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4,4′-diaminodicyclohexylmethane (4,4′-diaminodicyclohexylmethane) has a diamine structure and has three isomer forms: trans-trans, cis-trans, and cis-cis. In industrial production, it is generally used as MDA. (4,4′-diaminodiphenylmethane) is the main raw material and is produced through catalysis, hydrogenation and other reactions. It is a high value-added fine chemical with excellent yellowing resistance. 4,4′-Diaminodicyclohexylmethane is mainly used as…