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    • 10. 发明授权
    • Process for the production of cyanate ester resins having unique
composition
    • 用于生产具有独特组成的氰酸酯树脂的方法
    • US5756592A
    • 1998-05-26
    • US751083
    • 1996-11-15
    • William B. BedwellRaymond J. SwedoBruce T. DeBonaGeorge D. Green
    • William B. BedwellRaymond J. SwedoBruce T. DeBonaGeorge D. Green
    • B01J19/24C08G8/28C08G73/06C08G85/00C08G65/48
    • B01J19/2415C08G8/28B01J2219/00058B01J2219/00099B01J2219/00166B01J2219/00186
    • A continuous process for the production of a phenolic-based cyanate ester resin is provided and includes the steps of: feeding a phenolic organic compound, a trialkylamine and a cyanogen halide into a continuous, plug-flow type reactor; causing the reactants to flow through and react in the reactor over a period of time defined as a residence time; continuously reacting the phenolic organic compound, the triallckylamine and the cyanogen halide in the reactor; and maintaining a temperature in the reactor of between about -75.degree. C. to about 0.degree. C. The reactor has a length which is equal to or greater than ten times its internal diameter. The mol equivalent concentration of the cyanogen halide is greater than the mol equivalent concentration of the trialkylamine, and the mol equivalent of the trialkylamine is greater than the mol equivalent of the phenolic organic compound. The reactants are resident for a long enough time in the reactor to achieve at least substantial conversion of the phenol groups to cyanate ester groups, but for short enough a time to substantially suppress undesirable side reactions. The phenolic-based cyanate ester resins prepared by the continuous process may contain as much as 95 percent by weight or more cyanate ester groups.
    • 提供了一种生产酚基氰酸酯树脂的连续方法,包括以下步骤:将酚类有机化合物,三烷基胺和氰卤化物进料到连续的流动型反应器中; 使反应物在定义为停留时间的时间内流过并在反应器中反应; 在反应器中使酚类有机化合物,三环戊胺和氰卤化物连续反应; 并将反应器中的温度保持在约-75℃至约0℃之间。反应器的长度等于或大于其内径的十倍。 氰卤化物的摩尔当量浓度大于三烷基胺的摩尔当量浓度,三烷基胺的摩尔当量大于酚类有机化合物的摩尔当量。 反应物在反应器中驻留足够长的时间以实现酚基团至少基本上转化为氰酸酯基团,但足够短的时间以基本上抑制不期望的副反应。 通过连续方法制备的酚基氰酸酯树脂可以含有多达95重量%或更多个氰酸酯基团。