Synthesis and Thermal Stability of Antimony Tris (Thioethyl Stearate) for PVC

来源期刊：中南大学学报(英文版)2000年第3期

论文作者：LIU You-nian WANG Chun-jiang SHU Wan-gen ZENG Dong-ming Chen Qi-yuan

文章页码：146 - 148

Key words：thermal stabilizer; antimony thiolate; synthesis; thermal stability

Abstract: A novel type of thermal stabilizer-antimony tris (thioethyl stearate)(ATS) was synthsized. Its thermal stability was measured by heat-aging oven test when incorporated into PVC. ATS was synthesized from stearic acid, antimony trioxide and 2mercaptoethanol in two steps. The reaction conditions of synthesis were optimized through orthogonal test. Experimental results show that the molar ratio of stearic acid and antimonytris (2-hydroxyethylthiolate) was 1.2, adding 0.6% tetra-n-butyl titanate as catalyst and xylene as azeotropic solvent, heating and refluxing for about 4 h, and the yield of ATS is 83.9%. The thermal stability time is about 40 min(at 200℃) when added 2phr(per hundred resin) in PVC. The thermal stability of ATS is better than that of Ca-Zn complex and basic lead stabilizers, and equal to that of dibutyltin dilaurate.