MDI

Diphenylmethane Diisocyanate (MDI)

Synonyms: 4,4′-Diphenylmethane Diisocyanate; 4,4′-Methylenebis(phenyl isocyanate); 4,4′-MDI

Molecular Formula: C₁₅H₁₀N₂O₂

Molecular Weight: 250.3 g/mol

Description: MDI is a white to light yellow crystalline solid aromatic diisocyanate at room temperature, with high reactivity. It is a core raw material for producing high-performance polyurethane foams, elastomers, adhesives, and coatings, offering excellent mechanical strength and thermal insulation properties.

Key Properties:

Appearance: White to pale yellow solid (flakes or fused)
NCO Content: ≥33.6
Purity: ≥99.5%
Colour value:≤30
Hydrolyzed chlorine content:≤50mg/kg
Density (50°C, molten): ≈1.23 g/cm³

Applications: MDI is primarily used to produce rigid and flexible polyurethane foams, as well as prepolymers for elastomers, adhesives, sealants, and coatings. These products provide superior mechanical properties, thermal insulation, durability, and versatility, making them ideal for:

Rigid foams for building insulation and refrigeration
Flexible foams for furniture, bedding, and automotive seating
Automotive interiors and components
Industrial elastomers and castables
Adhesives, sealants, and specialty coatings

Safety Notes:

MDI monomer is highly reactive and toxic. It may cause severe respiratory sensitization, skin irritation, and eye damage. Strict ventilation, personal protective equipment, and handling protocols are mandatory.

MDI

MDI

Safety Notes:

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