在氨基树脂的合成中,尿素、三聚氰胺等多元胺类同甲醛加成将生成一系列程度不等的多元胺羟甲基衍生物的混合物。为获得官能度、官能团分布等参数需确定体系中各组分的含量。这一问题我们已做了统计分析。但羟甲基衍生物进行交联或醚化作用时常伴随着羟甲基的分解反应。例如三羟甲脲的分解反应: In the synthesis of amino resins, the addition of polyamines such as urea and melamine to formaldehyde will generate a series of mixtures of polyhydroxymethyl derivatives of varying degrees. In order to obtain the functionality, distribution of functional groups and other parameters need to determine the content of each component in the system. We have done a statistical analysis of this issue. However, hydroxymethyl derivatives are often accompanied by hydroxymethyl decomposition reaction when they are cross-linked or etherified. For example, the decomposition of trimethylolurea reaction: