Ethylene propylene copolymer (EPM), or a terpolymer with a diene (EPDM), is a type of synthetic rubber, which is characterised by a wide range of applications. The ‘E’ letter refers to ethylene, ‘P’ to propylene and ‘D’ to diene and ‘M’ refers to a kind of monomer with respect to its classification in ASTM standard D-1418. The M class includes rubbers having a saturated chain of the polymethylene type.

EPDM rubber, therefore, is a terpolymer of ethylene,propylene and a diene-component and the Dienes currently used in the manufacture of EPDM rubbers are dicyclopentadiene (DCPD), ethylidene norbornene (ENB) and vinyl norbornene (VNB). Hexadiene (HD) is rarely being used in making EPDM these days.

The ethylene and propylene monomers combine to form a chemically saturated, stable polymer backbone providing excellent heat, oxidation, ozone and weather aging. A third, nonconjugated diene monomer is terpolymerized in a controlled manner to maintain a saturated backbone and place the reactive unsaturation in a side chain available for vulcanization or polymer modification chemistry.

The two most widely used diene termonomers are primarily ethylidene norbornene (ENB) followed by dicyclopentadiene (DCPD).Each diene incorporates with a different tendency for introducing long chain branching or polymer side chains that influence processing and rates of vulcanization by sulfur or peroxide cures. Generally, ENB type is better heat resistant than DCPD type. Peroxide cure EPDM, boosted with coagents provide better heat resistant than sulphur/accelerator cured EPDM.

This polymer is the most water resistant rubber available, and this resistance is maintained to high temperatures (up to 180°C in steam with peroxide cured compound). The highest temperature resistance is achieved by using peroxide cured grades. It is thus used extensively under water cables (sea water as well). Before EPDM, Chloprene rubber (CR) was extensively used wherever weather resistance properties were important. Upon discovery of EPDM in 1963 , it quickly took over existing weather resistant market of Chloroprene rubber (CR).

Ethylene-propylene-diene rubber (EPDM) is one of the most widely used and highly-developing synthetic rubbers. EPDM business will reach US 6.9 b $ by end 1Q,2020. Currently, their total capacity is about 1.65m ton/ Yr. and it takes the third place in the world synthetic rubber consumption after styrene-butadiene and butadiene rubber. As of August 2019, there are 15 big companies in the world that produce EPDM.

In order to present a competitive landscape of the global EPDM market, key market players are witnessed as LANXESS AG (Germany), ExxonMobil Chemical (U.S.), Dow Elastomer (U.S.), Mitsui Chemical (Japan), Kumho Polychem (South Korea), Lion Copolymer (U.S.), Versalis (Italy), JSR Corporation (Japan), Jilin Chemical (China), SK Global Chemical (Japan), Nizhnekamsk Neftekhim Inc (Russia), and Sumitomo Chemical Company Ltd (Japan) have been profiled. With a huge number of EPDM manufacturers worldwide and with a number of different grades by each of these manufacturers, EPDM is one of the versatile elastomer in India now . EPDM has different grades in the industry based on :

• Mooney viscosity
• Type of diene content
• Percentage mole of diene content and
• Ethylene propylene ratio
• Bimodal Type

With current increase in EPDM uses , India now badly need EPDM manufacturing plant to protect its foreign currency. Another important application India need is compulsory application of EPDM based Roofing in rainy states to protect against damage of multistory buildings (Mumbai). EPDM has been used as a covering to waterproof roofing in western countries, Japan, China, Taiwan and countries in South East Asia. Major applications of EPDM are :

• Other than automobile glass-run channels, EPDM is also used in radiators, garden and appliance hose, tubing, pond liners, washers, belts, electrical insulation, vibrators, O-rings, solar panel heat collectors and speaker cone surrounds.
• It is also used as a medium for water resistance in electrical cable-jointing, geomembranes, rubber mechanical goods, plastic impact modification, thermoplastic etc.
• EPDM is used as blends in Butyl rubber for Inner-tube application.
• EPDM is used in PC side wall , black or white. Extensively used in color BC tyres for children.
• EPDM roofing is very popular in developed countries.
• With EPDM Roofing membranes rainwater harvesting is also very popular. EPDM roofing does not pollute the run-off rainwater.

