Butyl rubber (IIR) is one of the most reliable airtight synthetic rubbers in the global industrial market, made from approximately 98% isobutylene and 2% isoprene, with gas permeability about 8–10 times lower than natural rubber, making it widely used in tire inner liners, pharmaceutical stoppers, sealing systems, and industrial waterproofing materials.
The unique molecular structure of butyl rubber gives it outstanding air retention, chemical stability, and weather resistance. Compared with conventional rubber materials, butyl rubber shows significantly lower air transmission rates and stronger resistance to ozone, heat, and aging, allowing long-term use in demanding automotive, construction, and industrial sealing environments. Its airtight performance and vibration damping properties also make it suitable for shock absorption and noise reduction applications.
Industrial production of butyl rubber mainly adopts low-temperature cationic polymerization technology using isobutylene and isoprene as core raw materials. Traditional slurry polymerization is typically carried out at around -100°C using chloromethane as a diluent and aluminum chloride catalyst system to ensure stable molecular structure and controlled polymerization. Compared with conventional synthetic rubber production, butyl rubber manufacturing requires stricter temperature control and higher process precision, which directly affects product quality and sealing performance.
As a professional rubber raw material manufacturer, Tianjin Gnee Biotech Co., Ltd. supplies butyl rubber (IIR) materials for tire manufacturers, sealing product factories, and industrial rubber processors across Europe, South America, Southeast Asia, India, Pakistan, and the Middle East. The company provides stable bulk supply, multiple product grades, and customized sourcing solutions for global industrial procurement needs.
