摘要
以异佛尔酮二异氰酸酯(IPDI)、季戊四醇三丙烯酸酯(PETA)和丙三醇为原料分步反应合成了可光固化九官能团聚氨酯丙烯酸酯(PUA)预聚物。讨论了温度、时间、催化剂用量对合成PUA预聚物的影响,用红外光谱(FT-IR)对预聚物结构进行了表征,并测试了PUA预聚物紫外光固化膜的附着力、光泽度、硬度等物理性能。结果表明,分步反应合成PUA预聚物时,第一步反应温度为65℃,反应时间为2.5 h,且催化剂用量为0.02%;第二步反应温度为75℃,反应时间为2.5 h;经紫外光固化所得的PUA固化膜附着力为0级、光泽度为97,硬度为5H,均比市售同类产品高。
UV-curable nine functional polyurethane acrylate （PUA） prepolymer was synthesized with isophorone diisocyanate（ IPDI）, pentaerythritol tri-acrylate （PETA） and glycerol. Effects of temperature, time and catalyst on the synthesis of PUA prepolymer were discussed. Its structure was characterized by FI-IR. The UV-curable film properties were tested such as adhesion, glossiness, hardness, etc. The experimental results showed that the PUA prepolymer was synthesized stepwise, the first step was the reaction temperature 65℃, reaction time 2. 5 hours, and the amount of catalyst 0. 02%, the second step was reaction temperature 75℃, reaction time 2. 5 hours. The film adhesion was 0, the glossiness was 97, the hardness was 5H, the properties were higher than commercial products.
出处
《聚氨酯工业》
2013年第3期25-28,共4页
Polyurethane Industry
