摘要
以自制聚酯多元醇和过量的2，4-甲苯二异氰酸酯为原料进行预聚反应，合成含异氰酸酯端基的预聚体，再以二羟甲基丙酸为亲水剂，引入二元醇进行扩链反应，制备了水性聚氨酯。研究了残留-NCO含量及n-Nco／n—OH比值对乳液合成及性能的影响。研究认为：控制n-NCO／n—OH比值在2．0—2．5之间，残留一NCO含量在3．0％-3．5％之间时，制备的乳液性能最佳。
A NCO-terminated polyurethane prepolymer was prepared by self-made polyester polyol and excessive toluene diisocyanate （ TDI ）, and then using dimethanol propionic acid （ DMPA ） as hydrophilic agent, waterborne polyurethane were synthesized by cross-linking reaction. The effects of residual -NCO content and n_Nco/n_oH ratio on the synthesis and properties of the emulsion were studied. The results showed that when n-NCO/n-OH ratio was between 2.0 and 2.5, and residual -NCO content was between 3.0%-3.5%, the properties of the emulsion were perfect.
出处
《上海涂料》
CAS
2011年第10期15-18,共4页
Shanghai Coatings
基金
陕西国防工业职业技术学院科研基金资助项目(GF-0902)
关键词
阴离子型水性聚氨酯
合成
乳化
anionic waterborne polyurethane
synthesis
emulsification
