Solving a Long-Standing End of Life Challenge
Sulfone polymers such as Udel® PSU, Radel® PPSU and Veradel® PESU are critical materials in modern industry. They are widely used in surgical instruments, sterilisation trays, water filtration membranes, aircraft interiors and high-performance electronics.
Their strength, thermal stability and chemical resistance make them indispensable. Yet these same properties have historically prevented effective recycling at end of life. Once used, the materials were typically disposed of, contributing to waste and adding to the carbon footprint of high value applications.
For sectors such as healthcare and water treatment, where material integrity is non negotiable, this represented a significant circularity gap.
Reinventing Recycling Through Depolymerisation
Syensqo has developed a proprietary chemical recycling technology that changes this equation. The process depolymerises sulfone polymers back into their purified monomers. These monomers can then be repolymerised into new material without loss of performance.
This approach enables what the company describes as infinite recycling. The polymer can be returned to its original building blocks and reintroduced into production repeatedly, preserving both quality and functionality.
Unlike conventional mechanical recycling, the process restores material at molecular level, making it suitable for demanding applications.
From Production Scrap to Post Consumer Waste
The technology applies to both post industrial waste generated during manufacturing and post consumer waste collected after use. This dual capability strengthens its industrial relevance and scalability.
Recovered feedstock can be reused in the production of sulfone polymers or incorporated into other high-performance thermoplastics and epoxy resins. The flexibility of application extends its value beyond a single product stream.
A First for Sulfone Chemistry
Announced in October 2025, the breakthrough represents the first chemical recycling route of its kind for sulfone polymers. It builds on more than sixty years of expertise in sulfone chemistry and materials engineering.
By enabling closed loop systems for PSU, PPSU and PESU, Syensqo has addressed one of the most technically complex challenges in specialty polymers.
Supporting Net Zero in Critical Sectors
The implications extend well beyond materials science. In healthcare, circular sulfone polymers can reduce the environmental footprint of reusable medical devices while maintaining strict safety standards. In water filtration, they support clean water systems with lower embedded carbon. In aerospace and electronics, they preserve high performance characteristics while improving resource efficiency.
This innovation strengthens Europe’s position in sustainable specialty polymers and directly supports net zero and circular economy objectives.
Our new circular PAES technology shows that even the most advanced polymers can become part of a true circular economy.
Floryan De Campo, VP Life Solutions at Syensqo