摘要
用国产水性环氧树脂分散体HD-E251A与水性环氧树脂固化剂CU600为主要成膜物,选择合适的助剂配制出了一种性能优良的低VOC双组分水性环氧树脂涂料。研究了环氧与活泼氢当量比、不同种类及用量的流变助剂和颜填料体积浓度对涂膜性能的影响。结果表明,当环氧与活泼氢当量比为1.3∶1、缔合型聚氨酯流变助剂和气相二氧化硅复配,m(缔合型聚氨酯)=0.2%、m(气相二氧化硅)=0.5%、颜填料体积浓度为35%时,所得水性环氧树脂涂料的贮存稳定性较好,施工性能优异;VOC 60 g/L;涂膜光泽度82;硬度2H;柔韧性1级;耐冲击性50 cm;耐中性盐雾1200 h。
A kind of low-VOC 2K waterborne epoxy coating with excellent performance is prepared by using domestic waterborne epoxy resin dispersion HD-E251A and waterborne epoxy resin curing agent CU600 and selecting suitable additives.The effects of different kinds and dosages of rheological AIDS,the equivalent ratio of epoxy to active hydrogen and the volume concentration of pigments and fillers on the properties of the film are studied.The results show that the waterborne epoxy coating has good storage stability and excellent construction performance when the equivalent ratio of epoxy to active hydrogen is 1.3:1,the rheological assistant of associating polyurethane and fumed silica are compounded,m(associating polyurethane)is 0.2%,m(fumed silica)is 0.5%,and the volume concentration of pigment and filler is 35%.Specifically,the coating shows VOC 60g/L,gloss 82,hardness 2h,flexibility level 1,impact resistance 50 kg/cm and neutral salt spray resistance 1,200 h.
作者
于国玲
陈宛瑶
王学克
张继芳
薛森堂
李顺霞
Yu Guoling;Chen Wanyao;Wang Xueke;Zhang Jifang;Xue Sentang;Li Shunxia(Nanyang Agricultural Vocational College,Nanyang,Henan 473000,China;School of biology and chemical engineering,Nanyang Institute of technology,Nanyang,Henan 473000,China;Nanyang Water Based Environmental Protection Coating Engineering Technology Research Center,Nanyang,Henan 473000,China;Nanyang Wolong Paint Co.,Ltd.,Nanyang,Henan 473000,China)
出处
《涂层与防护》
2020年第4期14-17,39,共5页
Coating and Protection
关键词
低VOC
水性环氧树脂
环氧树脂涂料
双组分
流变助剂
环氧与活泼氢当量比
颜填料体积浓度
Low VOC
waterborne epoxy resin
epoxy resin coating
2K
rheological AIDS
equivalent ratio of epoxy to active hydrogen
volume concentration of pigments and fillers
