Synthesis and application of antimony pent(isooctyl thioglycollate)^①

来源期刊：中南大学学报(英文版)2005年第1期

论文作者：刘又年 李红兵 舒万艮 陈启元

文章页码：64 - 67

Key words：colloidal antimony peroxide; antimony pent(isooctyl thioglycollate); synthesis; PVC thermal stabilizer

Abstract: A new type of thermal stabilizer, antimony pent(isooctyl thioglycollate)(Sb(SCH₂COOC₈H₁₇)₅), was synthesized by using antimony trioxide, isooctanol and thioglycolic acid in 2 steps. Firstly, antimony trioxide was oxidized into colloidal antimony peroxide. Then antimony peroxide and isooctyl thioglycollate reacted stoichiomet rically for 2 h with the yield of 87%. This compound was used as thermal stabilizer for polyvinyl chloride(PVC). The results show that the thermal stability time is 52 min at 200℃by heat-ageing oven test when adding 2.5% thermal stabilizer to PVC resin. Compared with antimony tris(isooctyl thiolycollate), the initial thermal stability of antimony pent(isooctyl thioglycollate) is better than that of antimony tris(isooctyl thioglycollate), while the longterm thermal stability time is shorter than that of antimony tris(isooctyl thioglycollate). Meanwhile, the synergism of antimony pent(isooctyl thioglycollate) with calcium stearate was studied, indicating that when the mass ratio of antimony pent(isooctyl thioglycollate) to calcium stearate is 2∶1, the thermal stability time of PVC is 58 min.