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Bio-based Polyurethane-coatings – balancing sustainability and performance
The automotive industry is pushing for more sustainable solutions — including in polyurethanes. Bio-based raw materials are gaining attention, but how can sustainability be combined with the high technical demands of the sector? European Coatings editor Bettina Hoffmann spoke with Emeline Pedoni, Mäder Group about how her team is developing hybrid PU formulations that combine performance and sustainability — and why this path still poses major challenges.
How does the trend towards bio-based coatings influence PU development?
Emeline Pedoni: The rise of bio-based coatings is transforming the development of polyurethanes (PU), particularly in the automotive industry, which is seeking sustainable solutions. Manufacturers are increasingly incorporating environmental criteria into their choices.
Their CSR strategy is driving them to adopt materials that reduce the carbon footprint throughout the entire vehicle life cycle. Bio-based PUs, derived from vegetable oils or biomass, may therefore be preferred due to their lower dependence on fossil resources.
Our research is therefore focused on hybrid formulations that combine performance and sustainability. However, these materials remain more expensive and must meet the sector’s high technical requirements. Despite these challenges, their adoption is progressing, driven by innovations and the carbon neutrality objectives of corporations.
Do you see any gaps in PU products and how are you addressing them?
Pedoni: Polyurethanes (PU) have been used for decades for their excellent mechanical, chemical, and aesthetic properties. However, growing health and environmental concerns are calling into question the use of isocyanates in their composition.
The chemical industry must therefore innovate to offer safer alternatives without compromising performance: durability, flexibility, and adhesion beyond aesthetic appearance. Non-isocyanate polyurethanes (NIPUs), derived from alternative chemical reactions, offer a promising solution. The integration of bio-based materials also makes it possible to move towards a more sustainable and carbon-free chemistry. Mäder Group is making this innovation a priority by developing isocyanate-free formulations that meet current technical, regulatory, and environmental requirements.
