A cross-linked foam produced by two-stage vulcanization and foaming of a rubber compound comprising (A) a chlorinated ethylene-α-olefin copolymer rubber having a chlorine content of 20-40 wt. % and a Mooney viscosity (ML₁₋₄ at 121 °C) of 10-190, (B) a triazinethiol as a vulcanizer, (C) an alkylammonium halide as a vulcanization accelerator, and (D) a hydrazide blowing agent in such a manner that the vulcanization temperature and time in the first stage are 120-140 °C and 5-10 minutes, respectively, while those in the second stage are 125-160 °C (at least 5 °C higher than that in the first stage) and 5-20 minutes, respectively, and that the expansion ratio is 3-10. The obtained foam can be colored brilliantly, is excellent in weather resistance, flexibility and shape retention, has a good appearance, and is most suitable for wet suits and the like.
一种通过橡胶复合物的两阶段
硫化和发泡产生的交联泡沫,该橡胶复合物包括 (A)
氯化
乙烯-α-烯烃共聚橡胶,其
氯含量为 20-40 wt.(B) 作为
硫化剂的三嗪
硫醇,(C) 作为
硫化
促进剂的卤化烷基
铵,以及 (D) 一种酰
肼发泡剂、第一阶段的
硫化温度和时间分别为 120-140 °C 和 5-10 分钟,第二阶段的
硫化温度和时间分别为 125-160 °C (比第一阶段的温度和时间至少高 5 °C)和 5-20 分钟,膨胀比为 3-10。得到的泡沫颜色鲜艳,耐候性、柔韧性和保形性极佳,外观漂亮,最适合用于制作潜
水服等。