Abstract: To make a new Si-containing epoxy acrylate（EA） nanocoating with excellent heat resistance and flame retardation，a series of UV curing new Si-containing EA nanocoatings were prepared by adding KH-570-modified nano-SiO2，organic silicon modified EA and nano-Mg(OH)2 as UV curable formula components. UV curing system’s heat resistance，flame retardant and optical properties were characterized by FTIR，UV-Vis，SEM，oxygen index instrument and TG. The result showed that UV curable nanocoating’s thermal stability and flame retardation can be improved，when the KH-570-modified nano-SiO2 was added in the organic silicone-modified EA，and its transparency still remained excellent；nanocoating’s thermal stability and flame retardation were both the best，when the content of modified nano-SiO2 reached 5%；the system's flame retardation was further improved，when nano-Mg(OH)2 was further added into above-mentioned UV formulation.

Key words: organic silicon modification, UV curable, nano-silica, epoxy acrylates(EA), nano-Mg(OH)₂

摘要： 为了制备耐热、阻燃性能优异的新型含Si环氧丙烯酸酯（EA）纳米涂层，以KH-570改性纳米SiO2和有机硅改性EA作紫外固化（UV）组分，并在配方中加入纳米Mg(OH)2，制备了系列UV固化新型含Si EA纳米涂层。通过红外光谱仪、紫外可见光谱仪、SEM、氧指数仪、热重分析仪等研究了UV固化体系涂膜耐热、阻燃及光学性能。结果表明：在有机硅改性EA中添加KH-570改性纳米SiO2，可以提高纳米涂层热稳定性和阻燃性，同时使其保持优良透明性；当改性纳米SiO2含量达5%时，涂膜耐热、阻燃性能均最佳；同时在体系中加入纳米Mg(OH)2，可进一步改善体系的阻燃效果。

关键词: 有机硅改性, 紫外固化, 纳米SiO2, 环氧丙烯酸酯, 纳米Mg(OH)2