低挥发不饱和聚酯涂料固化特性  

Curing characteristics of low-emission unsaturated polyester coatings

作　　者：张斌[1] 叶代勇[1] 

机构地区：[1]华南理工大学化学与化工学院,广东广州510640

出　　处：《现代化工》2014年第12期62-65,共4页Modern Chemical Industry

基　　金：广东省工业科技攻关计划项目(粤科规划字[2012]98号)

摘　　要：为了更好地了解低挥发不饱和聚酯涂料的固化特性,对以甲基丙烯酸羟乙酯为活性稀释剂的低挥发不饱和聚酯涂料固化过程中的黏度、凝胶时间、凝胶含量、固化挥发分及转化率变化进行研究.结果表明：这种低挥发不饱和聚酯涂料常温固化时,固化剂质量分数为1％ ～2.5％时,凝胶时间在15 ～30 min;黏度先略有降低,18 min时急剧增大;固化8h,凝胶质量分数达到93％;24 h固化的转化率为66.38％;固化前20 min略有挥发,45 min后基本没有挥发,固化挥发分为1.5％.同时研究了固化反应表观动力学,得到表观活化能为41.67 kJ/mol,反应级数为0.962,固化体系的动力学方程为：dα/dt=1.119＆#183;106＆#183;exp（-5.013＆#183;103/T）＆#183;（1-α）0.962.In order to get a better understanding of the characteristics of the low-emission unsaturated polyester coating, the viscosity, the gel time, the gel content, the curing emission and the conversion of unsaturated polyester during the curing process are investigated. The result shows that the gel time is between 15 to 30 minutes when the curing agent varies from 2. 5% to 1.0%. The viscosity low-emission unsaturated polyester coating is slightly decreased at first, then dramatically increased at 18 minutes. When the gel time is 8 hours, the gel content reaches 93%. After curing for 24 hours, the conversion of unsaturated polyester is 66. 38%. The curing emission increases during the first 20 minutes and is stable at 1.5% after 45 minutes. The curing kinetics is also studied. The activation energy is 41.67 kJ·mol-1 and the reaction order is 0. 962,Its curing dynamic equation is do./dt = 1.119×106exp（ - 5. 013× 103/T） · （ 1 - α）0 962.

关 键 词：低挥发 不饱和聚酯 涂料 固化特性 

分 类 号：TQ630.7[化学工程—精细化工]