申请人:Teijin Chemicals, Ltd.
公开号:EP1586576A1
公开(公告)日:2005-10-19
A process for producing a pentaerythritol diphosphonate represented by the formula (5) characterized by (A) reacting phosphorus trichloride with pentaerythritol in the presence of an inert solvent to obtain pentaerythritol dichlorophosphite (reaction (a)), (B) reacting the pentaerythritol dichlorophosphite with an aralkyl alcohol to obtain a pentaerythritol diphosphite (reaction (b)), and (C) heat-treating the pentaerythritol diphosphite in the presence of a halogenated compound on the condition of a temperature of from 80 to 300°C (reaction (c)):
wherein Ar1 and Ar2, which may be the same as or different from each other, each represents a substituted or unsubstituted aryl group having from 6 to 20 carbon atoms, and R3, R4, R5 and R 6 which may be the same as or different from each other, each represents a hydrogen atom, a substituted or unsubstituted aryl group having from 6 to 20 carbon atoms, or a saturated or unsaturated hydrocarbon group having from 1 to 20 carbon atoms.
According to the production process of the invention, a particular pentaerythritol diphosphonate capable of being utilized as a fire retarding agent and the like can be provided with high purity and high yield by an industrially advantageous process excellent in productivity.
生产五羟甲基四羟基二磷酸酯的方法,其以式(5)表示,其特征在于(A)在惰性溶剂存在下将三氯化磷与五羟甲基四羟基反应,得到五羟甲基二氯代磷酸酯(反应(a)),(B)将五羟甲基二氯代磷酸酯与芳基醇反应,得到五羟甲基二磷酸酯(反应(b)),以及(C)在存在卤化合物的条件下,将五羟甲基二磷酸酯在80至300°C的温度下进行热处理(反应(c)):其中Ar1和Ar2,可以相同也可以不同,每个代表具有6至20个碳原子的取代或未取代芳基,而R3、R4、R5和R6,可以相同也可以不同,每个代表氢原子,具有6至20个碳原子的取代或未取代芳基,或具有1至20个碳原子的饱和或不饱和碳氢基。根据本发明的生产方法,可以通过一种在生产效率方面优越的工业优势过程,提供一种特定的五羟甲基二磷酸酯,其可用作阻燃剂等,具有高纯度和高产率。