申请人:E.I. DU PONT DE NEMOURS AND COMPANY
公开号:EP0150617A2
公开(公告)日:1985-08-07
The -CF2OR groups in a starting copolymer comprising random-CX2CX2 units and
units, where the four X's are four fluorines or three fluorines and one chlorine, n is 0 or 1 and R is CH3 or C2H5, are converted into-COZ groups, where Z is F or OR' and R' is CH3 or C2H5, by treatment with a strong acid at a temperature of at least 50 °C but below the decomposition temperature of the reactants and product. The product copolymer can be hydrolyzed to give copolymers having carboxylic groups which are useful, e.g. in the form of a permionic membrane, for separating the compartments of a chloralkali cell.
由无规-CX2CX2 单元和-CF2OR 单元组成的起始共聚物中的-CF2OR 基团
单元(其中 4 个 X 为 4 个氟或 3 个氟和 1 个氯、n 为 0 或 1、R 为 CH3 或 C2H5)中的-CF2OR 基团通过强酸处理转化为-COZ 基团(其中 Z 为 F 或 OR'、R'为 CH3 或 C2H5),处理温度至少为 50℃,但低于反应物和产物的分解温度。产物共聚物经水解后可得到具有羧基的共聚物,这种共聚物可用作氯碱池的隔室,例如以过离子膜的形式。