水性聚脲汽车清漆的研究

Study on waterborne polyurea clear coat for automobile

简要介绍了聚天门冬氨酸酯及其聚脲涂料的基本概念和发展历史。从实验室喷涂试板测试双组分水性聚脲汽车清漆的涂膜性能到车间喷涂整车车身测试水性聚脲汽车清漆的外观性能(包括膜厚、硬度、附着力、光泽、橘皮和鲜映性),说明了双组分水性聚脲清漆能够满足汽车清漆的性能和工艺要求。从聚天门冬氨酸酯树脂的分子结构和性能特征的角度,分析了双组分水性聚脲清漆能够降低烘烤温度、提高生产效率和降低VOC(挥发性有机物)排放的原因。指出水性聚脲汽车清漆还需要进一步做好开发和验证工作。

The basic concepts and development history of polyaspartate and the polyurea paint prepared based on it were introduced.The properties of an automotive two-component waterborne polyurea clear coat were tested in laboratory,and the thickness,hardness,adhesion,glossiness,orange peel effect,DOI(distinctness of image),and other properties of the clear coat sprayed as the topcoat on car body in a paint shop were examined.The results showed that the two-component waterborne polyurea clear coat meets the performance and process requirements of automotive clear coat.From the point of view of the molecular structure and characteristics of polyaspartate resin,the reason why the two-component waterborne polyurea clear coat can decrease the baking temperature,improve production efficiency,and reduce the emission of VOC(volatile organic compound)were analyzed.It was pointed out that further development and validation work is needed for application of waterborne polyurea clear coat in automotive industry.