摘要
采用蓖麻油 (C .O .)、聚醚 (N 2 10 )、二异氰酸甲苯酯 (TDI)和二羟甲基丙酸 (DMPA)反应合成了聚氨酯脲水分散液 ,研究了C .O ./N 2 10的质量比、亲水单体含量、NCO/OH摩尔比和NH/NCO摩尔比对聚氨酯乳液及涂膜性能的影响 ,并应用傅立叶红外光谱仪 (FT-IR)测定反应产物的结构。研究发现C .O .可提高水性聚氨酯涂膜的物理机械性能和耐水性 ,当C .O ./N 2 10的质量比为 1∶1、NCO/OH摩尔比为 1.6∶1、DMPA添加量为 5 .5 %、NH2 /NCO摩尔比为 0 .5 0∶1时合成的水性聚氨酯涂料具有较好的成膜性、较高的硬度、优异的附着力和较好的耐水。
Waterborne polyurethane(WPU) was prepared by the reaction of castor oil(C.O.) with polyether glycol(N 210),dimethoxypropionic acid(DMPA) and toluene diisocyanate(TDI).The effects of mass ratio of castor oil,N 210,DMPA content,molar ratios of NCO to OH and NH_2/NCO on the properties were investigated.The structure of WPU was characterized by FT-IR.It was found that mechanical properties and water resistance of WPU coating film were increased with addition of castor oil.At 1∶1-2 mass ratio of castor oil to N 210,1.6 molar ratio of NCO/OH,(5.5%) DMPA content and 0.50 molar ratio of NH_2/NCO, the castor oil waterborne polyurethane has excellent film-forming property,high hardness,good resistances to water and petrol,and excellent adhesion to base materials.
出处
《林产化学与工业》
EI
CAS
CSCD
2004年第3期78-82,共5页
Chemistry and Industry of Forest Products
关键词
水性聚氨酯
蓖麻油
waterborne polyurethane
castor oil
