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首页> 外文期刊>Corrosion Engineering, Science and Technology >Corrosion protection properties of new UV curable waterborne urethane acrylic coatings
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Corrosion protection properties of new UV curable waterborne urethane acrylic coatings

机译：新型紫外线固化水性聚氨酯丙烯酸涂料的防腐性能

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摘要

Looking to the development of sustainable and low impact chemical technologies, water based paints offer significant advantage especially for in field applications, where the problem of solvent emission is really stringent. Some water based coatings are represented by alkyd and epoxy paints, capable of cross-linking either by auto-oxidation or with polyamines. Polyurethane aqueous dispersions are finding wide acceptance due to their better durability, adhesion and mechanical properties. The research presented here describes the design, application and characterisation of well defined model structures of waterborne UV curing coatings. The waterborne resins used in this work are segmented anionomeric polyurethanes functionalised with acrylic end groups: they were prepared from polytetramethylene glycol, isophorone diisocyanate, dimethylol propionic acid, and hydroxyethylacrylate. The preliminary results concerning the corrosion protection properties of the new UV curable waterborne coatings applied onto metallic substrates are very promising and were obtained by using electrochemical techniques. Water uptake is the critical process determining the corrosion performance. In particular the necessity to formulate the coating starting from higher molecular weight polytetramethylene glycol for good barrier properties is evident from the electrochemical impedance spectroscopy data.
机译：展望可持续和低影响的化学技术的发展，水性涂料具有显着的优势，特别是对于溶剂排放问题非常严格的现场应用。一些水性涂料以醇酸和环氧涂料为代表，能够通过自氧化或与多胺交联。聚氨酯水分散体因其更好的耐久性，附着力和机械性能而被广泛接受。本文介绍的研究描述了水性UV固化涂料的定义明确的模型结构的设计，应用和表征。在这项工作中使用的水性树脂是用丙烯酸端基官能化的分段阴离子型聚氨酯：它们是由聚丁二醇，异佛尔酮二异氰酸酯，二羟甲基丙酸和丙烯酸羟乙酯制备的。有关将新的可紫外固化的水性涂料应用于金属基材的防腐性能的初步结果是非常有希望的，并且是通过使用电化学技术获得的。吸水率是决定腐蚀性能的关键过程。特别是从电化学阻抗谱数据可以明显看出，为了获得良好的阻隔性能，必须从较高分子量的聚丁二醇开始配制涂料。

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