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有机硅改性水性UV聚氨酯的合成与性能
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Abstract:
以甲苯二异氰酸酯(TDI)、聚乙二醇1000(PEG1000)、双羟甲基丙酸(DMPA)、甲基丙烯酸羟乙酯(HEMA)等为原料，制备出UV固化的水性聚氨酯涂料(UV-WPU)，同时用3-氨丙基三乙氧基硅烷进行改性；研究了DMPA用量、有机硅用量、中和度等对乳液黏度和涂膜吸水率的影响；采用红外光谱对聚氨酯结构进行了表征。结果表明，红外光谱分析证实产物具有预期结果；随着羧酸根(–COOH)含量增加，乳液黏度增加，涂膜吸水率提高；有机硅改性提高了水性聚氨酯(WPU)体系交联密度，使得乳液黏度增加，涂膜吸水率下降，耐水性能提高。
UV curable waterborne polyurethane (WPU) coatings were prepared by serial steps method using toluene diisocyanate (TDI), polyethylene glycol (PEG, MW = 1000), α, α-dimethylol propionic acid (DMPA), 2-hydroxyethyl methacrylate (HEMA) as raw material, and UV-WPU
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