Disclosed is a polyester carbonate containing imido groups comprising recurring units represented by the following formula:
and recurring units represented by the following formula: (̵ O-Ar-O-CO )̵ (2) wherein Ar represents a divalent aromatic hydrocarbon group selected from the group consisting of
with a mole fraction of the recurring units shown by the formula (I) being 0.2 to 0.8, and having a reduced viscosity [η sp/C] of 0.3 dl/g or-more at 60 °C in a solution in which the polyester carbonate is dissolved in p-chlorophenol as a solvent at a concentration of 0.2 g/dl.
Further disclosed is a process for producing the same which comprises allowing 4-carboxy-N-(3-hydroxyphenyl)-phthalimide to react with a divalent phenol represented by the following formula:
HO-Ar-OH (3) wherein Ar has the same meaning as above,
and diphenyl carbonate.
The comound of this invention or the compound prepared according to the process of this invention has a higher mechanical strength, good moldability, solvent resistance and liquid crystal characteristic
本发明公开了一种含有亚
氨基基团的
碳酸聚酯,该亚
氨基基团包含下式所代表的递归单元:
和下式所代表的递归单元:(̵ O-Ar-O-CO )̵ (2) 其中 Ar 代表二价
芳香烃基团,该
芳香烃基团选自由下列组成的组
式(I)所示重复单元的摩尔分数为 0.2 至 0.8,且在 60 °C 时,
碳酸聚酯溶于
对氯苯酚作为溶剂的溶液中的降低粘度[η sp/C]为 0.3 dl/g 或以上,浓度为 0.2 g/dl。
进一步公开的是生产
碳酸聚酯的工艺,包括使 4-羧基-N-(3-羟基苯基)-邻苯二甲
酰亚胺与下式所代表的二价
酚反应:
HO-Ar-OH (3) 其中 Ar 的含义同上、
和
碳酸二苯酯反应。
本发明的化合物或根据本发明工艺制备的化合物具有较高的机械强度、良好的成型性、 耐溶剂性和液晶特性。