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    • 10. 发明授权
    • Continuous process for the preparation of bromochlorinated butyl rubber
    • 连续制备溴代丁基橡胶的方法
    • US4254240A
    • 1981-03-03
    • US74156
    • 1979-09-10
    • Neil F. NewmanRobert RoperRoger K. West
    • Neil F. NewmanRobert RoperRoger K. West
    • C08F8/00C08F8/20C08F8/22
    • C08F8/20
    • A solution of butyl rubber in an inert solution such as n-hexane is halogenated in a continuous process using bromine chloride vapor and high intensity mixing means for both the halogenation and subsequent neutralization steps. Adjustment of the mole ratio of bromine chloride to isoprene, where an isobutylene-isoprene butyl copolymer is used, to less than about 1.5 to 1 prevents overhalogenation and significant molecular weight loss, while the use of bromine chloride vapor results in improved process safety.The doubly halogenated product, containing both bromine and chlorine in its structure can be vulcanized in the absence of sulfur, e.g., with zinc oxide. It is particularly useful in rubber compositions where the singly halogenated product is employed, but demonstrates product performance advantages compared to both brominated butyl rubber and chlorinated butyl rubber.
    • 丁基橡胶在惰性溶液如正己烷中的溶液在连续方法中被卤化,使用溴氯化物蒸气和用于卤化和随后的中和步骤的高强度混合装置。 使用异丁烯 - 异戊二烯丁基共聚物的氯化异丁烯与异戊二烯的摩尔比(其中使用异丁烯 - 异戊二烯丁基共聚物)的调节小于约1.5比1可以防止过度卤化和显着的分子量损失,而溴氯化物蒸汽的使用导致改进的工艺安全性。 在其结构中含有溴和氯的双卤代产物可以在不存在硫的情况下硫化,例如用氧化锌。 在使用单卤代产物的橡胶组合物中特别有用,但与溴化丁基橡胶和氯化丁基橡胶相比,它们具有优异的产品性能。