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  • Methylene Diphenyl Diisocyanate

Methylene Diphenyl Diisocyanate

  • MDI (Adhesive, Coatins and Sealants)
  • MDI (packaging foams, casting materials, binders and adhesives)
  • MDI (Adhesive, Coatins and Sealants)
    Lupranate MI Isocyanate is pure diphenylmethane diisocyanate containing a higher amount of 2,4 ́ isomer than Lupranate M Isocyanate or Lupranate MS Isocyanate. Lupranate MI Isocyanate has a functionality of 2.0 and is liquid at room temperature. Lupranate MI isocyanate is used in the isocyanate component for the preparation of flexible, semi-flexible and microcellular urethane foams. Lupranate MI Isocyanate can also be used for the production of adhesives, coatings and sealants.

  • TYPICAL PROPERTIES
    Appearance colorless to reddish yellow liquid
    NCO content, wt.% 33.5
    Freezing range, ̊ 10-15
    Purity, wt.% 99.5
    Hydrolyzable chlorine, ppm <40
    Flash point, °C (COC) 199
    Density @25°C, g/cm 3 1.22
    Initial boiling point, 5mm Hg, °C 190
    Vapor Pressure @25°C, mm Hg 0.0003
    2,4’ Isomer, wt. 50
  • STORAGE

    Lupranate MI Isocyanate is available in tank trucks or drums. Once a container has been opened, care should be taken to exclude moisture. Lupranate MI isocyanate should be stored at 23-30°C under nitrogen. Upon prolonged storage some turbidity and sediment may form due to dimerization. Through careful filtration these solids can be removed without adversely affecting the product quality. Below 15°C solid crystals may form and settle out which can alter the performance of the product. The solid crystals are monomeric MDI and in this solid form exhibit the dimerization characteristics of pure MDI. Unless prompt action is taken to melt the product, subsequent dimerization will proceed and may deteriorate the clarity and assay of the product. Melting the crystals is ideally done by rolling the drum in a hot air oven at 80-100°C. Melting under these conditions should take 4-8 hours. The drum contents should not be heated above 70°C to minimize dimer formation.

  • WARNING
    Heating by electrical means is not recommended due to the danger of local overheating, which would result in dimer formation. Melting Lupranate MI Isocyanate in a water bath is not recommended because of potential danger of the isocyanate reacting with water in case of drum leakage. Rolling the drum in atmospheric steam is an alternate procedure that can be used provided that care is taken to ensure that the drum does not leak. The shelf life of Lupranate MI Isocyanate is six months if the temperature is maintained at 23-30°C and moisture is excluded.
  • MDI (packaging foams, casting materials, binders and adhesives)
    Lupranate M20 Isocyanate is a polymeric MDI with a functionality of approximately 2.7. Lupranate M20 Isocyanate can be used for the production of rigid insulation foams by molding, spraying, and frothing. It is also used for rigid and semi-flexible integral skin foams, adhesives, sealants, elastomers, and high-resiliency flexible foams. In low catalyzed rigid urethane formulations, the foam rise time can be lengthened by 20-30%. The slower reactivity can be advantageous in applications such as large rigid foam panels or molded flexible foams.

  • TYPICAL PROPERTIES
    Appearance dark brown liquid
    NCO content, wt.% 31.5
    Viscosity @ 25°C, cps 200
    Hydrolyzable chlorine, ppm <250
    Flash point, °C (COC) 200
    Density @25°C, g/cm 3 1.23
    Initial boiling point, 5mm Hg, °C 190
    Vapor Pressure @25°C, mm Hg 0.0002
  • STORAGE

    Lupranate M20 Isocyanate is supplied in tank cars, tank trucks, and drums. Once a container has been opened, care should be taken to exclude moisture. The most favorable temperature for storage is 15-35°C. If stored at higher temperatures, or if moisture is not excluded, an undesirable increase in viscosity will occur. Below 15°C, the product becomes difficult to pump and pour. Below 0°C, crystallization may occur. The shelf life of Lupranate M20 Isocyanate is nine months if the temperature is maintained at 15-35°C and moisture is excluded.

  • WARNING
    These products can be used to prepare a variety of polyurethane products. Polyurethanes are organic materials and must be considered combustible.