【摘要】 以蓖麻油与聚醚(N210,Mn=1000)、甲苯二异氰酸酯(TDI)为主要原料,以二乙烯三胺、环氧氯丙烷、马来酸酐等为亲水单体,通过丙酮法制得了稳定的水性聚氨酯乳液。探讨了聚合反应的机理,研究了亲水单体含量对聚氨酯乳液的粘度、稳定性、乳液成膜的干燥时间以及胶膜的耐水性的影响。结果表明,当亲水单体环氧氯丙烷和马来酸酐含量为18.0%时,可以制得稳定的含蓖麻油的水性聚氨酯乳液,并且胶膜具有良好的耐水性。更多还原

【Abstract】 Stable waterborne polyurethane emulsions(CWPU) were synthesized with castor oil, polyether glycol(N210,Mn=1000) and toluene diisocyanate(TDI) as primary materials and diethylene triamine, epoxy chloropropane, maleic anhydride(MAH) as hydrophilic monomer by acetone process.Mechanism of polymerization and effects of epoxy chloropropane and MAH on viscosity,stability,dryingtime and waterresistance of polyurethane emulsions or films were discussed.Results show that stable CWPU can be prepared by using hydrophilic monomers including epoxy chloropropane and MAH at 18.0% content,to form films of good water resistance.更多还原