【摘要】 以异佛尔酮二异氰酸酯(IPD I)、聚酯二元醇、二羟甲基丙酸(DMPA)和丙三醇为主要原料合成了脂肪族水性聚氨酯分散体,并用环氧树脂对其进行了改性。研究了环氧树脂的环氧值及用量、扩链剂种类及用量、n(NCO)/n(OH)等因素对其性能的影响。实验结果表明,当环氧树脂的环氧值为0.43,用量为6%~8%(占总单体质量分数),以乙二胺为扩链剂,质量分数为1%,n(NCO)∶n(OH)为(1.5~1.8)∶1时,可得到耐水性、稳定性、力学性能优良的水性环氧聚氨酯分散液。更多还原

【Abstract】 A waterborne aliphatic polyurethane(WPU) dispersion was synthesized by the reaction of epoxy resin with polyester-diol,glycerol,dimethoxypropionic acid(DMPA) and isophorone diisocyanate(IPDI).The effect of the epoxy value and the amount of epoxy resin,the kind and the amount of the chain-extender and(n(NCO)/)n(OH) on the properties of the WPU were investigated.The results showed that when the amount of(E-44) was 6%~8%,the amount of EDA was 1%,n(NCO)∶n(OH)=(1.5～1.8)∶1,the WPU with good(water-)resistance,stability and mechanical properties could be prepared.更多还原