MDI, methylene diphenyl diisocyanate

...for hard and semi-hard polyurethane foams ...

MDI, methylene diphenyl diisocyanate, CAS: 101-68-8, is one of the most important chemical raw materials currently used in the polyurethane industry. MDI or MMDI are the most used abbreviation for this material which can be used as “pure” MDI, Modified MDI or Polymeric MDI (p-MDI). MDI is one of the main chemical ingredients used in the manufacture of flexible polyurethane foams for bedding, industrial goods, living goods (furniture cushions, carpet underlay), sports goods, SPANDEX, shoe sole, TPU elastomers, synthetic leather, paint and adhesive. MDI reacts with polyols in the production of different type of polyurethane.

Polymeric MDI
Polymeric MDI, polymethylene polyphenylisocyanates, also p-MDI or PMDI, is generally used in manufacturing hard and semi-hard polyurethane foam. Polymeric MDI is liquefied in normal temperature and easily handled and stored down to -20℃. The main application for Polymeric MDI, in the Polyurethanes industry, is: Construction Panels, Spray Heat Insulation, Refrigerators and Car Interiors.

Product:   Polymeric MDI, methylene diphenyl diisocyanate
NCO Content wt%  30.0∼32.0
Viscosity (25℃)  150∼230 cps
H.C wt%  Max. 0.3
Acid content % Max. 0.1
Molecular weight g/mol 350∼400


Tecnosintesi can provide several different grades of MDI: Pure MDI, Modified and Polymeric. To have a complete overlook of our MDI range, get in contact with us. We are one of the most competitive players in the market for MDI and our product quality is assured by one of the market leaders on this sector.   

Contact us for more detailed technical information, Technical Data Sheet, Commercial offer and Samples.    Send an e-mail to Tecnosintesi email contact

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