固体钙锌复合稳定剂的合成及在PVC中应用

Synthesis and Application of Solid Ca-Zn Composite Thermal Stabilizer for PVC

利用环氧脂肪酸钙锌与-些辅助成分复配,将该复配体系用于聚氯乙烯(PVC)中通过老化试验进行热稳定性能的测试,并研究了钙锌稳定剂加料顺序及配比与稳定性能的关系和钙锌稳定剂与β-二酮的协同效应,筛选出稳定剂与β-二酮的最佳配方,探讨了复合稳定剂在PVC中的应用性能。结果表明。先加钙后加锌且钙锌比为3:1的稳定剂的稳定效果较佳,β-二酮能有效抑制PVC的初期着色,且用量宜为2%～4%,稳定剂在PVC中的用量为4份时效果较好。

Application of epoxy satearic acid calcium-zinc and some auxiliary components composites in PVC was investigated. The thermal aging property was studied by using the heat aging methods. The relationship between the feeding order of calcium-zinc stabilizer and calcium-zinc ratio with the thermal aging property and the synergistic effect between calcium- zinc stabilizer and β-diketone in the PVC were also studied. By tests, the optimum stabilizer formulation comprising calcium-zinc stabilizer and β-diketone was obtained. The effect of the composite stabilizer on PVC heat stability was studied. The results show that the stabilizing effect of stabilizer, which the mass ratio of calcium/zinc soaps is 3 ： 1 and the feeding order is calcium first then zinc, is the best. The β-diketone can restrain effectively the initial coloring of PVC, the optimum dosage is 2%-4%. The effect is the best when the stabilizer dosage in PVC is 4 phr.