动车组用环氧底漆的增韧改性研究

A Study on Toughening and Modification of Epoxy Primers for Motor Train Units

目前广泛使用于动车组列车的底漆为双组分环氧体系,因环氧体系本身刚性较强而缺乏韧性,在高寒地域运行的动车组列车上使用,可能会出现开裂和附着力丧失等问题,使车身失去涂层保护。本研究工作通过引入端羧基丁腈橡胶(CTBN)与环氧树脂的预聚体进行增韧,显著提升了环氧底漆涂层的柔韧性和耐低温性能,同时,环氧底漆具有良好的贮存稳定性。

At present, the primers widely used on motor train units belong to tile two-component epoxy system. Because the epoxy system is highly rigid and lacks toughness, when used on motor train units running in high and cold regions, it might have problems such as cracking and loss of adhesion, causing the train body to lose coating protection. This research task significantly improves epoxy primer layers＇ toughness and low temperature resistance through introducing the prepolymer of CTBN and epoxy resin. Meanwhile, epoxy primers have good storage stability.