Introduction to 4,4′-Diaminodimethane 4,4′-diaminodimethane (MDA, Methylene Dianiline), is an important organic compound with the chemical formula C13H12N2. It has a wide range of applications in industrial production, especially in the synthesis of polyurethane materials. As a high-performance crosslinking agent and curing agent, MDA can significantly improve the mechanical strength, heat resistance and chemical stability of...