overview of 4,4′-diaminodimethane (mda) as an epoxy resin curing agent 4,4′-diaminodiphenylmethane (4,4′-diaminodiphenylmethane, referred to as mda) is an important organic compound and is widely used in high-performance composite materials, electronic packaging, aerospace and other fields. as a curing agent for epoxy resin, it has excellent mechanical properties, heat resistance and chemical stability. the mda molecular...