摘要
研究了受阻胺类光稳定剂GW-540[亚磷酸三(1,2,2,6,6-五甲基哌啶醇)酯]的合成工艺。合成分两步进行,第一步为2,2,6,6-四甲基哌啶(哌啶醇)与甲醛反应,再经蒸馏得到1,2,2,6,6-五甲基哌啶醇(中间体);第二步中间体与滴加的PCl3在苯中反应生成GW-540。反应的最佳条件如下,第一步:反应原料摩尔比:n哌啶醇∶n甲醛为1∶2.15,反应温度68～72℃,反应时间7h,中间体收率约96%。第二步:反应原料摩尔比nPCl3∶n中间体为1∶6.1～6.2,反应温度55～60℃,反应时间5h。GW-540收率98%,熔点118～124℃。
The synthesis technology of hindered amine light stabilizer GW-540 [（tris-（1,2,2,6,6）-penta- methyl-pyridine alcohol） phosphite] was researched. The synthesis divides two steps. In first step, 2,2,6,6-tetra-methyl-pyridine alcohol reacts with formalin, them through distillation to get 1,2,2,6,6-pental-methyl- pyridine alcohol （intermediate）. In second step, the intermediate reacts with PC13 added dropwise in benzene to product GW-540, The optimaied reaction conditions in first step are： mole ratio of raw materials nryridine aloohol：nHCHO is 1：2.15, reaction temperature is 68-72℃, reaction time is 7 h, yield is about 96%, and in second step： Lhe mole ratio of raw materials nintermediate：nPCl3 is 1：6.1-6.2, reaction temperature is 55-60℃, reaction time is 5 h. The yield of GW-540 is 98%, with melting point of 118-124℃.
出处
《塑料助剂》
2008年第1期26-29,共4页
Plastics Additives
关键词
受阻胺
光稳定剂
亚磷酸三(1
2
2
6
6-五甲基哌啶醇)酯合成工艺
hindered amine
light stabilizer
[tris-（1,2,2,6,6）-penta-methyl-pyridine alcohol] phosphite
2,2,6,6-tetra-methyl-pyridine alcohol
synthesis technology
