摘要
合成了一种新型 PVC热稳定剂——三 (硬脂酸巯基乙酯 )锑 (简称 AMS)。并用热老化的方法测试了其对 PVC的热稳定性。以三氧化二锑、巯基乙醇及硬脂酸为原料分二步合成了三 (硬脂酸巯基乙酯 )锑 ,并通过正交实验进行了优化。实验结果表明 :反应物 C17H35COOH与 Sb(SCH2 CH2 OH) 3的摩尔比为 3.6 ,以钛酸丁酯作催化剂 ,二甲苯为带水剂 ,加热反应回流 4h,得到三 (硬脂酸巯基乙酯 )锑的产率为 83.9%。产品的热稳定性能测试表明 :当三 (硬脂酸巯基乙酯 )锑的添加量为 2份时 ,PVC树脂的热稳定时间为 40 min(2 0 0℃ )。该产品与硬脂酸钙复配后 ,其热稳定性优于钙一锌及铅盐复合热稳定剂 。
The synthesis of a novel type of thermal stabilizer - antimony tris(mercaptoethyl stearate) is presented. Its thermal stabilities have been measured by heat-ageing oven test when incorporated into PVC. Antimony tris(mercaptoethyl stearate) has been synthesized from stearic acid, antimony trioxide and 2-mercapto ethanol in two steps. The reaction conditions of synthesis have been optimized through orthogonal test. The experimental results show that antimony tris(mercaptoethyl stearate) is synthesized by reacting of stearic acid with antimony tris(2-hydroxyethylmercaptolate) at the mole ratio C17H35 COOH: Sb(SCH3CH2OH)3=3.6, adding 0.4% tetra-n-butyl titanate catalyst and 50% xylene solvent (mass percentage based on the mass of stearic acid), heating and refluxing for about 4 hours. The yield of antimony tris(mercaptoethyl stearate)is 83.9%. The thermal stability time is about 40min(at 200°C) when added 2phr(per hundred resin) in PVC. The thermal stability time of complex stabilizer of antimony tris(mercaptoethyl stearate) and calcium stearate is better than that of Ca-Zn complex and basic lead stabilizers and equal to that of dibutyltin dilaurate.
出处
《化学反应工程与工艺》
EI
CAS
CSCD
北大核心
2001年第3期249-252,共4页
Chemical Reaction Engineering and Technology
基金
国家"九五"科技攻关计划基金资助项目 (编号 96 - 119- 0 4- 0 3- 0 5 )
