摘要
通常防腐涂层由富锌粉环氧底漆和聚氨酯面漆组成,聚氨酯面漆是第一层防护涂层,其防护性能直接决定了防腐涂层优劣。另外,现有防腐涂层在湿热环境使用寿命较短,这主要根源在于现有聚氨酯面漆在湿热环境下容易降解破坏。为此,研究开发了一种新型高耐湿热的聚氨酯面漆,主要由NL387-6-70聚酯树脂、PVR-102聚酯树脂、TiO2纳米粒子和固化剂组成,并通过表征该涂层高压湿热加速老化前后的附着力、黏接力和红外光谱图,研究了组分配方与耐湿热之间关系。研究结果显示,NL387-6-70聚酯树脂和PVR-102聚酯树脂比例为3∶1,涂料与固化剂质量比例为15∶1时涂层抗湿热抗老化性能最好,PCT前后的平均剥离力分别可以达到137和66 N,划格试验等级都为0级。这些研究不仅证明制备得到一种新型高耐湿热的防腐面漆,且为进一步设计制备在复杂环境中使用的防腐涂层提供新思路。
Conventional anti-corrosion coatings typically consist of a zinc-rich epoxy primer and a polyurethane topcoat.As the first protective layer,the performance of the polyurethane topcoat directly determines the overall quality of the anti-corrosion system.However,existing coatings exhibit short service lives in humid-heat environments,primarily due to the degradation of polyurethane topcoats under such conditions.To address this,this study developed a novel high hydrothermal-resistant polyurethane topcoat using NL387-6-70 polyester resin,PVR-102 polyester resin,TiO_(2) nanoparticles,and a curing agent.The relationship between component ratios and hydrothermal resistance was investigated by characterizing adhesion,bonding strength,and FTIR spectra before and after high-pressure humid-heat accelerated aging.Results demonstrated that the optimal formulation(NL387-6-70/PVR-102 resin ratio of 3∶1 and coating/curing agent mass ratio of 15∶1)achieved superior performance:average peel forces of 137 N and 66 N before and after pressure cooker testing(PCT),and grade 0 in cross-cut adhesion tests.This work not only provides a novel high hydrothermal-resistant topcoat but also offers insights for designing durable coatings in complex environments.
作者
焦刚伟
徐会文
魏华成
金显贺
花超
孙友谊
JIAO Gangwei;XU Huiwen;WEI Huacheng;JING Xianhe;HUA Chao;SUN Youyi(School of Materials Science and Engineering,North University of China,Taiyuan 030051,China;Taiyuan Heavy Industry Rail Transit Equipment Co.,LTD.,Taiyuan,Shanxi,030032,China;Changzhou Polyene New Material Technology Co.,LTD.,Changzhou 213000,China)
出处
《功能材料》
北大核心
2025年第11期11153-11158,11165,共7页
Journal of Functional Materials
基金
山西省基础研究计划联合资助项目(太重)(TZLH20230818009)
山西省成果转化项目(202204021301049,202304021301030)
山西省科技创新团队专项基金项目(202204051001006)。
关键词
聚氨酯
涂层
耐湿热
高粘附力
polyurethane
coating
moisture and heat resistance
high adhesion
