news the effect of 4,4′-diaminodiphenylmethane as a curing agent on the performance of epoxy coatings the effect of 4,4′-diaminodiphenylmethane (ddm) as a curing agent on the performance of epoxy ... 05/09714′-diaminodiphenylmethane as a curing agent on the performance of epoxy coatings The effect of 4