IIR (Butyl Rubber)

Butyl rubber (IIR) is a synthetic rubber material known for its excellent chemical and thermal stability. It is usually prepared by anionic polymerization of isobutene and a small amount of isoprene. The main component of butyl rubber is poly (1-hexene), which has a saturated molecular structure, which allows it to maintain good elastic properties at high temperatures and has strong resistance to oxidation, ozone, and other chemical degradation factors. One of the most prominent features of butyl rubber is its excellent airtightness, especially its ability to penetrate small molecules such as water vapor and oxygen. This characteristic makes butyl rubber very popular in sealing applications, such as inner tubes of automotive tires, valve seals for gas cylinders, and various scenarios that require gas leakage prevention. In addition, due to its oil and solvent resistance, butyl rubber is also widely used in the manufacturing of sealing gaskets for petrochemical equipment. However, butyl rubber also has some limitations. For example, its tear resistance is relatively low and its flexibility is poor at low temperatures. Therefore, in practical applications, butyl rubber is often blended with other types of rubber or reinforced with reinforcing agents to improve these properties. Butyl rubber, with its unique performance combination, has become one of the indispensable materials in many key industrial fields. With the continuous advancement of technology, we may see more innovative butyl rubber products emerging in the future to meet the growing market demand.