摘要
以三氯氧磷、乙醇及乙二醇为主要原料,二氯乙烷为溶剂,辛酸亚锡为催化剂,三聚氰胺为缚酸剂,制备了含端羟基的聚合磷酸酯阻燃剂。讨论了反应的主要因素,确定适宜的反应条件为:n(三氯氧磷)∶n(乙醇)∶n(乙二醇)为1∶1∶1.05,0℃滴加入乙醇,反应依次在25℃、45℃、65℃分别保温反应2h、2h和1h。产率89.2%,数均相对分子质量MnGPC=3750,分布指数PD=1.27。用FT IR,1 H NMR表征了产物结构。在聚氨酯硬泡沫中进行了应用实验,极限氧指数达到29,且表现出良好的低温尺寸稳定性。
A kind of hydroxy phosphate ester polymer flame retarder was synthesised by a modified preparation method using phosphorus oxychloride,ethanol and ethylene glycol as precursors,dichloroethane as solvent,stannous octoate as catalyst,melamine as the binding acid agent.Effects of the reaction conditions were investigated and the optimum parameters were as follows： the molar ratio of phosphorus oxychloride,ethanol and ethylene glycol was 1∶1∶1.05,and the reaction time was 2 h,2 h and1 h at 25℃,45℃ and 65℃ accordingly after droping in ethanol at 0℃.The final product yield was 89.2%,and the MGPCn=3750 and PD=1.27.FT IR and 1H NMR were used to characterize the structure of the final product.The application of the product in rigid PU foam showed that its LOI=29,and it exbilited excellent low temperature dimensional stability.
出处
《化学世界》
CAS
CSCD
北大核心
2013年第1期14-17,共4页
Chemical World
关键词
聚合磷酸酯
反应型阻燃剂
阻燃聚氨酯
合成
phosphate ester polymer
reactive flame retardant
flame retardant polyurethane
synthesis
