水合肼对水性聚氨酯自消光树脂性能的影响

Influence of hydrazine hydrate on waterborne polyurethane self-matting resin

以聚四氢呋喃二元醇（PTMG）、异佛尔酮二异氰酸酯（IPDI）、2，2-二羟甲基丙酸（DMPA）、1，4-丁二醇（BDO）、三乙胺（TEA）、水、水合肼等为基本原料，制备出一系列水性聚氨酯自消光树脂乳液。利用红外光谱、激光粒度仪和扫描电镜等测试方法对乳液的结构和性能进行了分析表征，并研究了水合肼加入量对乳液性能的影响。结果表明：WPU膜表面微观结构符合消光机理。当n（-NC0）／n（-OH）=1．25、wDMPA=2．0％、wBDO=0．5％、w水合肼=40％时制备的聚氨酯膜消光性能最优。

A series of waterborne polyurethane （WPU） self-matting resin emulsion were prepared with polytetramethylene glycol （PTMG）, isophorone diisocyanate （IPDI）, 2,2- dimethylol propionic acid （DMPA）, 1,4- butanediol （BDO）, three triethylamine （TEA）, water and hydrazine hydrate as main raw materials. The structure and properties of emulsion were characterized by infrared spectroscopy, laser particle size analyzer and scanning electron microscopy methods, and the effects of different amount of hydrazine hydrate on the properties of emulsion were studied. The results show that WPU film surface microstructure fits with the extinction mechanism. When n （-NCO）/n （- OH） = 1.25 ,wDMPA = 2. 0% ,wBDO =0. 5% ,W hyarazine hydrate = 40%, the WPU film has a good matting performance.