提高汽车水性涂料的光稳定性是一项艰巨的任务

Tom Landuydt
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引用次数: 0

摘要

涂料制造商目前面临的最重要挑战之一是减少配方中的挥发性有机化合物(VOC)。作为一种潜在的降低VOC的合规技术,水性透明涂层预计将在未来几年得到大力发展。必须说明的是,在汽车工业中,这些水性透明涂层的光稳定性能的任何损害都是不可接受的。由于缺乏将光稳定剂(通常是疏水性物质)有效且均匀地掺入水性透明涂层的技术,解决这一问题的新产品形式已成为强制性的。利用新型封装添加剂技术(NEAT)微封装技术,开发了水相容产品形式的不溶性疏水添加剂,取得了一定的进展。NEAT能够开发用于汽车应用的水性透明涂层,其性能水平与当前最先进的溶剂型系统相同。通过这种新颖的封装技术,可以在水系统中使用最好的UVA和HALS。NEAT光稳定剂的容易掺入不需要共溶剂。NEAT光稳定剂提供了一个永久的保护,因为它具有很高的耐冲刷性,并且不会对透明度和光泽产生负面影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Improvement of the Light Stability of Automotive Water Borne Coatings: a Difficult Task
One of the most important current challenges for paint manufacturers is the reduction of volatile organic compounds ( VOC ) in their formulations. As a potential compliant technology for VOC reduction, water borne clear coats are predicted to develop strongly over the coming years. It must be stated that any impairment of the light stabilising performance of these water borne clear coats is unacceptable in the automotive industry. Due to the lack of techniques for the effective and homogeneous incorporation of light stabilisers, which are in general hydrophobic substances, into water borne clear coats, new product forms addressing this issue have become mandatory. Progress has been made with the development of water compatible product forms of water insoluble hydrophobic additives by using a Novel Encapsulated Additives Technology ( NEAT ) micro encapsulation techniques. NEAT enables the development of water borne clear coats for automotive application that show the same performance level as current state of the art solvent borne systems. By this novel encapsulation technology, the best UVA’s and HALS are made available for use in aqueous systems. The easy incorporation of the NEAT light stabilizers requires no need for co-solvents. NEAT light stabilizers offer a permanent protection due to a high wash-out resistance and they do not show a negative influence on transparency and gloss.
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