Abstract:
A method of preparing a poly(arylene ether)includes oxidatively polymerizing a monohydric phenol in solution, concentrating the solution by removing a portion of the solvent to form a concentrated solution having a cloud point, Tcloud, and combining the concentrated solution with an anti-solvent to precipitate the poly(arylene ether), wherein the concentrated solution has a temperature of at least about (Tcloud-10 DEG C) imme diately before it is combined with the anti-solvent. The method reduces the formation of undesirably fine particles in the product poly(arylene ether).
Abstract:
A method of removing substantially all solvent from a solution containing a polyphenylene ether polymer resin with little by-product formation (less than 250 ppm) is provided. The method employs a wiped thin film evaporator with a cylindrical heating chamber operating under conditions that satisfy the relationships defined by Equations I and II: 5.3*10 RL delta exp( )/m
Abstract translation:提供了从含有少量副产物形成的聚苯醚聚合物树脂(小于250ppm)的溶液中除去基本上所有溶剂的方法。 该方法采用具有圆柱形加热室的擦拭薄膜蒸发器,该条件在满足方程式I和II定义的关系条件下操作:5.3×10 24 RLΔexp(<-24123 / T)/ m
Abstract:
A method of removing substantially all solvent from a solution containing a polyphenylene ether polymer resin with little by-product formation (less than 250 ppm) is provided. The method employs a wiped thin film evaporator with a cylindrical heating chamber operating under conditions that satisfy the relationships defined by Equations I and II.Yields are maximized wherein values for feed rate (m) and percent solids (C) are selected to provide a maximum value for the output, Q, determined from the equation m*C=Q and the melt viscosity of the polyphenylene ether product is less than 50,000 centipoise at the operating temperature of the cylindrical heating chamber.
Abstract:
A method of preparing a poly(arylene ether) includes oxidatively polymerizing a monohydric phenol in solution, concentrating the solution by removing a portion of the solvent to form a concentrated solution having a cloud point, Tcloud, and combining the concentrated solution with an anti-solvent to precipitate the poly (arylene ether), wherein the concentrated solution has a temperature of at least about (Tcloud-10° C.) immediately before it is combined with the anti-solvent. The method reduces the formation of undesirably fine particles in the product poly(arylene ether).
Abstract:
A method of preparing a poly(arylene ether) includes oxidatively polymerizing a monohydric phenol in solution, concentrating the solution by removing a portion of the solvent to form a concentrated solution having a cloud point, Tcloud, and combining the concentrated solution with an anti-solvent to precipitate the poly (arylene ether), wherein the concentrated solution has a temperature of at least about (Tcloud-10° C.) immediately before it is combined with the anti-solvent. The method reduces the formation of undesirably fine particles in the product poly(arylene ether).
Abstract:
Un procedimiento para preparar un poli(éter de arileno), que comprende: el acoplamiento oxidativo de un fenol monohídrico usando un gas que contiene oxígeno en presencia de un disolvente y un catalizador de complejo metálico para producir una resina de poli(éter de arileno); la eliminación de una parte del disolvente para producir una solución concentrada que tenga un punto de turbidez, Tturbidez; y la combinación de la solución concentrada con un antidisolvente para precipitar el poli(éter de arileno), en la que la solución concentrada tiene una temperatura de al menos (Tturbidez -10ºC) aproximadamente, inmediatamente antes de combinarla con el antidisolvente.
Abstract:
A method of preparing a poly(arylene ether) includes oxidatively polymerizing a monohydric phenol in solution, concentrating the solution by removing a portion of the solvent to form a concentrated solution having a cloud point, Tcloud, and combining the concentrated solution with an anti-solvent to precipitate the poly (arylene ether), wherein the concentrated solution has a temperature of at least about (Tcloud-10° C.) immediately before it is combined with the anti-solvent. The method reduces the formation of undesirably fine particles in the product poly(arylene ether).