A high‐efficiency zinc chelate stabilizer, Zn‐(2‐hydroxybenzylidene) aspartic acid (Zn‐HBAPA), has been synthesized. From dehydrochlorination and discoloration tests conducted at 180°C, Zn‐HBAPA has shown to be an excellent thermal stabilizer for flexible poly(vinyl chloride) (PVC) when compared with industrially used cadmium‐zinc soap stabilizer. Blending CaSt₂ derivatives and costabilizer THAM (tris[hydroxymethyl]aminomethane) with synthesized Zn‐HBAPA stabilizer in different ratios substantially improved the thermal stability of PVC while maintaining the initial color of the PVC. The thermal stability time and the induction time were 55.5 and 52 min, respectively. The initial color of PVC samples held for more than 70 min, and the time to turn the PVC samples completely black took 160 min. Results also showed that not only did the Zn‐HBAPA stabilizer show a good synergistic effect when combined with CaSt₂ and THAM, but it also exhibited good compatibility with PVC.

中文翻译：

---

Schiff碱锌配合物，用作柔性聚氯乙烯抗热降解的高效稳定剂

合成了高效的锌螯合稳定剂Zn-（2-羟基苄叉基）天门冬氨酸（Zn-HBAPA）。通过在180°C下进行的脱氯化氢和脱色测试，与工业上使用的镉锌皂稳定剂相比，Zn-HBAPA已显示出是出色的柔性聚氯乙烯（PVC）热稳定剂。搅拌CaSt ₂衍生物和共稳定剂THAM（三[羟甲基]氨基甲烷）与不同比例的Zn-HBAPA稳定剂合成后，在保持PVC初始色泽的同时，大大提高了PVC的热稳定性。热稳定时间和诱导时间分别为55.5和52分钟。PVC样品的初始颜色保持70分钟以上，将PVC样品完全变黑的时间为160分钟。结果还表明，Zn-HBAPA稳定剂与CaSt ₂和THAM结合时不仅显示出良好的协同作用，而且还与PVC表现出良好的相容性。