摘要
合成了稳定的聚醚型阴离子聚氨酯乳液。研究了w（二羟甲基丙酸）、n（异氰酸根）与n（羟基）之比、中和剂的种类对乳液和胶膜性能的影响。实验结果表明：乳液的黏度、稳定性随着w（二羟甲基丙酸）的增大而增大，当w（二羟甲基丙酸）为7．5％时乳液和胶膜性能最好；涂膜的拉伸强度随n（异氰酸根）与n（羟基）之比增大而增大，断裂伸长率随n（异氰酸根）与n（羟基）之比增大而减小，适宜的n（异氰酸根）与n（羟基）之比应在7．5～8．0之间；用三乙胺做中和剂得到的乳液外观和稳定性好于氢氧化钠和氨水。
Stable waterbased polyurethane emulsion （WPU） was synthesized with toluene diisocyanate, polyether 210, dimethylol propionic acid and triethylamine. Influence of w （dimethylol propionie acid） , n（-NCO）/n（-OH） and neutralized reagent on properties of the emulsion and the resulted film was investigated. The results showed that stability and viscosity of WPU increased with the increase w （ dimethylol propionie acid） ; when w （dimethylol propionie acid） was 7.5 % , the performance of PUA and the resulted film was perfect; the breaking elongation of the film decreased and stretch intensity increased with the increase of n （ - NCO）/n （ - OH）, and the optimal value was 7.5 - 8.0 ; the emulsion with the excellent performance and stability was prepared with triethylamine as neutralized reagent.
出处
《电镀与精饰》
CAS
北大核心
2009年第5期26-29,共4页
Plating & Finishing
关键词
水性聚氨脂
涂料
乳液
waterbased polyurethane
coating
emulsion