Rubber roofing has the benefit that it does not pollute the runoff rain water. Water could be used for personal sanitation / gardenining / hygiene. White oil may be the best processing oil. They are manufactured in the form of calendared sheet and covered with a plastic such that its application on floor is easy upon removal of plastic and then they are applied in roof floor. EPDM rubber sheet 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. EPDM Waterproof Roofing system has delivered more than six decades of commercial roofing success by building upon a heritage of innovation in rubber polymer technology.

Dr Samir Majumdar, Rubber Consultant (India & Asia pacific), has served in leading tyre companies like JK Tyre, Kyoto Japan Tire, among others. He was technical and R&D head (Asia Pacific) in ExxonMobil. He has authored several research papers and technical books. smajumdar501234@yahoo.co.in

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Zeon Corporation has finalised the construction of a new bench-scale facility at its Tokuyama Plant in Shunan City, Yamaguchi Prefecture, dedicated to advancing the efficient production of butadiene from sustainable ethanol sources. The project, which broke ground in July 2025, represents a strategic move to establish a naphtha-independent raw material supply chain, thereby bolstering both corporate sustainability and the broader transition towards a carbon-neutral society. The facility is slated to commence full-scale operations in January 2027, with the ultimate goal of achieving commercial viability by 2034.

A commemorative ceremony took place at the plant site on 31 July 2026, drawing a total of 46 attendees. The gathering included official representatives from Japan’s Ministry of Economy, Trade and Industry (METI), the New Energy and Industrial Technology Development Organization (NEDO) and local governmental bodies from Yamaguchi Prefecture and Shunan City. Also present were delegates from the Yokohama Rubber Company, the construction contractor and various affiliated firms, alongside Zeon’s leadership, including Akira Honma, the Corporate Officer and Tokuyama Plant Manager.

This initiative forms one half of a dual-themed research and development programme undertaken in partnership with Yokohama Rubber, under the auspices of NEDO’s Green Innovation Fund. The collaborative effort is focused on the social implementation of technologies for synthesising both butadiene and isoprene from renewable biological materials by the 2030s. As part of this process, Zeon is set to produce a prototype polybutadiene rubber using the output from the new bench-scale facility, while Yokohama Rubber will subsequently manufacture test tyres from this material and conduct performance evaluations on test tracks.

Both companies have outlined a clear roadmap, intending to finalise the core technology for societal deployment by 2030 through the operation of a larger pilot plant, with full-scale commercialisation targeted for 2034. The bench-scale facility is a critical precursor in this phased approach, providing essential data for the scale-up process.

The broader project encompasses two selected NEDO themes, both subsidised through the Green Innovation Fund. The first involves the highly efficient synthesis of butadiene from ethanol, with technical cooperation from the National Institute of Advanced Industrial Science and Technology. The second focuses on biotechnological pathways to directly produce butadiene and isoprene from plant-based materials, involving partnerships with the Institute of Science Tokyo and RIKEN. Both tracks aim to supplement synthetic rubber feedstocks and support closed-loop recycling, aligning with Japan’s 2050 net-zero emissions goal by fostering long-term industrial innovation.

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The Association of Natural Rubber Producing Countries (ANRPC) has released its Monthly Natural Rubber Statistical Report for June 2026, a month defined by price resilience amid conflicting market forces. The provisional reopening of the Strait of Hormuz triggered a sharp 20.29 percent drop in Brent crude oil prices to USD 85.40 per barrel. However, this bearish signal was counterbalanced by persistent supply constraints from El Niño-related weather disruptions across major producing regions.

Physical rubber prices posted broad-based gains across most grades. SMR-20 rose 1.39 percent to USD 2.32 per kilogramme, while STR-20 gained 2.61 percent to USD 2.55 per kilogramme. RSS-3 and RSS-4 advanced 4.98 percent and 5.88 percent to USD 3.09 and USD 2.84 per kilogramme, respectively, though latex eased 1.44 percent to USD 1.94 per kilogramme. On the trade front, China's imports surged 7.14 percent month-on-month, while India and Viet Nam declined. Export growth was recorded for Cambodia, Viet Nam and Indonesia, though Thai shipments contracted.

