
科学视点
第41卷第8期 2011年8月
工修架
PAINT & COATINGS INDUSTRY
水性光固化涂料研究进展
姚永平,崔艳艳,董智赞,刘晓暄
(广东工业大学材料与能源学院高分子材料与工程系,广州510006)
Vol.41No.8 Aug.2011
摘要:光固化水性涂料是一种新型环保涂料,它综合了传统UV固化技术和水性涂料技术的许多优点,近年来已成为非常活跃的研发领域。本文综述了水性光固化涂料的特点、组成、作用、基本性能,与传统油性光固化涂料相比,最突出的优点就是从根本上解决了传统光固化涂料硬度和柔韧性之间的矛盾。本文重点讨论了水性UV树脂、水性光引发剂的分类以及发展状况和研究进展,并介绍了水性光固化涂料的应用现状与发展趋势,同时指出了该技术存在的主要间题和改进方向。
关键调:UV围化涂料:水性树脂;水性光引发剂;柔韧性;硬度
中图分类号:TQ630.4
文章编号:02534312(2011)08007406
文献标识码:A
Progress of Waterborne UV-Curable Coatings
Yao Yongping, Cui Yanyan, Dong Zhixian, Liu Xiaoxuan
(Department of Polymeric Material and Engineering,College of Material and Energy,
Guangdong Unitersity of Technology,Guangzhou 510006, China)
Abstract: Waterborme UV - curable coatings is a novel type of environmental friendly coatings. It com-bines many advantages of the traditional UV curable technology and the waterborme coatings technology, which has become an active research focus, This paper reviewed the characteristics, composition, functions and basic performances of waterbormne UV - curable coatings, Compared to the traditional oil - based UV -curable coatings, the waterborne UV - curable coatings showed the most prominent advantage which gave a fundamental solution to the contradiction between hardness and flexibility of the traditional UV - cured coat-ings. The paper focused on the classification, the development and research progress of waterborme UV curable resin and photoinitiator. In addition, the application and development trend of waterbome UV - cur-able coatings were discussed. The existing problems of waterborne UV - curable coatings and improvement were also pointed out.
Key Words:UV - curable coatings; waterbome resin; waterbome photoinitiator; flexibility: hardness
紫外光固化技术是20世纪60年代开发的涂料涂装新技术,有快速固化、节能省时、低落剂释放、固化温度低、设备体积小、投资低等优点[1-3]。但是,由于紫外光固化涂料所用的主要成分即预聚体一般具有较高的黏度,涂装时,特别是喷涂时,必须加人活性稀释剂(reactivediluent)以调节其黏度,有时基至加入有机溶剂,以改善其流变性。这些活性稀释剂大部分具有强烈的气味,其中某些物质对环境和人体健康有害,而且许多活性单体在紫外光固化过程中难以完全反应,其残留物的可渗透性有可能会影响固化产品的卫生安全指标和长期使用性能。因此UV固化涂料技术总的发展趋势是以水代替活性稀释剂。水性光固化涂料维承和发展了传统UV固化技术和水性涂料技术的许多优点,获到了较快的发展,具有广阔的市场需求和应用前景。
水性光固化涂料的特点
水性光固化涂料结合了传统UV固化涂料和水性涂料的特点,突出了环保和高效性,与传统溶剂型光固化涂料相比具有以下特点:①用水代替活性稀释剂,调节光固化体系的黏度和流变性,实现无活性稀释剂配方,解决了低VOC排放、低毒性和减少刺激性等环保问题;(②)具有潜在的无害喷涂的应用前景;③降低了涂料的易燃性;④设备、容器易用水冲洗干净:5降低固化膜的收缩率,改善了涂层对非吸收性底材的着性:6在固化前途层就处于能用手触摸模的表干状态,可进行表面修饰和易堆放存忙:?可在低黏度的条件下施工,如喷涂、辑涂和淋涂涂徐置方法,可得到超薄的固化膜
【基全项目】广东省教育部产学研专项基会项路(教准号:20094420110006)资助 74