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首页> 外文期刊>Progress in Organic Coatings: An International Review Journal >Silicone-acrylic hybrid aqueous dispersions of core-shell particle structure and corresponding silicone-acrylic nanopowders designed for modification of powder coatings and plastics. Part III: Effect of modification with selected silicone-acrylic nanopowders on properties of polyurethane powder coatings
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Silicone-acrylic hybrid aqueous dispersions of core-shell particle structure and corresponding silicone-acrylic nanopowders designed for modification of powder coatings and plastics. Part III: Effect of modification with selected silicone-acrylic nanopowders on properties of polyurethane powder coatings

机译：核-壳颗粒结构的有机硅-丙烯酸杂化水分散体和相应的有机硅-丙烯酸纳米粉，设计用于粉末涂料和塑料的改性。第三部分：选择的有机硅丙烯酸纳米粉对聚氨酯粉末涂料性能的影响

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摘要

Polyurethane powder coating systems consisting of polyester resin, blocked polyisocyanate and two types of "nanopowders" containing core-shell nanoparticles where the core was silicone resin of very low glass transition temperature and the shell was poly(methyl methacrylate) were examined. The blocked polyisocyanate was synthesized using biuretpolyisocyanate obtained from ureapolyisocyanate as starting material capable for blocking and epsilon-caprolactam as blocking agent. The surface properties of cured powder coatings were investigated using scanning electron microscopy (SEM) combined with energy dispersive spectrometry (Ens), X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). The surface structure was correlated with the chemical structure of the coatings and macroscopic surface behavior: contact angle, surface free energy, gloss, abrasion resistance, hardness and adhesion to the steel surface. (C) 2014 Elsevier B.V. All rights reserved.
机译：检验了由聚酯树脂，嵌段多异氰酸酯和两种包含核壳纳米粒子的“纳米粉末”组成的聚氨酯粉末涂料体系，其中核是玻璃化转变温度非常低的有机硅树脂，而壳是聚甲基丙烯酸甲酯。使用由脲多异氰酸酯获得的缩二脲多异氰酸酯作为能够封端的起始原料和ε-己内酰胺作为封端剂来合成封端的多异氰酸酯。使用扫描电子显微镜（SEM）结合能量色散光谱（Ens），X射线光电子能谱（XPS）和原子力显微镜（AFM）研究了固化粉末涂料的表面性能。表面结构与涂层的化学结构和宏观的表面行为相关：接触角，表面自由能，光泽度，耐磨性，硬度和对钢表面的附着力。 （C）2014 Elsevier B.V.保留所有权利。

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