| Synthesis of antimony tris(mercaptoethyl carboxylates) as thermal stabilizer for polyvinyl chloride |
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| 引用本文： | 舒万艮,刘又年,陈启元. Synthesis of antimony tris(mercaptoethyl carboxylates) as thermal stabilizer for polyvinyl chloride[J]. 中国有色金属学会会刊, 2002, 12(5) |
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| 作者姓名： | 舒万艮 刘又年 陈启元 |
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| 作者单位： | College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China |
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| 摘 要： | A novel type of thermal stabilizers-antimony tris(mercaptoethyl carboxylates) (Sb(SCH2CH2OOCR) 3), was synthesized from carboxylic acid, antimony trioxide and 2-mercaptoethanol in two steps. The experimental results show that the molar ratio of carboxylic acid to antimony tris(2-hydroxyethyl mercaptide) is 1.2, when adding 0.6% tetra-n-butyl titanate as catalyst and xylene as isotropic solvent, heating and refluxing for about 2～4h. The thermal stability was measured by heat-aging oven test. The thermal stability time is about 8～40min(at 200℃) when adding 2% tetra-n-butyl titanate in polyvinyl chloride(PVC). Among these stabilizers, antimony tris(mercaptoethyl stearate) has best thermal stability. Its thermal stability is better than that of Ca-Zn complex and basic lead stabilizers, and equal to that of organotin. In addition, the stabilization mechanism of this kind of stabilizers for PVC was discussed briefly.
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Synthesis of antimony tris(mercaptoethyl carboxylates) as thermal stabilizer for polyvinyl chloride |
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| Abstract: | |
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| Keywords: | PVC thermal stabilizer antimony mercaptan synthesis thermal stability |
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