您正在看的化学化工论文是:四甲氧基甲基甘脲固化: 耐久性高光、无光和皱纹粉末涂料。 sp;      40.0           40.0 

       固化剂 Powderlink 1174            8.0            6.0 

                                                                                                        

  

采用复合添加剂的方式甚至可以得到更厚的无缺陷膜。加入配方量5%的增塑剂单硬酸铝和0.3%的TED的效果如图九所示。TED和单硬脂酸铝复合使用可大幅度的降低最低粘度(3.1Pa?s)，提高流动性；这样可以得到厚达17 

  

表6、无缺陷涂膜性质 

                                                                                                        

        涂膜性质                     TAA-ol           DABCO 

                                                                                                       

        烘烤温度( ℃)                   190              190 

        最大无针孔厚度(密耳)           5.0              4.5 

        测试涂膜厚度(密耳)         2.2/2.7          1.8/2.5 

        甲基乙基酮擦拭                200+             200+ 

        涂膜外观                      光滑             光滑 

        黄变指数                     -0.56            -1.08 

        KNOOP硬度                     12.5             12.4 

        正/反冲击(in*lb)           160/160          160/160 

        60°光泽                      92.3             94.7 

        20°光泽                      78.8             88.4 

        储存稳定性(40℃，天)           >21              >21 

        盐雾试验，500小时 

        蠕变性                           0                0 

        外观                            10               10 

        耐湿性，60℃，504小时       无变化           无变化 

                                                                                                        

  

  

表7、TAA-ol或DABCO/单硬脂酸铝催化的1174粉末涂料配方 

                                                                                                           

组份