Polyisobutylene (PIB) is a non-toxic, inert, and linear saturated polyolefin polymer synthesized from isobutylene monomer via cationic polymerization. It is characterized by excellent chemical stability, good flexibility, high viscosity-temperature resistance, and strong adhesion. Available in forms ranging from low-viscosity liquids to high-molecular-weight solids, PIB is insoluble in water and most polar solvents but compatible with oils, greases, and non-polar hydrocarbons. Its key properties—such as impermeability to gases, resistance to oxidation and aging, and low glass transition temperature—make it versatile across industrial and consumer sectors.

Core Application Scenarios

Petrochemical & Lubricant Industry: Used as a viscosity index improver and pour point depressant in engine oils, gear oils, and hydraulic fluids to enhance lubricant performance under extreme temperatures. Also serves as a sealant and corrosion inhibitor in oil pipelines and fuel systems.

Rubber & Tire Industry: Functions as a processing aid and tackifier in rubber formulations (e.g., natural rubber, synthetic rubber) to improve adhesion between rubber compounds and reinforce tire sidewalls, hoses, and seals.

Adhesives & Sealants: A key component in hot-melt adhesives, pressure-sensitive adhesives, and industrial sealants for packaging, construction, and automotive applications, providing strong bonding and moisture resistance.

Consumer & Daily Chemicals: Added to chewing gum base as an elastomer to improve texture and elasticity. Used in cosmetics and personal care products (e.g., lip balms, moisturizers) for its emollient and protective properties.

Other Industrial Fields: Acts as a gas barrier in food packaging films to extend shelf life. Employed in electrical insulation materials for cables and wires due to its dielectric properties. Also used in pharmaceutical formulations as a binder or controlled-release agent.