Chlorinated butyl rubber is prepared by introducing chlorine gas into butyl rubber solution. Chlorination occurs in the isoprene part, and most of it is a substitution reaction of chlorine. The double bonds of butyl rubber are basically completely preserved. Substantially one chlorine atom may be substituted for each isoprene double bond unit. So how much do you know about its properties? The editor of chlorobutyl rubber stopper will take you to a brief understanding.
1. Heat resistance
Chlorobutyl rubber has good heat resistance and relatively low degradation at high temperature for a long time. The performance of long-term aging at 121 °C is obviously better than that of natural rubber. The heat resistance of chlorobutyl rubber is not only related to the polymer itself, but also to the vulcanization system and reinforcement system.
2. Flexibility
Chlorinated butyl rubber is an important rubber variety for the manufacture of tires and shock absorption products, and its flexural resistance is very important. Chlorobutyl rubber has excellent heat resistance, and the vulcanizate has a tight structure, so it has good flex resistance. On the other hand, chlorobutyl rubber has a large hysteresis loss, and when used under dynamic conditions, the heat generation is also large, which will reduce its flexural resistance.
3. Weather resistance
The weather resistance of chlorobutyl rubber vulcanizates is closely related to fillers. Carbon black is an excellent UV-resistant compounding agent. The chlorobutyl rubber vulcanizate reinforced with carbon black has good weather resistance. Light-colored vulcanizates have poor weather resistance.
The above is the chlorobutyl rubber stopper editor: a brief introduction to the knowledge about the product characteristics of chlorobutyl rubber.