In a significant development for environmental science and the rubber industry, Perpetuus Advanced Materials has announced a viable solution for eliminating 6PPD-quinone, a highly toxic byproduct of 6PPD, a chemical commonly used in tyres and synthetic rubbers. This breakthrough is particularly urgent given the established link between 6PPD-quinone and acute mortality in coho salmon, a crisis identified in 2020 that has since spurred global regulatory concern. The company’s innovation provides both a direct manufacturing replacement and a method for environmental remediation.

The core of the solution is an amine functionalised graphene masterbatch, engineered using the company's proprietary plasma-functionalised graphene nanoplatelets. This advanced material operates through a novel mechanism where the amine groups act as radical scavengers, effectively stabilising the rubber and rendering the use of 6PPD entirely obsolete. By preventing the formation of the toxic 6PPD-quinone at its source, this technology addresses the root cause of the pollution. The masterbatches are supplied as pre-mixed sheets or blocks, allowing for straightforward integration into existing manufacturing processes for tyres and a wide array of other synthetic rubber products, including hoses, seals and industrial belts, without requiring any operational changes.

To tackle the existing environmental contamination, Perpetuus has concurrently developed a suite of modular filtration systems designed for stormwater management. These units, which include drain cartridges and bioreactor modules, utilise graphene nanoplatelets to capture pollutants. They are enhanced by a proprietary artificial intelligence platform that provides real-time monitoring of filter saturation and pollutant levels, offering a critical tool for protecting vulnerable waterways and urban runoff zones during the transition to reformed tyres.

Produced on a continuous plasma platform ensuring consistent quality, the masterbatch not only replaces 6PPD but also consolidates numerous other mix ingredients and additives, thereby simplifying production and improving workplace air quality. With over 10 years of specialisation in graphene-enhanced elastomers, Perpetuus is now actively pursuing regulatory approvals and industrial partnerships to accelerate the widespread adoption of this comprehensive environmental solution.

John Buckland, CEO, Perpetuus, said, “This is no longer about mitigation. We’ve replaced 6PPD. Our amine functionalised GNPs deliver the same anti-degradant function as 6PPD but with zero toxic quinone by-products. This isn’t theory. It works in formulation and scales now. This isn't a patch; it’s a permanent replacement. By removing 6PPD at the source, we remove the risk of 6PPD-Q entirely. The science is proven. The solution is scalable. The environmental need is urgent. The only question left is whether regulators and manufacturers are ready to act. This is the moment to eliminate 6PPD for good and replace it with something better.”

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Cabot Corporation said it has received improved environmental ratings from CDP, reflecting continued progress in water management and steady performance on climate disclosures.

In CDP’s 2025 assessment, the company was awarded an A- rating for Water Security, up from a B in 2024, and a B rating for Climate Change, unchanged from the previous year. Cabot said the water score exceeded both global and industry averages, recognising its approach to managing water-related risks and implementing sustainable water practices.

The Climate Change rating remained stable year on year, with improvements reported in areas including climate risk disclosure, value chain engagement and industry collaboration.

The latest scores extend a five-year pattern of incremental improvement, achieved amid more demanding reporting standards and rising expectations from regulators, investors and customers.

“We are proud that CDP’s independent assessment reflects our ongoing efforts to enhance environmental performance and transparency,” said Jennifer Chittick, senior vice-president for Safety, Health and Environment and chief sustainability officer. “The improvement in our Water Security score demonstrates our leadership in this critical area, and we remain committed to advancing our sustainability strategy across all domains. This progress was made possible by our dedicated, global team, and we remain focused on driving further improvements in the years ahead.”

CDP assesses companies on environmental impact across climate change, water security and deforestation, using a scale from D for Disclosure to A for Leadership. In 2025, more than 24,800 companies were rated, representing about two-thirds of global market capitalisation.

Cabot said the results underline its focus on transparency and responsible environmental management as it continues to execute its sustainability strategy.

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A USD 1.4 million equipment enhancement at Liberty Tire Recycling’s Cameron, North Carolina, facility is set to significantly boost its processing capabilities. This upgrade, enabled by the state’s sustainable financial backing of its scrap tyre programme, will allow the facility to handle an extra 3,300 tonnes of material annually, representing nearly 300,000 passenger tyres.

A key improvement is the increased capacity to process truck tyres, which are more challenging to recycle due to their size and durable steel components. The resulting crumb rubber, highly sought after by manufacturers, will be directed towards producing floor mat bases and rubber tiles made entirely from recycled material. This material also serves as a component for athletic tracks, synthetic turf, rubberised asphalt and various moulded products.

This capital investment follows North Carolina’s legislative action to redirect tyre disposal fees into the state’s scrap tyre management system, a move that includes compensating counties for collection and recycling expenses. With North Carolina establishing itself as a centre for tyre recycling, Liberty Tire indicates it is evaluating further multi-million-dollar investments and job creation across its other operations in the state.

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WACKER has earned a distinguished ‘A’ rating in the 2025 CDP sustainability assessment for its climate protection management. This is Wacker’s third time in a row on the A list by the global environmental non-profit organisation. Beyond the climate category, WACKER maintained its strong standing in water security, again achieving an A- leadership rating. In the forests category, the company secured a B management-level score. These consistent results highlight WACKER’s ongoing commitment to holistic environmental responsibility and transparent reporting across all key sustainability areas.

The CDP, a globally respected non-profit formerly known as the Carbon Disclosure Project, conducts the world’s premier environmental disclosure system. It annually evaluates thousands of organisations on behalf of investors, using a detailed questionnaire that spans climate change, water security and forests. Scores follow an A-to-F scale, with an A denoting exemplary performance and disclosure.

Among over 22,100 companies evaluated worldwide, WACKER’s top climate score places it in the premier tier. According to CDP, such a rating reflects comprehensive, high-quality data disclosure and robust transformation strategies.

Peter Gigler, Head of ESG at WACKER, said, “We have our sustainability performance independently audited by CDP every year, so we’re very pleased that we were able to maintain our top rating for the third time in a row.”

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Midas, Asia’s largest manufacturer of tyre retreading materials, has launched O-rings designed for off-the-road (OTR) tyres, aimed at delivering reliable sealing performance in demanding operating conditions.

The O-rings are manufactured using high-quality natural rubber and are formulated to improve physical properties and ensure dimensional stability. According to the company, the product has been tested over many years in harsh environments and is intended to provide consistent, trouble-free performance in OTR tyre applications.

Midas said only REACH-compliant raw materials are used in the manufacture of the O-rings, underscoring its adherence to safety, quality and international regulatory standards.

Founded 56 years ago, Midas supplies tyre retreading materials to customers in more than 60 countries. The company said the launch reflects its continued focus on developing performance-oriented solutions for the global tyre and retreading industry.

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