摘要
首先制备了PUD-SH[多巯基封端的PU(聚氨酯)水分散体]和水性EP(环氧树脂),然后将两者按n(巯基)∶n(环氧基)=1∶1复合,并在不同温度时成膜,制得厚度约100μm的复合固化涂层。研究结果表明:PUD-SH和水性EP之间发生了环氧基开环反应,固化后复合涂层透明柔韧,其凝胶量接近100%,涂层的吸水率<17.50%,硬度>6H,耐甲乙酮擦拭次数>1 600次;固化时叔胺促进剂的存在可有效提高复合固化涂层的固化度,缩短其固化时间,但对其他性能影响甚微。
The PUD-SH（muhi-thiol-terminated polyurethane water-dispersoid） and waterborne EP（epoxy resin） were prepared,then the both were blended according to molar ratio of n（-SH）：n（epoxy group） was 1：1 ,and the films at different temperatures and composite curing coats （thickness 100 μm） were prepared. The research results showed that the epoxy group ring-opening reaction between PUD-SH and waterborne EP was arisesed. The transparent and flexible composite curing coats had some characteristics such as gel close to 100% ,water absorption less than 17.50% ,hardness more than 6H,and wiping frequency of MEK-resistance more than 1 600 times. The tertiary amine accelerant could effectively improve curing degree for composite curing coat, shorten its curing time,but influences of tertiary amine accelerant on other properties was little.
出处
《中国胶粘剂》
CAS
北大核心
2011年第12期9-12,共4页
China Adhesives
基金
国家自然科学基金项目(51063002)
江西省教育厅青年科学基金项目(GJJ09575)
关键词
多巯基封端的聚氨酯水分散体
水性环氧树脂
固化剂
低温固化
muhi-thiol-terminated polyurethane water-dispersoid （PUD-SH）
waterborne epoxy resin
curing agent
low-temperature curing
