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首页> 外文期刊>Arabian Journal for Science and Engineering >Optimization of Self-Healing Automotive PU Coating Using Desmodure N3800 as Isocyanate and the Different Desmophens as Polyalcohols
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Optimization of Self-Healing Automotive PU Coating Using Desmodure N3800 as Isocyanate and the Different Desmophens as Polyalcohols

机译：以Desmodure N3800为异氰酸酯和不同Desmophenes为多元醇的自修复汽车PU涂层的优化

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摘要

An isocyanate agent (Desmodure N3800) and three polyalcohol agents (Desmophen 670BA, 1800 and A665, respectively) were used for formulation of the poly-urethane coating with self-healing property. The effect of the chain extender agent (ethylene glycol) and the optimum ratio of the isocyanate to polyalcohol agent were studied. The obtained results show that a hard polymer coating is obtained using Desmophen A665 polyalcohol in the absence of any chain extender; however, a corrosion resistant and transparent coating is obtained using Desmophen 1800 and a ratio of NCO/OH = 2 for pre-polymer formation stage and NCO/OH = 0.85 in polymerization stage by adding proper amount of ethylene glycol. This obtained PU shows the best self-healing properties.
机译：异氰酸酯剂（Desmodure N3800）和三种多元醇剂（分别为Desmophen 670BA，1800和A665）用于配制具有自修复性能的聚氨酯涂料。研究了扩链剂（乙二醇）的作用以及异氰酸酯与多元醇试剂的最佳比例。获得的结果表明，在不存在任何扩链剂的情况下，使用Desmophen A665多元醇可获得硬质聚合物涂层。但是，通过使用适量的乙二醇，使用Desmophen 1800和预聚物形成阶段的NCO / OH = 2，聚合阶段的NCO / OH = 0.85可获得耐腐蚀和透明的涂层。所获得的PU显示出最佳的自我修复性能。

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