... DescriptionMDI is methane diphenyl diisocyanate (pure MDI), contains a certain proportion of pure MDI and multi-multi-multi-phenyl isocyanate ... mixture (polymerization MDI) and pure MDI and polymer modified MDI Of collectively, is the most important ... production of polyurethane raw materials, a small amount of MDI used in addition to other aspects of polyurethane.Both ...