A wholly aromatic polyester which is essentially free of charred material, has good color and good thermal stability, comprises recurring units derived from the reaction of:
a. an aromatic dicarboxylic acid component;
b. a hydroxy aromatic carboxylic acid component; and
c. an aromatic dihydroxy component;
wherein from about 0 to about 100 ppm magnesium is used as the reaction catalyst and from 0 to about 0.1 percent, by weight, based on the weight of the polyester, of a phosphite is used as a stabilizer; and
wherein the monomers used to prepare the wholly aromatic polyester have a total ash content of no more than 50 ppm and a total potassium content of no more than 20 ppm.
一种全芳香族聚酯,基本上不含烧焦物质,具有良好的色泽和热稳定性,由以下反应生成的递归单元组成:
a. 芳香族二
羧酸组分
b. 一种羟基芳香族
羧酸组分;和
c. 一种芳香族二羟基成分;
其中约 0 至约 100ppm 的
镁用作反应催化剂,0 至约 0.1%(按聚酯重量计)的
亚磷酸酯用作稳定剂;以及
其中用于制备全芳香族聚酯的单体的总灰分含量不超过 50 ppm,总
钾含量不超过 20 ppm。