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以异佛尔酮二异氰酸酯(IPDI)、聚醚二元醇(N210)、甲基丙烯酸甲酯(MMA)等为原料,采用种子乳液聚合法制备了水性丙烯酸酯聚氨酯(PUA)乳液。探讨了异氰酸根指数R,二羟甲基丙酸(DMPA)、三羟甲基丙烷(TMP)和甲基丙烯酸甲酯(MMA)等用量以及中和度对PUA乳液及其漆膜性能的影响,获得了PUA乳液的最佳合成条件:R=1.3,DMPA添加量为PU质量的6%,TMP和MMA的添加量分别为PUA质量的1%和30%,中和度为90%~100%。红外光谱分析表明,成功合成了PUA乳液。在优化条件下制备的乳液外观呈蓝色半透明状,平均粒径71.89 nm,黏度为66.13 mPa·s,具有较好的稳定性。以该乳液制备的漆膜附着力1级,硬度H,吸水率13.84%,具有较好的耐醇性。
Waterborne acrylate polyurethane (PUA) emulsions were prepared by seed emulsion polymerization using isophorone diisocyanate (IPDI), polyether diol (N210) and methyl methacrylate (MMA) as raw materials. The effects of the amount of isocyanate groups R, dimethylolpropionic acid (DMPA), trimethylolpropane (TMP) and methyl methacrylate (MMA) on the properties of PUA emulsion and its film , The optimum conditions of PUA emulsion were obtained: R = 1.3, DMPA 6%, PUMP MMA 1% and PUA 30% respectively, the degree of neutralization was 90% 100%. Infrared spectroscopy showed that the PUA emulsion was successfully synthesized. The emulsions prepared under optimized conditions showed a blue translucence appearance with an average particle diameter of 71.89 nm and a viscosity of 66.13 mPa · s, which showed good stability. The paint film prepared by the emulsion adhesion level 1, hardness H, water absorption 13.84%, has better alcohol resistance.