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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis and properties ofUV-curablewaterborne urethane modified acrylic coatings with varying vinyl content
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Synthesis and properties ofUV-curablewaterborne urethane modified acrylic coatings with varying vinyl content

机译：不同乙烯基含量的uv固化丙酸氨基乙烷改性丙烯酸涂层的合成与性能

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摘要

It has been an effective method to improve the metal protective performance of UV-curable waterborne coatings by increasing the crosslinking degree. Hence, a series of UV-curable waterborne urethane modified acrylic (UV-WUA) coatings with different vinyl content were prepared. Firstly, a functional prepolymer containing carboxyl and hydroxyl groups was synthesized by free radical copolymerization (FRCP) using acrylic acid (AA), 2-hydroxyethyl acrylate (HEA), methyl methacrylate (MMA) and butyl acrylate (BA). Next, it was grafted with different amounts of semi-adduct of isophorone diisocyanate (IPDI) and HEA (IPDI-HEA), and finally neutralized and hydrated, obtaining UV-WUA dispersions which were then cured by UV to acquire cured films and coatings. Meanwhile, molecular structures, molecular weights, particle sizes, and Zeta potentials were characterized. Then, the heat resistance, mechanical performance, adhesion and the pencil hardness of the coatings were also investigated. Moreover, their protective performance was tested by electrochemical methods, and the surface morphology was analyzed by atomic force microscopy. The results showed that the coating had desirable comprehensive performance when vinyl content reached 0.86 mmol center dot g(-1).
机译：通过增加交联度，它是通过增加交联度提高UV固化水性涂层的金属保护性能的有效方法。因此，制备一系列具有不同乙烯基含量的UV固化水性氨基甲酸酯改性丙烯酸（UV-WUA）涂层。首先，使用丙烯酸（AA），2-羟乙基丙烯酸甲酯（HEA），甲基丙烯酸甲酯（MMA）和丙烯酸丁酯（BA），通过自由基共聚合（FRCP）合成含有羧基和羟基的含羧基和羟基的功能预聚物。接下来，将其嫁接不同量的异佛尔酮二异氰酸酯（IPDI）和HEA（IPDI-HEA），并最终中和和水合，获得通过UV固化的UV-WUA分散体，以获得固化的膜和涂层。同时，特征在于分子结构，分子量，粒度和Zeta电位。然后，还研究了涂料的耐热性，机械性能，粘附性和铅笔硬度。此外，通过电化学方法测试其保护性能，并通过原子力显微镜分析表面形态。结果表明，当乙烯基含量达到0.86mmol中心点G（-1）时，涂层具有理想的综合性能。

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