metüleendifenüüldiisotsüanaati

Metüleendifenüüldiisotsüanaat, commonly abbreviated as MDI, is an aromatic diisocyanate. It exists in several forms, including pure MDI, polymeric MDI (PMDI), and modified MDI. MDI is a crucial component in the production of polyurethanes, a versatile class of polymers.

The primary application of MDI is in the manufacturing of rigid polyurethane foams. These foams are widely used as insulation in construction, refrigeration, and automotive industries due to their excellent thermal properties. MDI is also used to produce semi-rigid foams, elastomers, coatings, adhesives, and sealants. Its reactivity allows it to form strong, durable bonds with polyols, the other main component in polyurethane synthesis.

MDI is produced through the phosgenation of aniline, a process that involves hazardous chemicals. Due to its reactivity, MDI can cause respiratory sensitization and skin irritation upon exposure. Therefore, strict industrial hygiene practices and personal protective equipment are necessary when handling MDI and its products. Environmental regulations govern its production, use, and disposal to minimize potential risks. MDI is a significant industrial chemical with widespread applications contributing to various modern materials and technologies.