Methylene diphenyl diisocyanate (MDI) is one of the most important raw materials used in the polyurethane industry. Due to its high reactivity, excellent mechanical strength, and thermal insulation performance, MDI is widely used in the production of rigid foams, flexible foams, coatings, adhesives, sealants, and elastomers.

Isocyanates are among the most important chemical building blocks in modern polymer science, especially in polyurethane systems. They play a key role in determining the final appearance, durability, and long-term performance of many industrial products. While isocyanates in general are widely used in different industries, aliphatic isocyanates have gained special attention because of their excellent resistance to light, weathering, and environmental stress.