摘要
以聚醚、甲苯二异氰酸酯(TDI)、一缩二乙二醇、蓖麻油为主要原料,二羟甲基丙酸(DMPA)为亲水扩链剂,三乙胺为中和剂制备了稳定的阴离子水性聚氨酯乳液(WPU),研究了NCO/OH摩尔比、DMPA及蓖麻油的加入量对WPU的耐水性、稳定性和力学性能的影响,结果表明:改性后的乳液具有较好的稳定性,适量的蓖麻油可提高胶膜的拉伸强度及耐水性。当聚醚与蓖麻油质量比为7︰3、DMPA为5%、NCO与OH摩尔比为1.3时,WPU综合性能最好。
Stable waterborne polyurethane （WPU） was synthesized from toluene diisocyanate （TDI）,a polyether polyol and dihydroxymethylpropionic acid （DMPA） using castor oil as the crosslinking agent. Effects of NCO/OH,DMPA and castor oil on the water-resistance,stability and mechanical properties were investigated. Results showed that the castor oil modified WPU has better stability,and suitable amount of castor oil can improve the tensile strength and water-resistant properties of the film from WPU. The obtained WPU has excellent balanced properties when prepared with 7：3 mass ratio of polyether to castor oil,5% mass percent of DMPA,and 1.3 molar ratio of NCO to OH.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2010年第2期285-288,共4页
Chemical Industry and Engineering Progress
基金
引进先进林业科学技术创新项目(2006-4-C03)
关键词
蓖麻油
水性聚氨酯
交联改性
castor oil waterborne polyurethane modified crosslinking
