Sustainable water-borne paints: Architectural bio-based PU paint for PUR windows

 
With climate change accelerating every year, sustainable building products are being researched to replace fossil-based materials by environmentally friendly alternatives. A pivotal focus is the paradigm shift towards low-emission coatings, which indicate a significant reduction in the use of organic solvents and their variable volatility. This transformative trend is poised to notably boost the demand for waterborne coatings in residential and commercial applications, particularly in interior and exterior paints. Identifying a significant gap in the market for waterborne polyurethane sprayable decorative paints, our research addresses this void by formulating a waterborne and bio-based PU paint for bio-polyurethane window frames. Outdoor resistance, high opacity, adhesion and high wet scrub resistance are some of the critical requirements that have also been accomplish, this study not only advances the understanding of sustainable building design but also provides practical insights for informed decisions on environmentally friendly coating materials, that are seamlessly aligned with current European directives. In line with the objectives of the EASIZER0 project (www.easizero.eu), our goals are to achieve a superior finish using bio-based ingredients, and to develope a mono-material polyurethane final product that facilitates efficient recycling at the end of the window frames life cycle.