二胺固化剂对无溶剂封闭型聚氨酯树脂性能的影响  

Effects of Diamine Curing Agent on the Properties of Solvent-free Blocked Polyurethane Resin

作　　者：顾佳佳 蒋红梅 GU Jiajia;JIANG Hongmei(Shanghai Huafeng New Material Research and Development Technology Co.Ltd,Shanghai 201203,China)

机构地区：[1]上海华峰新材料研发科技有限公司,上海201203

出　　处：《聚氨酯工业》2020年第4期35-38,共4页Polyurethane Industry

摘　　要：以聚氧化丙烯多元醇(PPG-2000/PPG-3000)、甲苯二异氰酸酯(TDI-80)及丁酮肟(MEKO)为原料合成无溶剂封闭型聚氨酯树脂。以液体二元胺为固化剂,研究了3,3′-二甲基-4,4′-二氨基二环己基甲烷(DMDC)、4,4′-二氨基二环己基甲烷(PACM)和异佛尔酮二胺(IPDA)对固化物性能的影响。热失重分析(TGA)表明,封闭型聚氨酯/固化剂165℃以下可实现解封与固化反应。氨基与NCO基摩尔比为1∶1时,封闭型聚氨酯树脂/DMDC固化物的模量及强度最高,封闭型聚氨酯树脂/IPDA固化物的模量最低。In this work,three types of diamines,namely 4,4′-methylenebis(2-methylcyclohexylamine)(DMDC),4,4′-diaminodicyclohexyl methane(PACM)and isophorondiamine(IPDA)were utilized as liquid curing agents for researching properties of the solidified substance of solvent-free blocked polyurethane prepolymer resin(PU resin)which was prepared with polyoxypropylene polyols(PPG-2000 and PPG-3000),2,4-tolylene diisocyanate(TDI-80)and 2-butanone oxime(MEKO).Thermogravimetric analysis(TGA)showed that the deblocking and curing reaction temperature were below 165℃.When the molar ratio of NH 2/NCO was 1∶1,the modulus and tensile strength of solidified substance of PU resin and DMDC were the highest,while the modulus of IPDA-solidified PU was the lowest.

关 键 词：无溶剂 封闭型聚氨酯 二元胺 固化剂 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]