纳米二氧化硅改性环氧涂料在建筑护栏中的防护应用  

Application of nano-SiO_2 modified epoxy coating to the protection of building guardrail

作　　者：钟萍[1,2] 钟银花 袁兴 

机构地区：[1]广东科富科技股份有限公司,广东佛山528200 [2]湖南工程学院化学化工学院,湖南湘潭411104

出　　处：《电镀与涂饰》2014年第6期243-246,共4页Electroplating & Finishing

基　　金：粤港关键领域重点突破项目(2001BZ100182)

摘　　要：纳米二氧化硅改性环氧树脂涂料因在树脂分子链中引入了Si─O柔性链段和富有弹性的网状硅氧四面体结构,使得涂层的柔韧性和附着力得到显著改善,防腐蚀性能提高。以纳米二氧化硅改性环氧涂料为底漆、丙烯酸聚氨酯涂料为面漆,应用于海南某高级酒店护栏的防护中,详细介绍了涂层体系的施工工艺,包括底材前处理、喷涂纳米二氧化硅改性环氧底漆、刮涂腻子层、喷涂丙烯酸聚氨酯面漆以及修补,测试了复合涂层的性能。结果表明,该复合涂层附着力1级,冲击强度≥50 kg·cm,柔韧性≤1 mm,硬度≥2H,耐盐雾腐蚀时间≥3 000 h,耐人工加速老化时间≥1 000 h。该涂层配套体系在酒店护栏上使用一年后,涂层无失光、变色等现象,显示出优异的防护性能和装饰性能。The nano-SiO2 modified epoxy coating has improved flexibility, adhesion strength, and corrosion resistance due to the introduction of flexible Si--O chain segment and elastic mesh-like silicon-oxygen tetrahedron structure into the molecular chain of resin. In the paper, a nano-SiO2 modified epoxy coating as primer and an acrylic polyurethane as topcoat were applied to the protection of guardrails of a high-class hotel in Hainan. The construction process of the coating system was introduced in detail, including substrate pretreatment, spraying nano-SiO2 modified epoxy primer, puttying, spraying acrylic polyurethane topcoat, and finishing. The performance of the composite coating was tested as follows： adhesion strength 1-grade, impact strength 〉50 kg.cm, flexibility 〈1 mm, pencil hardness 〉2H, salt spray corrosion resistance 〉3 000 h, and artificially accelerated aging time 〉1 000 h. The coatingsystem which has been applied to guardrails of the hotel for one year does not loss luster and discolor, presenting excellent protective and decorative properties.

关 键 词：建筑护栏 防腐 环氧 丙烯酸聚氨酯 纳米二氧化硅 改性 

分 类 号：TQ639.2[化学工程—精细化工]