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本文以马来酸酐、三羟甲基丙烷为原料合成出一种新型的亲水二元醇,将其与聚碳酸酯二元醇、甲苯-2,4-二异氰酸酯(TDI),和丙烯酸-2-羟乙基酯(2-HEA)等合成出新型水性紫外光固化聚氨酯丙烯酸酯,并通过傅立叶红外光谱(FT-IR)对其进行了详细表征。并对平均粒径及其分布、固化膜性能进行了测试。结果表明:合成的亲水二元醇能与异氰酸酯反应,将更多的双键引入产物主链并参与交联,解决了以单端羟基丙烯酸类单体在交联固化过程中双键量有限的难题;当体系中带双键的亲水二元醇含量增加时,乳液粒径显著减小;将聚碳酸酯二醇引入主链中,所得到的固化膜具有良好的耐水解性和耐溶剂性。
In this paper, a new type of hydrophilic diol was synthesized from maleic anhydride and trimethylol propane, which was mixed with polycarbonate diol, toluene-2,4-diisocyanate (TDI), and acrylic- 2-hydroxyethyl methacrylate (2-HEA) were used to synthesize a new water-borne UV-curable urethane acrylate, which was characterized by Fourier transform infrared spectroscopy (FT-IR). The average particle size and its distribution, cured film properties were tested. The results show that the synthesized hydrophilic diol can react with isocyanates, introduce more double bonds into the main chain of the product and participate in the cross-linking, which solves the problem that the double bonds of the single-ended hydroxyl acrylic monomers in the cross-linking and curing process are limited ; When the content of the hydrophilic diol with double bond increases in the system, the particle size of the emulsion is significantly reduced; the polycarbonate diol is introduced into the main chain and the resulting cured film has good hydrolysis resistance and resistance Solvent.