该品是通过芳香烃衍生物磺化作用在苯环上接上一定数量的亲水基团,使之具有良好的鞣性,并具有合适的溶解与渗透性。又通过在酸性条件下加入缩合剂,使之缩合成恰当分子量的高白度值的合成鞣剂。试产品经泉州、金华、青岛等地制革企业在实际生产中批量应用,效果良好,是生产白色软面革的理想复鞣材料。 The product is a certain number of hydrophilic groups attached to the benzene ring through sulfonation of aromatic hydrocarbon derivatives, so that it has good inertness, and has a suitable solubility and permeability. By adding a condensing agent under acidic conditions, it is condensed into a synthetic tanning agent with a high whiteness value of an appropriate molecular weight. The trial products have been applied in batches in actual production by the tanning enterprises in Quanzhou, Jinhua, and Qingdao with good results. They are ideal reclaimed materials for producing white soft leather.