咪唑系水性封闭型聚异氰酸酯交联剂的制备与性能  

Preparation and Properties of Imidazole-Type Waterborne Blocked Polyisocyanate Crosslinkers

作　　者：韦军[1] 蒋乙峰[2] 

机构地区：[1]盐城工学院材料工程学院,江苏盐城224051 [2]常州大学材料科学与工程学院,江苏常州213164

出　　处：《高分子材料科学与工程》2016年第2期160-163,共4页Polymer Materials Science & Engineering

基　　金：江苏省高校自然科学研究重大项目(11KJA430010);江苏省"青蓝工程"(学科带头人);江苏省生态环境重点实验室开放项目(EML201205);盐城工学院大学科技园产学研联合创新基金(YKA201213)

摘　　要：以异佛尔酮二异氰酸酯(IPDI)和2,2-二羟甲基丙酸(DMPA)制备亲水性的异氰酸酯(NCO)封端的线型预聚体,再以预聚体与三羟甲基丙烷(TMP)反应合成支化结构中间体,最后以8种咪唑(IDZ)衍生物分别对残留的NCO基团进行封闭,制得一系列水性封闭型聚异氰酸酯交联剂。以傅里叶变换红外光谱表征了交联剂的结构,以热分析法着重研究了封闭剂的结构对交联剂解封温度的影响,结果表明交联剂的最低解封温度为100℃;稳定性研究表明交联剂在水性聚氨酯乳液中有较好的力学稳定性和适用稳定性。The hydrophilic NCO-terminated linear prepolymer was synthesized by the reaction of isophorone diisocyanate（ IPDI） and 2,2-bis（ hydroxymethyl） propionic acid,which further reacted with trimethylolpropane（ TMP） to obtain branched intermediate. The residual active NCO groups were blocked by eight kinds of imidazole derivatives,respectively,resulting in the achievement of a series of waterborne blocked polyisocyanate crosslinkers. FT-IR was used to characterize the structure of crosslinkers. The influence of the structure of blocking agents on deblocking temperature was emphatically studied. The results indicate that the lowest deblocking temperature is 100 ℃. Stability research shows that all crosslinkers have good mechanical and application stability in waterborne polyurethane.

关 键 词：聚异氰酸酯 咪唑 水性 封闭 交联剂 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]