Lupranat MES 4,4'-Diphenylmethane diisocyanate BASF-Elastogran Polyurethane (PU) - Isocyanates >> MDI, diphenylmethane diisocyanate Lupranat MES is a 4,4'-diphenylmethane diisocyanate (MDI) with low acidity. It is stabilized against yellowing and contains BHT. Lupranat MES is used for the manufacture of elastomers and thermoplastic polyurethanes. It is also used for the production of coatings. Diphenylmethane-4,4'-diisocyanate (MDI) with low acidity, stabilized against yellowing and containing BHT. Used for the production of coatings, elastomers and thermoplastic polyurethanes.