用作漆雾絮凝剂的三聚氰胺甲醛树脂合成研究

Study of Melamine-formaldehyde resin as overspray paints flocculant

三聚氰胺在盐酸的水溶液中与甲醛进行羟甲基化反应,对合成产物进行表征和性能测试,并深入研究了反应物配比、反应时间、反应温度对三聚氰胺甲醛树脂用作漆雾絮凝剂效果的影响及三聚氰胺甲醛树脂溶液的稳定性,找出了用做漆雾絮凝剂最佳的反应条件为n(三聚氰胺)∶n(甲醛)∶n(盐酸)=1∶2∶1,反应温度60℃及反应时间3 h。

Hydroxymethylation was taken place between melamine and formaldehyde in hydrochloric acid aqueous solu- tion, and products were characterized and tested. Melamine - formaldehyde resin used for over.spray paints floceulant as the reactant concentration,reaction time.temperature and the stability of melamine -formaldehyde resin solution were studied. And the best synthetic conditions were found, melamine/formaldehyde/hydrochloric acid （mole ratio ） = 1 ： 2： 1, reaction temperature 60 ℃ ,reaction time 3 h.