Isonate 125MCJ Isocyanate Dow Chemical PU - Isocyanates >> MDI, diphenylmethane diisocyanate >> Pure MDI ADHESIVE SEALANT ISONATE* 125MCJ pure MDI product is a crystalline, pure MDI mixture composed of approximately 98 percent 4,4’-diphenylmethane diisocyanate and 2 percent 2,4’-diphenylmethane diisocyanate. Characterized by high purity, low acidity and reproducible reactivity, this difunctional product is a key ingredient in preparing prepolymers for polyurethane processing. Judicious use of polyols, extenders and additives permits the manufacture of thermoplastic polymers suitable for extrusion, injection molding or solution applications. Sealants Adhesives Pure MDI mixture. Possesses high purity, low acidity and reproducible reactivity. Used in the preparation of prepolymers for polyurethane processing. 4,4'-diphenylmethane diisocyanate: 98% 2,4'-diphenylmethane diisocyanate: 2%