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CR (Neoprene)

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  • CR (Neoprene)
    • Excellent UV and ozone resistance for CR (Neoprene) rubber

    What is the CR (Neoprene) Rubber ?

    CR Rubber, known as Chloroprene Rubber, is a synthetic rubber made by the polymerization of Chloroprene monomer. The chemical structure of Chloroprene is 2-chloro-1,3-butadiene (-CH2-CCl=CCH-CH2-).

    Chemical structure and synthesis

    Monomer: The main monomer of CR rubber is chloroprene.

    Polymerization method: CR rubber is usually synthesized by emulsion polymerization or solution polymerization. Emulsion polymerization is the most commonly used method because it can be carried out at lower temperatures and fine, uniform rubber emulsions can be obtained.

    Polymerization initiators: Commonly used polymerization initiators include potassium persulfate (KPS), ammonium persulfate (APS), etc.

    Our CBD Seals CR (Neoprene) Compounds information：

    Weather resistance: CR rubber has excellent UV and ozone resistance, suitable for outdoor use.

    Oil and chemical resistance: CR rubber has good resistance to petroleum-based oils, lubricants and most chemicals.

    Heat and Cold Resistance: CR rubber has good performance in the temperature range of -30°C to 120°C.

    Flame retardancy: CR rubber is self-extinguishing and not easily combustible, making it suitable for applications requiring flame retardant properties.

    Mechanical properties: CR rubber has good tensile strength, tear strength and abrasion resistance.

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

    Processing and vulcanization

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

    Vulcanization: Vulcanization of CR rubber usually uses metal oxides (e.g. zinc oxide, magnesium oxide) and accelerators (e.g. tetramethylthiuram disulfide) as vulcanizing agents. During the vulcanization process, the metal oxides react with the chlorine atoms in the neoprene rubber to form a cross-linked structure.

    Areas of application

    Automotive industry: for the manufacture of oil-resistant, weather-resistant seals, hoses, belts, etc.

    Construction industry: used to manufacture weather-resistant, flame-retardant seals, waterproof materials, etc.

    Wire and cable: used to manufacture oil-resistant and weather-resistant wire and cable sheathing.

    Industrial: used to manufacture chemical and oil resistant seals, gaskets, etc.

    Aerospace: Used to manufacture weather-resistant and flame-retardant aerospace seals.

    Sustainability

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

    CR rubber excels in a wide range of industrial applications due to its excellent weathering, oil resistance, flame retardancy, heat resistance and mechanical properties.

    CR rubber outperforms fluoroelastomer in terms of cost-effectiveness and flame retardancy, but is inferior to fluoroelastomer in terms of chemical resistance, heat resistance and certain mechanical properties.

    CR rubber outperforms NBR in weathering and flame resistance, but is inferior in cost, heat resistance and certain mechanical properties.