三聚氰胺树脂鞣剂的研究（Ⅰ）—合成工艺研究

A Study of modified melamine - HCHO as a tanning agent (Ⅰ)

本文采用甲醇、丁醇对三聚氰胺甲醛树脂进行改性,用正交实验法筛选最佳反应控制条件及原料配比,获得无色透明,稳定性高,水溶性好的高固含量新型复鞣剂。 三聚氰胺1.0mol,丁醇1.0～1.5mol,甲醛3.0～3.5mol混合调PH值到7～8。80～90℃下反应20～40min;加入2.0～3.0mol甲醇,酸性条件下反应60～90min,得无色透明粘液。调节PH值至8～9,即得产品。 产品作红外光谱表明,生成了丁醚及甲基醚。核磁共振图谱可见,产品的稳定性与醚化程度关系密切,醚化程度高则产品稳定。

New tannage with high - stability and good -solubility is obtained based on the esterified melamine - formaldehyde condensates with bu-tanol and methanol. A mixture of 1 mol meiamine 1. 0 - 1. 5 mol butanol and 3. 0 - 3. 5 mol formaldehyde react for 20- 40 min at 80-90℃, pH7-8;then add 2. 0-3. 0 mol methanol. react for 60-90 min. in the presence of acid; adjust its pH value to 8-9.H-NMR Analysis of the product shows a pro-(?) with high-stability.