This invention is concerned with a process for the chlorination of crosslinked polystyrene and soluble uncrosslinked polystyrene resins containing segmers of methylstyrene or ethylstyrene, said process comprising:
1) dissolving or suspending a polymer that contains segmers of methylstyrene or ethylstyrene in an appropriate organic solvent;
2) contacting the dissolved or swollen polymer with an aqueous solution of an alkaline metal hypohalite, said solution having a pH of at least 7.0 but not more than 10;
3) in the presence of a phase transfer catalyst;
4) at a temperature from 0° to 100°C; and
5) isolating the chloromethylated polystyrene.
本发明涉及交联聚
苯乙烯和含有
甲基苯乙烯或乙基
苯乙烯析出物的可溶性非交联聚
苯乙烯树脂的
氯化工艺,所述工艺包括
1) 将含有
甲基苯乙烯或乙基
苯乙烯半聚合物的聚合物溶解或悬浮在适当的有机溶剂中;
2) 将溶解或溶胀的聚合物与碱性
金属次卤化物的
水溶液接触,所述溶液的 pH 值至少为 7.0,但不超过 10;
3) 加入相转移催化剂
4) 温度为 0° 至 100°C;以及
5) 分离出
氯甲基化聚
苯乙烯。