薄涂高流平HAA固化聚酯粉末涂料的制备及性能研究  

Preparation and Properties of High Leveling Thin-Film HAA-Based Polyester Powder Coatings

作　　者：朱新平 刘卫 黄焯轩 吴严明 张海萍[2] 张辉 Zhu Xinping;Liu Wei;Huang Zhuoxuan;Wu Yanming;Zhang Haiping;Zhanghui(Guangdong Wesdon-Rivers Institute of Powder Coatings Science and Technology Co.,Ltd.,Foshan,Guangdong 528200,China;School of Chemical Engineering,Tianjin University,Tianjin 300072,China)

机构地区：[1]广东西敦千江粉漆科学研究有限公司,广东佛山528200 [2]天津化学化工协同创新中心,天津大学化工学院,天津300072

出　　处：《涂层与防护》2023年第2期39-44,共6页Coating and Protection

摘　　要：制备了一种薄涂高流平β-羟烷基酰胺(HAA)固化聚酯粉末涂料。目前,HAA固化聚酯粉末涂料主要存在两个问题:1)厚涂时易出现针孔;2)薄涂时涂膜流平性不佳。本研究首先筛选了适合制备高流平无针孔的聚酯树脂;然后为了实现薄涂,对HAA固化聚酯粉末的粉碎设备进行改进,将HAA固化聚酯粉末颗粒的中位径减小至25μm以下,且具有较窄的粒径分布,进一步减少了涂膜表面针孔且降低了粉末使用成本;最后使用高效流动助剂,使其流动性得到进一步提高。通过对比本文制备的薄涂高流平HAA固化聚酯粉末涂料与市售常规HAA固化聚酯粉末涂料,证明了薄涂高流平HAA固化聚酯粉末涂料在粒径及粒径分布、流动性、喷涂及涂膜性能方面的优越性。A polyester powder coating with high leveling and thin film based on HAA is prepared by selecting the proper polyester resin. In additon, the crushing machine is modified so that the particle size of HAA-based polyester powder coatings can be decreased to 25 μm and less,and the particle size distribution is narrow. Thus the film defect(i.e., pinhole) and the cost are reduced. The high efficiency leveling agent is used to improve the leveling property of the powder coatings. By means of comparing the prepared HAA-based powder coatings and the commercialized HAA-based powder coatings, it is revealed that the prepared powder coatings have better properties in terms of paricle size and its distribution, leveling and film performance, etc.

关 键 词：薄涂 HAA 粒径 流动性 

分 类 号：TQ630.7[化学工程—精细化工]