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Synthesis of Silicone-Acrylic Resins and Their Applications to Superweatherable Coatings

机译:硅丙烯酸树脂的合成及其在耐候涂料中的应用

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Silicone-acrylic resins were synthesized to prepare superweatherable paints for building materials. The raw materials used were n-butyl acrylate, methyl methacrylate, and n-butyl methacrylate as acrylic monomers and 3-methacryloxypro-pyltrimethoxysilane(MPTS) as a silicone monomer reactive with the acrylic monomers. Acrylic copolymers were synthesized such that their glass-transition temperatures were adjusted to 30°C and their MPTS contents were varied to 10, 20, and 30 wt %. As the content of silicone and MPTS increased, average molecular weight and viscosity increased, and thermal stability at high temperatures improved. When we tested the properties of coatings by blending the synthesized silicone-acrylic resins with a white pigment, adhesion was superior with various substrates., and their properties were suitable on the whole. Weatherability was tested by an outdoor exposure test with a weather-ometer and an accelerated weathering tester, and their results showed that silicone-acrylic resin composed of 30 wt % MPTS was a superweatherable coating.
机译:合成了有机硅丙烯酸树脂以制备用于建筑材料的耐候性涂料。所使用的原材料是丙烯酸正丁酯,甲基丙烯酸甲酯和甲基丙烯酸正丁酯作为丙烯酸单体,以及3-甲基丙烯酰氧基丙基三甲氧基硅烷(MPTS)作为可与丙烯酸单体反应的有机硅单体。合成丙烯酸共聚物,使得其玻璃化转变温度调节至30℃,并且其MPTS含量变化至10、20和30重量%。随着硅酮和MPTS含量的增加,平均分子量和粘度增加,并且高温下的热稳定性得到改善。当我们通过将合成的有机硅-丙烯酸树脂与白色颜料共混来测试涂料的性能时,与各种基材的附着力都非常好,并且它们的性能总体上很合适。耐候性通过使用耐候计和加速耐候性测试仪的户外暴露测试进行测试,其结果表明由30重量%MPTS组成的有机硅-丙烯酸树脂是超耐候性涂料。

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