Methylenedi-p-phenylene isocyanate (MDI)
Compounds with other nitrogen function: > Isocyanates: > Other: > Other > Methylenedi-p-phenylene isocyanate (MDI)
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Products classified under HTS 2929.10.80.10
Methylenedi-p-Phenylene Isocyanate (MDI)
MDI is a diisocyanate compound featuring two isocyanate (-NCO) functional groups attached to a methylene-bridged diphenyl structure, classifying it under HTS 2929.10.80.10 as an isocyanate with other nitrogen function. It is primarily used in the production of polyurethane foams, coatings, and adhesives due to its reactivity with polyols.
Polymeric Diphenylmethane Diisocyanate (PMDI)
PMDI is a polymeric form of MDI containing oligomeric isocyanate species with higher functionality, still classified under HTS 2929.10.80.10 due to its predominant isocyanate nitrogen functions. It is widely used in rigid polyurethane foam production for insulation and construction applications.
Monometric 4,4'-MDI (Pure Diphenylmethane-4,4'-Diisocyanate)
Pure 4,4'-MDI is the monomeric isomer of methylenedi-p-phenylene isocyanate, featuring isocyanate groups specifically at the para positions, falling under HTS 2929.10.80.10. It serves as a building block for high-performance polyurethanes in elastomers and coatings.
MDI Flakes (Stabilized Solid Form)
MDI flakes are solidified, stabilized methylenedi-p-phenylene isocyanate designed for easier handling and transport, classified under HTS 2929.10.80.10 as the pure compound with added stabilizer (Chapter Note 1(f)). Used in polyurethane systems requiring controlled reactivity.