Diphenylmethane diisocyanate, or "MDI" for short, is a white to pale yellow molten solid, containing 4,4 '-diphenylmethane diisocyanate, 2,4' -diphenylmethane diisocyanate, 2,2 '-diphenylmethane diisocyanate, and other isomers. Is the aromatics downstream main products, widely used in polyurethane elastomers, synthetic fiber, artificial leather, solvent-free coatings and other polyurethane materials production field.
