UV固化三官能脂肪族聚氨酯丙烯酸酯的合成

Synthesis of UV-curable aliphatic polyurethane tri-acrylate

以HDI、三官能团聚酯（PE）、丙烯酸羟乙酯等合成了可以紫外光固化（UV）的脂肪族聚氨酯丙烯酸酯低聚物。研究了反应温度、羟基官能度、加料顺序等对产物合成及性能的影响。结果表明，在合成中，温度控制在第1步是45～50℃，第2步在75℃为好，在第1步中加入丙烯酸羟乙酯便于控制平均分子质量。应用表明该聚合物具有韧性、附着力优、硬度好、耐候性好、耐磨等优点。

In this paper, UV-curable aliphatic polyurether oligomer acrylate from HDI, Tri-functionarity polyester（PE） and HEA was synthesized and the effect of the reaction temperature, the-OH functionarity and the charge order was also discussed. The best operational parameters were what the reaction temperature the step 1 was at 45 - 50 ℃, the step 2 was at 75 ℃ ; put in HEA at the first one part. It＇s application tests showed that it was perfecter oligomer with flexbity, weatherability, adhesion, hardness, abrasion resistance.