摘要
【目的】采用自制的封闭型多异氰酸酯固化剂,开发高性能光热太阳能镜背涂料。【方法】以脂肪族六亚甲基二异氰酸酯(HDI)、三羟甲基丙烷(TMP)、3,5-二甲基吡唑为原料合成封闭型多异氰酸酯固化剂。配合功能型聚酯面漆,制备单组分镜背涂料,研究该涂料在光热太阳能镜镜背上的应用性能。【结果】当n(—NCO)∶n(—OH)为0.8∶1时,满足170℃/3 min的快速固化要求。固化后的漆膜铅笔硬度、柔韧性、耐冲击性、耐磨性等优异。耐人工气候老化4000 h后漆膜无开裂、粉化,耐5%中性盐雾2000 h后漆膜无边缘腐蚀,漆膜耐温变、耐湿热性能均可达到技术要求。【结论】该光热太阳能镜背涂料性能优异,应用前景广泛。
[Objective]To develop a high-performance coatings for the backside of solar thermal mirrors using a self-made blocked polyisocyanate curing agent.[Methods]The blocked polyisocyanate curings agent was synthesized using aliphatic hexamethylene diisocyanate(HDI),trimethylolpropane(TMP),and 3,5-dimethylpyrazole as raw materials.A one-component mirror back coatings was prepared with functional polyester topcoat,and the application performance of this coating on the back of solar thermal mirrors was studied.[Results]When the ratio of n(—NCO)to n(—OH)was set at 0.8,the coatings met the requirement of rapid curing at 170℃for 3 minutes.The cured paint film exhibited excellent mechanical properties such as pencil hardness,flexibility,impact resistance and abrasion resistance.After 4000 h of artificial weathering test,the paint film showed no cracking or chalking.After 2000 h of 5%neutral salt spray test,the paint film displayed no edge corrosion.Both of the technical requirements for temperature change resistance and heat and humidity resistance of the paint film were met.[Conclusion]This solar thermal mirror back coating has excellent performance and broad application prospects.
作者
汪辉辉
王李军
李文凯
郭亮亮
周如东
孔德成
李娜
WANG Huihui;WANG Lijun;LI Wenkai;GUO Liangliang;ZHOU Rudong;KONG Decheng;LI Na(CNOOC Changzhou Paint&Coatings Industry Research Institute Co.,Ltd.,Changzhou,Jiangsu 213016,China;National Engineering Research Center for Coatings,Changzhou,Jiangsu 213016,China)
出处
《涂料工业》
2026年第1期62-66,共5页
Paint & Coatings Industry
基金
中国海洋石油集团有限公司科研平台建设项目(KJPT-2023-0003)。
关键词
光热太阳能镜
镜背涂料
封闭型多异氰酸酯固化剂
聚酯面漆
单组分烘烤固化
solar thermal mirror
mirror back coatings
blocked polyisocyanate curing agent
polyester topcoat
one-component baking and curing
