chemical Formula: C₁₅H₁₀N₂O₂

Appearance: Brown to yellow liquid / solid (depending on grade & temperature)

Description

Methylenediphenyl Diisocyanate (MDI) is an aromatic diisocyanate primarily used in the manufacture of polyurethane foams, elastomers, coatings, adhesives, and sealants. MDI is known for excellent bonding strength, chemical resistance, and thermal stability. It is widely used in insulation, construction materials, automotive parts, furniture and packaging industries.

Applications

• Polyurethane rigid and flexible foam production
• Insulation materials for construction & refrigeration
• Automotive seat foam and interior components
• Adhesives, sealants and coatings
• Elastomers for industrial applications
• Binders for wood & composite boards
• Footwear & sports equipment

Key Properties

• High reactivity with polyols and moisture
• Excellent adhesion & mechanical strength
• Superior thermal insulation performance
• Chemical and solvent resistance
• Dimensional stability and durability

Technical Specifications

• Purity: ≥ 99%
• NCO Content: ~31%
• Viscosity: 150 – 250 mPa·s (25°C)
• Density: ~1.23 g/cm³
• Flash Point: > 200°C
• Form: Liquid / solid depending on grade

Packaging

• 250 kg steel drums
• IBC tanks (1000 kg)
• Bulk tanker supply available

Storage & Handling

• Store in a cool, dry, ventilated area
• Protect from moisture—reacts violently with water
• Keep containers tightly sealed
• Use personal protective equipment (gloves, goggles, respirator)
• Follow proper ventilation protocols during handling

HS Code: 2929 10 20