摘要
以热固性聚酯粉末涂料为研究对象,介绍了成膜物质中聚酯树脂和固化剂的特性及其在粉末涂料中的作用,并从制备、固化机理、改性、应用4个方面综述低温固化聚酯粉末涂料的研究进展。为改善聚酯粉末涂料出现缩孔的问题,将活性官能团丙烯酸酯引入聚酯树脂中进行表面改性,得到聚酯/丙烯酸混合型粉末涂料,并对耐候性聚酯/丙烯酸粉末涂料的耐候性及固化反应原理进行概述。为降低粉末涂料的固化温度,使其符合低温固化的发展要求,针对合成聚酯粉末涂料成膜物质的相对特性,在树脂合成过程中引入环氧型官能团作为功能单体或直接与环氧树脂混合。聚酯粉末涂料已在家具、汽车及家用电器领域得到广泛应用。未来,聚酯粉末涂料朝着节能环保、多样性和更广泛的适用性发展。
Taking thermosetting polyester powder coatings as the research object,the characteristics of polyester resins and curing agents in film-forming substances and their roles in powder coatings were introduced,and the research progress of low-temperature curing polyester powder coatings was reviewed from four aspects:preparation,curing mechanism,modification and application.In order to improve the shrinkage of polyester powder coating,the active functional group acrylate was introduced into the polyester resin for surface modification,and the mixed polyester/acrylic powder coating was obtained.The weather resistance and curing reaction principle of the weatherable polyester/acrylic powder coating were summarized.In order to reduce the curing temperature of powder coatings and meet the development requirements of low-temperature curing,epoxy functional groups were introduced as functional monomers or directly mixed with epoxy resin in the process of resin synthesis according to the relative characteristics of film-forming materials of synthetic polyester powder coatings.Polyester powder coatings are widely used in furniture,automobiles and household appliances.In the future,polyester powder coatings will develop towards energy saving,environmental protection,diversity and wider applicability.
作者
王正祥
卓远航
范淑红
代文斗
刘思敏
WANG Zhengxiang;ZHUO Yuanhang;FAN Shuhong;DAI Wendou;LIU Simin(College of Packaging and Materials Engineering,Hunan University of Technology,Zhuzhou Hunan 412007,China)
出处
《包装学报》
2024年第5期83-92,共10页
Packaging Journal
关键词
低温固化
聚酯树脂
粉末涂料
环氧
丙烯酸
low temperature curing
polyester resin
powder coating
epoxy
acrylic acid
