To provide a highly heat resistant flame retardant.
A polymer having repeating units represented by the following formula (1), which has a weight average molecular weight as calculated as standard polystyrene of at least 6,000:
wherein R is a C1-6 alkylene group, -S- or -SO2-.
提供一种高耐热阻燃剂。
一种聚合物,其重复单元由下式(1)表示,按标准聚
苯乙烯计算,其重量平均分子量至少为 6000:
其中 R 是 C1-6 烷基、-S- 或-SO2-。