Mannich condensation is a relatively simple and effective modification method, which is through the condensation reaction of phenol, aldehyde and amine, to achieve the purpose of modification of polyamine. 多胺的改性方法有很多,Mannich缩合是一种比较简单而有效的改性方法,它是利用酚、醛、胺的缩合反应,达到对多胺进行改性的目的。