Global production for 2026 is projected at 15.310 million tonnes, up 2.3 percent from 2025, driven by gains in Thailand, China, India and Malaysia. However, June output fell 3.7 percent year-on-year to 1.207 million tonnes due to seasonal wintering and El Niño-related weather disruptions. Malaysia, Indonesia and Cambodia have introduced new incentive and governance measures to strengthen their sectors. Global consumption is forecast to grow 0.7 percent to 15.411 million tonnes in 2026, with June consumption rising 3.3 percent to 1.300 million tonnes, led by China and India amid steady tyre and EV-related demand.

Currency markets saw the Malaysian ringgit trade between RM3.96 and RM4.08 against the US dollar, while the Thai baht ranged from 32.56 to 33.24. In futures trading, the SHFE September 2026 contract averaged 17,580.68 CNY per tonne, down 0.45 percent month-on-month, while the SGX September contract averaged USD 2.24 per kilogramme, up 1.75 percent, with both reflecting tightening supply and firm downstream demand.

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Pyrum Innovations AG has finalised long-term supply and offtake agreements with Pirelli, reinforcing the tyre manufacturer’s European Tyre-to-Tyre initiative. The deal secures Pirelli’s purchase of Pyrum’s ThermoTireBlack (TTB) for use in its European production facilities, while Pirelli will provide Pyrum with end-of-life tyres from designated German sources.

These contracts simultaneously bolster Pyrum’s feedstock security and guarantee an industrial outlet for its recycled materials, covering both raw material procurement and product commercialisation. Through its proprietary thermolysis process, Pyrum transforms scrap tyres into ThermoTireBlack, which can substitute fossil-based carbon black, and ThermoTireOil (TTO), destined for chemical industry use. The partnership offers further validation of Pyrum’s technology within a certified European value chain involving tyre, chemical and synthetic-rubber leaders.

Pyrum also supports the broader Tyre-to-Tyre project, initiated by Pirelli with BASF and Synthos, which reintroduces secondary materials from used tyres and production waste into new tyre manufacturing via an ISCC PLUS-certified, traceable system.

Pascal Klein, CEO, Pyrum Innovations AG, said, “Signing these long-term agreements with Pirelli is an important commercial and strategic milestone for Pyrum. The coöperation secures both the supply of end-of-life tyres and an industrial outlet for our TTB. It confirms that our technology and products meet the requirements of one of the world’s leading tyre manufacturers and can contribute to the establishment of scalable circular value chains in Europe.”

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MICHELIN ResiCare, a specialist in renewable and high-performance chemical solutions, has entered into a distribution partnership with IMCD Europe, a major international distributor of speciality chemicals. The agreement centres on the European supply of 5-hydroxymethylfurfural (5-HMF), a bio-sourced compound produced at the company's Isère-based industrial facility in Péage-de-Roussillon.

Under the new arrangement, IMCD Europe will handle distribution across the continent while MICHELIN ResiCare maintains direct engagement with its key strategic accounts. The collaboration aims to significantly widen the molecule's availability to European manufacturers through an optimised logistics framework and localised technical support, thereby addressing rapidly growing demand within the materials and formulation chemical sectors.

The French production site, scheduled to begin operations in early 2027, will have an initial annual capacity of 3,000 metric tonnes. This domestic manufacturing capability represents a critical step in securing European access to a molecule deemed strategically important for the region's chemical industry, reducing reliance on external supply sources.

IMCD will contribute its technical expertise, market knowledge and pan-European distribution network to facilitate the integration of 5-HMF into new applications. The company's established footprint in polymers, advanced materials and speciality formulations positions it to provide developmental support to manufacturers exploring alternatives to fossil-derived intermediates. MICHELIN ResiCare has already spent two years assisting major industry players with application evaluations, and the partnership is expected to expand these efforts across a broader customer base.

Derived from fructose through non-toxic green chemistry and already REACH-registered, 5-HMF serves as a versatile building block for low-environmental-impact resins and can replace conventional petroleum-based ingredients across diverse industries including agriculture, cosmetics, construction, transport, aeronautics and electronics. The collaboration reinforces MICHELIN ResiCare's commitment to renewable resources and sustainable material development while aligning with IMCD's dedication to advancing innovation in greener chemistry solutions.

Laurent Lemonnier, CEO, MICHELIN ResiCare, said, “This partnership with IMCD represents a major step forward in our desire to popularise the use of 5-HMF and to support the transition to a more responsible chemistry. With its technical expertise, its capacity to support customers and its European location, IMCD is the perfect partner to speed up the distribution of this molecule of the future.”

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