High Quality Iir Butyl Rubber Gasket

Since the industrial production of butyl rubber, the raw material route, production process and the structure of polymerization kettle have not changed much. Generally, methyl chloride is used as diluent and aluminum trichloride is used as catalyst. The monomer conversion can be adjusted by controlling the amount of these two. The polymerization of butyl rubber is carried out by positive ion reaction. The reaction temperature is low, the reaction speed is fast, the exothermic heat is concentrated, and the molecular weight of the polymer decreases sharply with the increase of temperature. Therefore, it is the main problem in production to rapidly discharge the polymerization heat to control the reaction at a constant low temperature.

Butyl rubber (IIR) is the fourth largest synthetic rubber (SR) rubber in the world. It is the product of cationic polymerization of isobutene and isoprene under the action of Friedel-Craft catalyst. It is white or light yellow crystal in appearance, odorless and tasteless, has a low glass transition temperature, and is insoluble in ethanol and acetone. Butyl rubber is widely used in inner tubes, water tubes, vulcanized capsules, airtight layers, sidewalls, wires and cables, waterproof building materials, damping materials, pharmaceutical bottle stoppers, food (gum base material), rubber dams, anti-poison appliances, adhesives, inner tube valve cores, anti-corrosion products In terms of wharf ship protection, bridge support pad and heat-resistant transport belt.