摘要
采用异佛尔酮二异氰酸酯(IPDI)、聚乙二醇600(PEG600)、2,2-二羟甲基丙酸(DMPA)为主要原料合成水性聚氨酯分散体,然后分别通过甲基丙烯酸-2-羟乙酯(HEMA)、二甲基丙烯酸甘油酯(GMDA)和季戊四醇三丙烯酸酯(PETA)引入碳碳双键,制备了2,4,6官能度的3种聚氨酯丙烯酸酯(PUA)水性UV树脂(UV-WPUA)。利用二正丁胺法测定合成过程中异氰酸根(-NCO)含量的变化,通过红外光谱(FT-IR)表征了合成产物的结构,树脂的紫外光固化结果表明4官能度的树脂具有最高的转化率(80%);随着官能度的提高,吸水率降低而光泽度逐步提高,其中4官能度的树脂力学性能更为优良。
A series of waterborne UV curable resins of polyurethane-acrylate were synthesized with isophorone diisocyanate(IPDI),poly ethylene glycol(PEG600),1,4-butanediol(1,4-BA),2,2-dimethylol propionic acid(DMPA)as main material.Then,UV curable waterborne polyurethane-acylates(UV-WPUAs)with different C=C double bond functionality,were prepared with 2-hydroxyethyl methacrylate(HEMA),glycerol dimethacrylate(GMDA)or pentaerythritol triacrylate(PETA).The change of isocyanate(-NCO)content during synthesis progress was monitored by di-n-butylamine titration method.The structure of the synthesized products was characterized by FT-IR.The UV-curing results show that the resin with four functionalities has the highest conversion,(80%),the water absorption is lower and the glossiness gradually increases with improvement of the functionality,and the mechanical performance is more superior for the resin with four functionalities.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2015年第1期13-18,共6页
Polymer Materials Science & Engineering
基金
东莞市高等学校科研院所科学计划项目(重点)(2011108101013)
关键词
紫外光固化
水性UV树脂
聚氨酯丙烯酸酯
多官能度
UV-curable coatings
waterborne UV resin
polyurethane-acrylate
multifunctionality
