Isonate M 125 Isocyanate Dow Chemical PU - Isocyanates >> MDI, diphenylmethane diisocyanate >> Monomeric MDI ADHESIVE SEALANT Monomeric MDI ISONATE* M 125 is a white to lightyellow crystalline fused solid of high purity and low acidity, containing approximately 97% 4,4'-diphenylmethane diisocyanate and 3% 2,4'-diphenylmethane diisocyanate. ISONATE M 125 is used in applications where its disfunctionality and low acidity can advantageously yield totally linear thermoplastic urethane elastomers and elastoplastic products. Together with longer chain polyethers, polyesters, or other polyols, high performance polymers may be compounded in a wide range of hardness for such applications as microcellular elastomers, coatings, adhesives and sealants. Monomeric MDI. White to lightyellow crystalline fused solid of high purity and low acidity. Yields linear thermoplastic urethane elastomers and elastoplastic products. 4,4'-diphenylmethane diisocyanate: 97% 2,4'-diphenylmethane diisocyanate: 3%