EPDM – Ethylene Propylene Diene Monomer

Home » EPDM – Ethylene Propylene Diene Monomer

    Product name: EPDM (ethylene propylene diene monomer)

    Mark: LS-D40, LS-D45, LS-D50, LS-D90, LS-D80, LS-D800

    Application: 

    LS-D40 is used in the manufacture of flexible water pipes, sealing sheets, oil and petrol-resistant car hoses, medium voltage cables, molded products.

    LS-D45 is used in the manufacture of rubber insulation for wires and cables, heat-insulating hoses, molded rubber products, car tires, treadmills, transparent rubber products, multi-colored bicycle tires, and other colored rubber products.

    LS-D50 is used in the manufacture of mixtures. It has good extrusion properties. It is used in the production of wires and cables, electronic components, household appliance parts, automobile rubber parts, rubber sheets, rubber rings, and waterproof membranes.

    LS-D70 contains about 20% of industrial oil, thanks to which it can be used to make rubber compounds. In addition, it has good extrusion properties and is able to remain relatively soft at low temperatures. It is used in the production of car seals, door and window seals, container seals, rubber parts for cars, various rubber tubes, including rubber tubes that can withstand low temperatures; rubber products, bridge supports, bases under sleepers and other rubber products, rubber parts for household appliances, food, and pharmaceutical hermetic products.

    LS-D90 is used in the manufacture of car sponge seals. When combined with butadiene rubber it can be used to produce car tire sidewall, frost-resistant rubber, other sponge rubber products, and fast-curing products.

    LS-D80,800 – are used in the manufacture of automotive gaskets, rubber hoses, automobile cooling pipes, auto parts, shock-absorbing products, rolled waterproofing materials, container gaskets, door and window gaskets, coatings for playgrounds, shoe materials, and other rubber products.

    Ethylene propylene diene monomer rubber or EPDM is a synthetic rubber material. EPDM belongs to the M class of rubbers. This material is made from propylene, ethylene, and a diene comonomer, which allows the rubber to be vulcanized with sulfur. Ethylidene norbornene (ENB), vinyl norbornene (VNB), and dicyclopentadiene (DCPD) are usually used as diene comonomers in the production of EPDM.

    EPDM rubbers are versatile synthetic rubbers prepared from ethylene, propylene and a diene monomer. In contrast to natural rubber, EPDM rubbers do not contain unsaturation in their polymer backbones, giving them good resistance to ozone, oxygen, and heat. Their apolar character provides good resistance to water and polar solvents. These features have resulted in the widespread use of EPDM rubber in applications, such as automotive sealing systems, roof sheeting, (waste) water seals, and radiator hoses. EPDM is an extremely durable synthetic rubber roofing membrane  (ethylene propylene diene terpolymer) widely used in low-slope buildings in the United States and worldwide. Its two primary ingredients, ethylene and propylene, are derived from oil and natural gas. EPDM is available in both black and white, and is sold a broad variety of widths, ranging from 7.5 feet to fifty feet, and in two thicknesses, 45 and 60 mils. EPDM can be installed either fully adhered, mechanically attached or ballasted, with the seams of the roofing system sealed with liquid adhesives or specially formulated tape.

    EPR is widely used as an insulation material for electric cables due to its high dielectric strength. EPR rubber is noticeably softer than natural rubbers and Styrene-Butadiene rubbers so can be used as a replacement material in many applications. Where greater hardness is required, the EPR compound can be blended with polyethylene (PE) or polypropylene (PP) to achieve improved physical properties. Mechanical properties include resistance to compression, cutting, impact, tearing and abrasion.

    The manufacturing process of synthetic rubber starts with the manufacturing raw rubber. The first step in this process is polymerization. This is a chemical reaction in which small molecules (monomers) are joined together to form large molecules (polymers). Rubbers can be processed in many ways (e.g. by compression moulding, injection moulding and extrusion). During the process or after it the rubber is vulcanized (cross-linked), due to which rubber elasticity and dimensional stability appear. After processing and vulcanization the rubber product often has to be finished e.g. by cutting.

    Recycling waste rubber has gained importance in recent years. Ethylene-propylene-diene rubber (EPDM) is used to manufacture various automotive parts. Reclaiming EPDM rubber waste is a major problem. Waste powder from discarded EPDM automotive parts was devulcanized using an industrial autoclave which provided both heating and high pressure steam. To aid the devulcanization process, 2-mercaptobenzothiazoledisulfide (MBTS) and tetramethylthiuram disulfide (TMTD) devulcanizing agents, and aromatic and aliphatic oils were also used. A portion of the virgin EPDM rubber in a common formulation for the automotive rubber strips was replaced with the devulcanized product to produce blends, which were revulcanized using a semi-efficient (SEV) vulcanization system. The viscosity, cure and mechanical properties of the blends were subsequently determined.

    Properties of EPDM

    EPDM is a very durable and elastic material that can be molded into different shapes. The rubber also acts as a good insulator. This material also holds up well to heat, ozone, ultraviolet light, and other weather conditions, making products made from this rubber suitable for outdoor use. EPDM is often used to create seals, gaskets, membranes, diaphragms, tubes, O-rings, hoses, radiators, insulation for electrical wires, and other similar products. This material is also often used as a clean roofing material that doesn’t contaminate run-off water, allowing it to be harvested. 

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    ParameterLS-D40LS-D45LS-D50LS-D70LS-D90LS-D80LS-D800
    Volatility % ≤0.750.75≤0,75≤0,500.0250.750.50
    Ash Content % ≤0.10.1≤0,5≤0,070.030.10.07
    Ethylene Content wt% 5549-5555-6254,2-60,25565.5-71.565.5-71.5
    Vanadium Content mg/kg ≤1010≤6≤510105
    Mooney Viscosity ML (1+4) 125 ° C mm²/s 454540-5060-70657065-75
    Ethylidene norbornene content (ENB) %4.57.74-63,6-5,684.03.0-5.0
    Tensile strength MPa≥18.615≥13≥15151111.0
    Tensile stress at a given relative elongation of 300% MPa≥5.310≥8≥9,51077
    Elongation at fracture %492≥320≥350≥350320≥300≥300
    Paсkage25 kg polypropylene sack, 42 sacks in metal box (1050 kg)25 kg polypropylene sack, 42 sacks in metal box (1050 kg)25 kg polypropylene sack, 42 sacks in metal box (1050 kg)25kg polypropylene sack, 42 sacks in metal box (1050 kg)25kg polypropylene sack, 42 sacks in metal box (1050 kg)25kg polypropylene sack, 36 sacks in metal box (900 kg)25kg polypropylene sack, 36 sacks in metal box (900 kg)