Lupranat MI Mixture of 2,4'- and 4,4'-diphenylmethane diisocyanate BASF-Elastogran Polyurethane (PU) - Isocyanates >> MDI, diphenylmethane diisocyanate Lupranat MI is a mixture of 2,4'- and 4,4'-diphenylmethane diisocyanate (MDI). Lupranat MI is together with other isocyanates used for the manufacture of flexible foams, coatings. Mixture of 2,4'- and 4,4'-diphenylmethane diisocyanate (MDI). Used in combination with other isocyanates for the production of coatings.