Vulcanization of rubber with sulphur using a polyether and at least one conventional accelerator in a concentration below the usual range, i.e. below a value of 1,3% by weight, calculated on the rubber.
Particularly suitable are block polyethers from ethylene oxide and a 1,2-alkylene oxide having 12 to 20 carbon atoms. Further, it is of advantage to have the polyether and the usual accelerator together with other vulcanizing agents added to the rubber in accordance with the master batch procedure. These steps lead to a considerable reduction in the endan- germent of health that may be due to the usual accelerators, but have no detrimental effect on vulcanization.
使用聚醚和至少一种常规
促进剂对橡胶进行
硫磺硫化,其浓度应低于通常范围,即低于橡胶重量的 1.3%。
特别适用的是由
环氧乙烷和具有 12 至 20 个碳原子的 1,2-环氧烷组成的嵌段聚醚。此外,将聚醚和常用的
促进剂以及其他
硫化剂按照母料程序添加到橡胶中也很有好处。这些步骤大大降低了通常的
促进剂可能造成的健康问题,但对
硫化没有不利影响。