Why are Bromobutyl Rubber Stoppers so popular?
Medicinal rubber stoppers can be divided into natural rubber stoppers and butyl rubber stoppers according to the rubber materials used. Natural rubber stoppers use natural rubber as the main component, which is easy to breed mold, has poor sealing performance, and is prone to chemical reactions with drugs. Butyl rubber stopper is mainly composed of halogenated butyl rubber, which has good air tightness, chemical stability and biological safety, and is currently the mainstream product in the field of medicinal rubber stoppers. The current domestic bromobutyl formula Generally, sulfur is used for vulcanization, which has high efficiency and low cost. However, the activity of chlorinated butyl group is relatively low, the choice of vulcanization system is slightly limited, and the production process and technical requirements are relatively strict, and the difficulty is relatively large. In the early days, phenolic resin, stearic acid and zinc oxide were commonly used as vulcanization sys