Dow continues to invest in chemical depolymerization as the only closed-loop recycling technology for end-of-life polyurethane. Combined with parallel investments by Covestro in chemolysis and smart pyrolysis, the industry is moving from pilot to commercial-scale chemical recycling — though feedstock collection remains the primary bottleneck.
Closed-loop recycling for polyurethane is structurally hard because PU is a thermoset — once cured, it cannot be melt-processed back into pellet form like a thermoplastic. Mechanical recycling routes are limited to rebonded foam (carpet underlay, packaging cushion). Depolymerisation breaks the cured polymer chain back to monomers or oligomers that can re-enter the chemistry; chemolysis (typically glycolysis) and smart pyrolysis are the dominant chemical-recycling tracks.
The "pilot to commercial" transition cited is the consequential signal. Dow, Covestro and others have been operating depolymerisation pilots for years; the move to commercial scale changes the economics of recycled-attributed PU and makes recycled-content claims in finished systems materially more credible.
The bottleneck the industry keeps coming back to is feedstock collection. Mattresses, automotive seat foam, refrigerator foams, panel cores at end-of-life — the collection, sorting and separation infrastructure for durable-goods PU waste is still patchy in most geographies. Closing the loop is partly a chemistry problem and partly an end-of-life logistics problem.