Arlanxeo, a world-leading synthetic rubber company, recently launched its Keltan Ultra-High Mooney 100+ Innovation Platform. Based on the novel Keltan ACE catalyst technology and the excellent finishing process, this platform is primarily focused around the development of new grades with high Mooney viscosity, to optimize physical properties and cost, thus to satisfy the demand for the upgrade of applications across industries, including automotive, construction, and transportation.

Currently, markets are calling for better EPDM products. A major challenge in this has been finding the balance between improved physical properties and reasonable production costs. To satisfy the tight requirements from domestic clients, Keltan Ultra-High Mooney 100+ Innovation Platform has launched three new grades – Keltan 13561C, Keltan 10660C, and Keltan 10950C. Each of these grades has adopted Keltan Controlled Long Chain Branching (CLCB) technology, achieving good mechanical and processing performance. Meanwhile, this platform is about to launch a new Ultra-High Mooney oil-extended grade – Keltan 10675C (50 phr of extender oil).

Keltan 13561C has Mooney viscosity of 130MU at 125℃. Its ultra-high molecular weight enables higher mechanical property that is the same as or even higher than crystalline grades, but without issues of inferior low-temperature performance, high shrinkage, etc. Keltan 10660C reaches 100MU at 125 ℃ and possesses both ultra-high molecular weight and a combination of processing and mechanical properties. With this, Keltan 10660C can be applied to general mixing devices. Both grades are able to bring reduced costs through increasing compound loading without influencing the mechanical property. By virtue of the advantages of ultra-high Mooney, non-crystalline, fast vulcanization, higher elasticity and compound loading, Keltan 13561C and Keltan 10660C can adapt to strict standards of production and application and are widely applied to produce automotive seals and hoses, seals for construction, and rubber products for rail systems.

Sponge grade Keltan 10950C reaches Mooney viscosity of 100MU at 125 ℃. Due to the high Mooney viscosity, the grade also enables a reduced cost with increased compound loading while still maintaining the same mechanical property and compression set. Compared with the previous sponge grades, Keltan 10950C has a larger molecular weight, higher elasticity and non-vulcanized compound strength, and excellent extrusion performance, like outstanding flowability, better collapse resistance, and good profile appearance, offering an alternative for producing high-performance sponge seals. Major applications of the grade include auto sponge profiles, window sponge profiles, and insulation materials for construction.

 “Arlanxeo Keltan Ultra-High Mooney 100+ Innovation Platform is committed to fulfilling the customers’ demand for products with higher performance and lower cost. Facing the new challenges and opportunities ushered by the industrial upgrades, we will stay innovative, close to the local market, and customer-centric, and continually innovate to provide excellent products and services”, said Dr. Baojia Cheng, Head of TSAD and R&D, HPE Asia, ARLANXEO.

The three Keltan grades above are all produced by Arlanxeo Changzhou plant and are available in the market.

Kraton Corporation, a leading global producer of speciality polymers and high-value biobased products derived from by-products of pine wood pulping, has received an International Sustainability and Carbon Certification (ISCC) PLUS certification for its manufacturing facility in Niort, France.

Kraton can now supply 100 percent ISCC PLUS-certified AMS and AMS Phenolics resins using a mass balance attribution approach thanks to the certification. Kraton's dedication to promoting the biobased and circular economy is further demonstrated by the Niort facility's accreditation. Kraton is committed to lowering carbon emissions and accelerating the shift to a more sustainable future by empowering clients to include more environmentally friendly products into their supply chains.

An independent multi-stakeholder project, the International Sustainability and Carbon Certification (ISCC) is a leading certification method that guarantees accurate mass-balancing bookkeeping and reporting of renewable and recycled materials across the supply chain.

Lana Culbert, Kraton Pine Chemicals VP of Marketing, said, “Our SYLVARES™ and SYLVATRAXX™ brands feature a range of high-performance AMS and AMS Phenolics resins used in speciality adhesives and tyre applications. Our ISCC PLUS journey began in 2021 with the certification of our Sandarne, Sweden facility. Earning this certification for our Niort plant marks a significant milestone, further expanding our portfolio of sustainable solutions.”

Sumitomo Rubber Industries, Ltd. has said that it has clarified the process of rubber breakdown, a crucial element that affects tyre longevity, through joint research with Professor Gert Heinrich at Dresden University of Technology (Saxony State, Germany).

In a special session called ‘Combining Physics, Chemistry & Engineering of Rubber: A Symposium in Honor of Charles Goodyear Medalist Gert Heinrich’, which was held in honour of the Professor's medal-winning achievement, the findings were presented in an invited talk at the American Chemical Society, Rubber division, ACS 2025 Spring Technical Meeting held in Orlando, Florida, US, on 6 and 7 March. Professor Heinrich is a member of the Leibniz Institute of Polymer Research Dresden, which took part in the collaborative effort.

Tyre durability is determined by cracking processes, which result in the development of cracks and rips in a rubber substance. The endurance of rubber was previously mostly assessed using tearing tests, but there were still numerous unanswered concerns regarding the microscale structural alterations at the crack tip. This effort identified a factor that determines the start and propagation of cracks in rubber by analysing the force applied to a fracture tip using a simulation approach. In rubber, a crack tip undergoes dilatation deformation to create voids, or microvoids within the item. The fracture gets worse as the voids expand and come together. It was also discovered that the tension focused on the fracture tip is lessened when voids emerge.

The German Rubber Industry Association (Wdk) is advocating for a thorough and legally enforceable regulation of the end-of-waste status for Germany and the whole of Europe. The association is pusing for the circular economy to be strengthened for tyres.

Valuable secondary raw materials are still legally regarded as waste since there are no consistent standards for the end-of-waste status, according to Stephan Rau, Technical Director of the WDW. This restricts the market integration of sustainable recycled materials, impedes investments and creates legal uncertainties. “We call for a comprehensive and binding end-of-waste regulation for Germany and the whole of Europe to strengthen the recycling sector, facilitate investment in modern technologies, and sustainably reduce the CO₂ footprint of the rubber and tire industry,” he said.

In order to adhere to the prescribed waste hierarchy and stop illicit exports, Rau also emphasised that lawmakers must quantitatively and openly document waste tyre flows. He added that waste tyres should only be gathered by approved disposal companies and pre-sorted based on their intended use.

On the important role of mechanically recycled tyre granules and powder, Rau said, "This is an important secondary raw material that is already used in a variety of durable and safe products. A clearly defined end to its waste status must be made more economically viable. To ensure the market success of tyre granules, a risk-based approach to assessing chemical ingredients is essential. Binding limit values ​​must be assessed using a migration analysis, i.e. based on their bioavailability. Second, the use of tyre granule products must become mandatory in the construction industry and infrastructure projects. The goal is clear: Recycling must be economically viable."

Kuraray, a global speciality chemicals company and one of the largest suppliers of industrial polymers and synthetic microfibres, has received ISCC PLUS certification for its thermoplastic elastomers SEPTON and HYBRAR as well as Liquid Rubber produced at the Company’s Kashima Plant at Ibaraki Prefecture.

ISCC PLUS makes sure that certified products, such biomass and recycled raw materials, are appropriately handled throughout their supply chains, including the manufacturing process, by applying the mass-balance technique.

In the five years preceding up to its centenary in 2026, Kuraray is carrying out its medium-term management strategy, PASSION 2026. In order to achieve the long-term Kuraray Vision 2026 of being a speciality chemical company that grows sustainably by integrating new foundational platforms into its own technologies and contributing to customers, society and the planet, the company will keep growing its range of products that improve the natural and living environments.