含异氰酸酯基丙基三乙氧基硅烷的合成

Synthesis of 3-isocyanato propyltriehthoxysilane

研究了氯丙基三乙氧基硅烷与氰酸钾反应制备异氰酸酯基丙基三乙氧硅烷的方法,考察了反应温度,反应物的配比优化,溶剂种类以及保护试剂的种类对合成产率的影响,确立了最佳的合成条件:反应物氯丙基三乙氧基硅烷与氰酸钾的摩尔比为1:1.15,DMF为溶剂,己内酰胺为保护试剂,反应温度为125℃,收率可达92%,并采用波谱分析确证了目标物质的结构。

Chloropropyltriethoxylsilane reacted with potassium cyanate to form 3 -isocyanato propyltriehthoxysilane. The effect of reacting temperature, reagent flow and different blocked agent and solvent toward the yield of 3-isocyanato propyltriehthoxysilane were studied. The experiment reveals that the reaction can be easily performed in n-methylformamide at the temperature of 125℃, with n（Chloropropyltriethoxylsilane）：n（potassium eyanate）=1：1.15 and ε-eaprolactam as blocked agent, to give the yield of 92% for 3-isocyanato propyltriehthoxysilane. The structure was identified by Spectrum（H,IR） analysis.