亲水性封闭型芳香族异氰酸酯交联剂的合成及性能研究  

Synthesis and Performance Research of Waterborne Blocked Aromatic Isocyanate Crosslinking Agent

作　　者：邱峻[1] 韦军[1] 王宝总[2] 郑小娟[2] 

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

出　　处：《聚氨酯工业》2011年第6期39-42,共4页Polyurethane Industry

基　　金：江苏省高校自然科学研究重大项目(11KJA430010);江苏省自然科学基金(BK2009170);盐城工学院自然研究基金面上项目(XKY2011001);引进人员科研立项项目(XKR2010087)

摘　　要：以4,4'-二苯基甲烷二异氰酸酯(MDI)和三羟甲基丙烷(TMP)为原料,在催化剂作用下反应制得NCO封端的预聚物,再以22,-二羟甲基丙酸(DMPA)和聚醚二元醇(PEG)对预聚物进行扩链,最后以35,-二甲基吡唑(DMP)来封闭活性的NCO基团得到亲水性封闭型芳香族异氰酸酯交联剂,并用红外光谱表征了交联剂的结构。讨论了加料工艺对聚合反应影响,以及nDMPA/nPEG对交联剂性能的影响。研究表明,将TMP连续缓慢加入MDI体系有利于聚合反应的控制,当DMPA与PEG的摩尔比在2∶1时,交联剂的综合性能较好。The NCO-terminated prepolymer was prepared by the reaction of 4,4＇-dlphenyl-methane-dusocya- hate （MDI） and trjmethylolpropane （TMP）, which was further reacted with 2,2-dimethylolpropionic acid （DM- PA） and polyether glycol （PEG） to obtain chain-extending intermediate. The active NCO groups of the intermedi- ate were blocked by 3,5-dimethylpyrazole （DMP） to achieve hydrophilic blocked aromatic isocyanate crosslinking agent. FT-IR spectra confirmed the active NCO groups were successfully blocked. The effect of feeding process on the control of polymerization and the molar ration of DMPA ＇and PEG on the properties of crosslinking agent were discussed, respectively. The results indicated that dropping TMP continuously and slowly into MDI system favored the control of polymerization, and the crosslinking agent had better comprehensive properties while the molar ration of DMPA and PEG was kept at 2： 1.

关 键 词：异氰酸酯 交联剂 亲水性 

分 类 号：TQ630.1[化学工程—精细化工]