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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The Association of Natural Rubber Producing Countries (ANRPC) recently participated in a Hari Raya Open House event. The gathering was organised by Malaysia’s Rubber Development Division, which falls under the Ministry of Plantation and Commodities. This occasion allowed the ANRPC to connect with important figures within the natural rubber sector. By bringing together various industry partners, the open house successfully created an atmosphere of goodwill and strengthened existing relationships.

The ANRPC has conveyed its genuine gratitude to the event’s hosts for their warm reception and thoughtful organisation. The association acknowledged the importance of uniting stakeholders in such a meaningful celebration, which helps reinforce shared goals and collaborative spirit across the sector.

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ARLANXEO has officially opened its Innovation Center Asia (ICA) in Changzhou, China, transforming the former Regional Technical Center into a full-fledged Asian innovation hub. This upgrade significantly strengthens the company’s global research and development network, with a clear focus on serving the local Chinese market as well as broader regional needs. The expansion reflects ARLANXEO’s commitment to advancing performance elastomers through targeted regional investment.

Now boasting larger facilities, an expanded team and new laboratory equipment, the Innovation Center Asia is equipped to handle rubber compounding, processing, physical testing, chemical analysis, battery prototyping and more. A dedicated chemistry lab has been added to support the nearby HNBR plant and global HNBR research activities. Located alongside ARLANXEO’s EPDM and HNBR plants in Changzhou, the centre fosters close customer collaboration to address evolving market needs. It also works in tandem with the company’s Dormagen, Germany, innovation centre, jointly developing new testing methods, exploring advanced technologies and delivering innovative product solutions worldwide.

The inauguration event featured speeches from Herman Dikland, ARLANXEO’s Chief Technology and Sustainability Officer, and Hong Sun, Managing Director of ARLANXEO China. Joining them at the ceremony were company representatives, key customers, local government officials and academic partners from various universities. Their presence underscored the collaborative spirit and shared interest in driving innovation forward.

Herman Dikland, Chief Technology and Sustainability Officer, ARLANXEO, said, “Innovation is a core driver of ARLANXEO’s sustainable growth, and China plays an important role in our global innovation ecosystem. This state-of-the-art laboratory facility puts us in an excellent position to advance our R&D capabilities and reinforce our market position. We look forward to driving frontier innovation together with our passionate and creative China team while bringing China-based innovation into solutions for global markets.”

Hong Sun, Managing Director, ARLANXEO China, said, “The inauguration of the Innovation Center Asia reflects our commitment to supporting the rapid transformation of China’s rubber industry during the 15th Five-Year Plan period. With growing demand for advanced materials and customised formulations, the new centre will further strengthen our proximity to customers, enhance our agility in meeting market needs and better support the upgrading of the entire rubber industry.”

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ARLANXEO has strengthened its role in the synthetic rubber industry by expanding its marketing and sales agreement for EPDM rubber produced by Rabigh Refining & Petrochemical Company (PRC), a joint stock company formed under the laws of the Kingdom of Saudi Arabia. This new arrangement became effective in February 2026, granting ARLANXEO exclusive rights to market all EPDM grades coming from PRC’s facilities, which will continue to be sold under the Keltan KSA product name.

This extension of the Keltan KSA business highlights ARLANXEO’s dedicated commitment to the worldwide EPDM market. By combining the original Keltan line with the Keltan KSA portfolio, the company now offers customers a uniquely broad and comprehensive range of EPDM solutions, ensuring a more complete service across diverse applications.

John Sawaya, Chief Business Officer, ARLANXEO, said, “Through this expanded agreement, we are further enhancing ARLANXEO’s position as the global supplier for EPDM synthetic rubber.”

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Himadri Speciality Chemical Ltd. has been named ‘India’s Leading ESG Entity’ by Dun & Bradstreet in its report, ‘ESG Horizons: Now and Next 2026’. The honour acknowledges how deeply the company has woven environmental, social and governance considerations into its main business approach. By focusing on clean technologies and building out the lithium-ion battery value chain, Himadri proves that responsible manufacturing and sustainable expansion go hand in hand.

Dun & Bradstreet arrived at this decision using its own ESG Intelligence Framework Rating, which looked closely at the company’s performance during FY25 across key environmental, social and governance indicators. Winning this distinction shows how consistently Himadri works to generate lasting value for everyone connected to the business while keeping industrial practices responsible. Anurag Choudhary, CMD and CEO, Himadri Speciality Chemical, has explained that ESG thinking drives their innovation efforts from the ground up. Through breakthroughs in advanced materials and battery technology, the firm actively pushes forward the global movement towards a cleaner economy.

Several real-world achievements back up Himadri’s reputation for sustainability leadership. All eight of its manufacturing sites operate on a zero-liquid discharge basis. The company generates enough clean power internally to cover 100 percent of its electrical energy needs. Beyond environmental measures, Himadri has also built a strong global presence, supplying specialised chemical solutions to clients spread across 56 different countries.

A business model rooted heavily in research and development along with circular use of resources allows Himadri to keep sustainability at the centre of its growth story. By integrating these principles rather than treating them as an afterthought, the company ensures its long-term impact on both industry and the environment remains positive.

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