水性丙烯酸乳液生产工艺流程
发布日期：2018-11-21
阅读量：13023
水性丙烯酸乳液制备方法
1、制备水性丙烯酸乳液：将原料中包括丙烯酸硬单体、丙烯酸软单体和丙烯酸功能单体的全部丙烯酸单体、乳化剂、水加入到预乳化釜中，乳化30～40min。得到不分层的乳化液；然后在聚合反应釜中加入剩余的水、剩余的乳化剂、缓冲剂，升温到78～80℃，投入乳化液，加入引发剂反应20～30min，滴加剩余的上述制得的所述乳化液与剩余的引发剂，3～4h滴完；接着将聚合反应釜升温至85～90℃保温反应1～2h，降温至45～50℃加入pH调节剂调节反应体系的PH值为6～7之间．即制得水性丙烯酸乳液。
水性丙烯酸乳液制备所需的常用设备
预乳化釜→滴加釜→反应釜→立式冷凝器→过滤器→搅拌釜→灌装机→
需要一套真空系统，氮气系统，水冷却系统，纯水设备
水性丙烯酸乳液特点
1、水性丙烯酸乳液是常用的热固性树脂，在热固性树脂中的用量比较大，而且应用比较广泛。水性丙烯酸乳还具有多的改性剂、促进剂、添加剂等，可以组成多种组合，从而得到性能不同的环氧固化体系，能够满足各种性能和工艺的要求
2、水性丙烯酸乳液的稳定性受温度的影响比较大，在低温时乳液的稳定性比较好，即便存在分层也可以利用搅拌的方法快速复原。
3、水性丙烯酸乳液在聚合过程以水做溶剂，避免了采用昂贵的有机溶剂和回收溶剂的麻烦，也减少了引起火灾和污染的危险。它以价廉，无公害，安全方便，节约能源等优点使乳液聚合得到越来越广泛的应用。
专栏：技术交流
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FTL stack trace ("~" means nesting-related):
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