共查询到16条相似文献,搜索用时 312 毫秒
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为了得到一种水性涂料和溶剂型涂料通用的漆雾凝聚剂,以三聚氰胺、甲醛为原料,分别以丙烯酰胺、二甲胺为改性剂制备脱粘剂 A剂。通过对比实验,确定了 A剂的更优改性剂为丙烯酰胺;三聚氰胺、甲醛、丙烯酰胺的最佳反应的物质的量之比为 1∶3∶2;羟甲基化阶段 pH为 8~9,反应温度为 75 ℃;缩聚阶段 pH为 4左右;反应温度为 45 ℃。并且以改性聚丙烯酰胺( PAM)为 B剂,确定了新型通用漆雾凝聚剂的 A、B剂最佳投料质量比为 1∶1。结果表明:该新型漆雾凝聚剂的浊度去除率能达到 99%,药剂成本下降了 14. 8%。无论从产品的性价比还是环境友好等方面均明显优于市售的漆雾凝聚剂,具有明显的经济效益和生态效益。 相似文献
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近年来,随着科技和经济的发展,人民生活水平日益提高,我国汽车保有量大幅提升,汽车产业飞速发展。高速发展的汽车产业带来了大量的涂装废水,严重危害了人类身体健康和生态环境。总结了近年来国内外涂装废水漆雾絮凝剂研究进展。相关研究通过对传统破黏剂(A剂)和絮凝剂(B剂)进行改性,调节使用条件,提高漆雾絮凝剂的絮凝效果。常用的A剂一般以三聚氰胺和甲醛为原料进行制备,B剂一般为改性的聚丙烯酰胺,当两者投放比控制在1∶1~1∶2之间时,漆雾去除效果最佳。现阶段漆雾絮凝剂的漆雾去除效果基本可以达到96%左右。 相似文献
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水性溴碳环氧树脂钢结构防火涂料的研制 总被引:1,自引:0,他引:1
以TBA环氧树脂为成膜物质,配以各种助剂得到防火涂料的A组分,以自制的水性环氧固化剂为B组分,按A组分:B组分为10:1的比例得到水性TBA环氧树脂防火涂料。 相似文献
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水性罩光清漆固化反应速率对于以“湿碰湿”工艺施工的水性三涂一烘(3C1B)体系有很大影响,水性罩光清漆的固化反应速率主要由作为交联剂的氨基树脂所控制。本文对 3种不同类型的氨基树脂进行了红外表征( FT-IR),分析了其分子结构。分别以上述氨基树脂作为交联剂制备水性罩光清漆,通过旋转流变仪测试清漆在固化过程中剪切储存模量的变化,探究了上述氨基树脂对水性罩光清漆固化反应速率的影响。对比了所制备的水性罩光清漆搭配水性 3C1B中涂和色漆的漆膜性能,分析了氨基树脂对漆膜性能的影响。研究结果表明:以甲醚丁醚混合醚化的氨基树脂作为交联剂的水性罩光清漆的固化速率适用于 3C1B体系,且制备的漆膜性能最佳。 相似文献
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Two types of stoving paints have been prepared from Mesua ferrea L. seed oil (MFLSO) modified poly(urethane ester) (PUE) binder systems. One stoving paint system was prepared from partially butylated melamine formaldehyde (MF) resin modified MFLSO-based PUE (70:30 weight ratio) and other one comprised of bisphenol-A-based epoxy resin modified with MFLSO-based PUE (50:50 weight ratio). Paints made with these two resin systems as binders were evaluated against the standard paint system. The physical properties of the paint systems viz. non-volatile content, specific gravity, viscosity, drying time, flexibility, adhesion, scratch hardness, gloss, etc. and chemical properties such as corrosion resistance, salt spray resistance, UV resistance, etc. were measured as per the standard methods and were compared. Thermal stability and surface morphology of the paints were also studied by using thermogravimetric analysis (TGA) and scanning electron microscopy (SEM), respectively. The performance characteristics of both the test paints were found to be comparable with the corresponding industrial standard paints. Out of the two test paints, the epoxy modified PUE-based stoving paint has been found to be preferred. 相似文献