Abstract: By using polyvinyl chloride（PVC）paste resin coupled vinyl acetate modified polyvinyl chloride paste resin（vinyl chloride-vinyl acetate copolymer）， high elastic anticorrosive coatings was prepared for freight train，which always works in a harsh environment. By investing the effects of three PVC paste resins produced by different polymerization techniques on the viscosity，tensile property，impact resistance and cup drawing test results of the anticorrosive coatings，PVC paste resins produced by the seeded emulsionpolymerization process were selected as the main resins. By adding an appropriate amount ofchloroacetate copolymerized paste resin to the coating system，the impact resistance of thecoating can be improved without reducing the tensile strength of the coating. Furthermore，by using a special polyamide adhesion promoter，the adhesive strength of this coating to the freight train body had been improved. 

Key words: polyvinyl chloride paste resin, anticorrosive coatings, freight train, impact resistance, vinyl chloride-vinyl acetate copolymer

摘要： 以聚氯乙烯（ PVC）糊树脂和醋酸乙烯酯改性的聚氯乙烯糊树脂（氯醋共聚糊树脂）为主体树脂，制备了一种适用于铁路货车恶劣装卸工况的高弹性防腐涂料。通过研究 3种聚合工艺生产的 PVC糊树脂对防腐涂料黏度、拉伸性能、耐冲击性和杯突实验结果的影响，选择了种子乳液聚合工艺生产的 PVC糊树脂作为主体树脂。通过向涂料体系中加入适量的氯醋共聚糊树脂，可以在不降低涂料拉伸强度的条件下，提高涂料耐冲击性。此外，通过加入一定量特殊的聚酰胺类 PVC专用附着力促进剂，提高了涂料对铁路货车车体的附着力。

关键词: PVC糊树脂, 防腐涂料, 铁路货车, 耐冲击性, 氯醋共聚糊树脂

CLC Number: 

• TQ635. 2