羟基丙烯酸乳液在水性双组分聚氨酯涂料中的应用  

Application of Hydroxyl Acrylic Emulsion in Two-Component Waterborne Polyurethane Coatings

作　　者：张发爱[1] 余彩莉[1] 王云普[2] 

机构地区：[1]桂林工学院材料与化学工程系有色金属材料及其加工新技术教育部重点实验室,541004 [2]西北师范大学化学化工学院,兰州730070

出　　处：《涂料工业》2006年第5期5-8,共4页Paint & Coatings Industry

基　　金：桂林工学院博士基金和广西教育厅科研项目(200508041)

摘　　要：用羟基丙烯酸乳液作为羟基组分与亲水改性多异氰酸酯配漆,制备水性双组分聚氨酯涂料。研究了丙烯酸乳液中乳化剂用量、羟值、酸值、n(—NCO)∶n(—OH)对漆膜性能的影响,得到了最佳的应用配方:乳化剂用量在1%以下,羟值为100 mgKOH/g,酸值在15 mgKOH/g以下,n(—NCO)∶n(—OH)=1.5∶1。用红外光谱仪(FT-IR)表征固化前后膜的结构,表明大部分乳液聚合物已经与多异氰酸酯反应,但还有部分异氰酸酯没有反应。A two- component waterborne polyurethane （2K WBPU） coatings were prepared with hydroxyl acrylic emulsions as hydroxyl component and hydrophilically modified polyisocyanate as curing agent. The effect of amount of emulsifier, hydroxyl value and acid value of the acrylic emulsion, n （--NCO） ： n （--OH） on the film properties of 2K WBPU coatings were investigated. The optimum composition of the acrylic emulsion was obtained from these results, that is ： amount of emulsifier lower than 1%, based on monomer weight, hydroxyl value 100 mgKOH/g, acid value lower than 15 mgKOH/g, n（--NCO）： n（--OH） =1.5： 1. Infrared spectra （IR） were used to characterize its structure before and after curing, Which indica- ted the exist of some unreacted --NCO groups.

关 键 词：水性聚氨酯涂料 双组分涂料 羟基丙烯酸乳液 

分 类 号：TQ630.7[化学工程—精细化工]