news Research progress on alternatives to 4,4′-diaminodiphenylmethane and its potential applications in the field of environmental protection Background and importance of 4,4'-diaminodimethane 4,4'-diaminodimethane (MDA, Methylene Dianiline)... 02/1854'-diaminodiphenylmethane and its potential applications in the field of environmental protection Research progress on alternatives to 4