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Butyl

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  • Butyl
    • Excellent airtightness and weather resistance for Butyl rubber
    What is the Butyl Rubber ?

    Butyl rubber, known as Isobutylene-Isoprene Rubber (IIR), is a synthetic rubber made from the copolymerization of isobutylene (Isobutylene) and a small amount of isoprene.

    Chemical structure and synthesis

    Monomer: The main monomers of Butyl rubber are isobutylene (-CH2-C(CH3)2-) and isoprene (-CH2-C(CH3)=CH-CH2-).

    Polymerization method: Butyl rubber is usually synthesized by low-temperature solution polymerization, which is carried out at a low temperature of about -100°C to ensure the activity of the isoprene monomer.

    Isoprene content: The isoprene content is usually between 1% and 3%, which determines the degree of unsaturation and the vulcanization properties of the rubber.

    Our CBD Seals Butyl Compounds information：

    Air tightness: Butyl rubber has excellent air tightness, the best of all commercially available rubbers, making it suitable for use in inner tubes and sealing materials.

    Ageing resistance: Butyl rubber has good resistance to oxidation and ozone, making it suitable for outdoor use.

    Heat and cold resistance: Butyl rubber has good performance in the temperature range of -50°C to 120°C.

    Electrical insulation: Butyl rubber has good electrical insulation properties and is suitable for seals in the electrical and electronics industries.

    Chemical resistance: Butyl rubber has good resistance to most chemicals, but poor resistance to some polar solvents (e.g. ketones, esters).

    Processing and vulcanization

    Processing: Butyl rubber can be processed by traditional rubber processing methods such as extrusion, calendering, injection molding, and molding.

    Vulcanization: Vulcanization of Butyl rubber usually uses sulfur or resin as vulcanizing agent, because Butyl rubber has low unsaturation and needs to be vulcanized to form cross-linked structure.

    Areas of application

    Tire industry: Used in the manufacture of inner tubes, innerliners for tubeless tires, tire sealing rubber strips, etc.

    Seals: used to manufacture aging-resistant and airtight seals, such as door and window seals, automotive seals, etc.

    Medical and food industry: for the manufacture of chemical resistant and airtight medical and food packaging materials.

    Aerospace: for the manufacture of aging-resistant and air-tight aerospace seals.

    Sustainability

    Recycling: Butyl rubber can be recycled and reused to reduce the impact on the environment. Some advanced recycling technologies can convert waste Butyl rubber into new rubber products or other useful materials.

    Butyl rubber excels in sealing and moisture-proofing applications with its superior airtightness, weatherability, chemical resistance, electrical insulation and low permeability.