A recent study by the Karlsruher Institute of Technology published explores the use of sunflower oil-based tricarboxylic acids to synthesise renewable thermosets. The authors utilised a newly developed route to synthesise these acids from high oleic sunflower oil, followed by cross-linking via the Passerini three-component reaction. The researchers also repolymerised a recovered compound into a polyurethane, highlighting the possibility of a second life cycle for these bio-based materials. The ability to recycle and reuse components within the polymers showcases the potential for bio-based thermosets in a circular economy. The development of sustainable thermosets derived from sunflower oil is a promising step towards reducing reliance on petrochemical resources, offering environmentally friendly alternatives in the coatings and polymer industries.