The dispersing agent is sulfonated acetone-formaldehyde polycondensate or amidosulfuric acid.
降滤失剂 为聚乙烯醇或丙烯酰胺共聚物中的一种；
2
Detailedly introduces definition classification and character of interfacial polycondensation and influential factors of polycondensate molecular weight.
并着重介绍了界面缩聚的定义、分类、特点以及影响缩聚物分子量的因素。
3
In addition, the separation method and the Characteristics of compositions and structure for the polycondensate (tannin) set up in this paper can be also used in other aromatic syntan.