Abstract
The implementation of a Circular Economy model, promoted by the increasingly stricter European policies, demands a comprehensive approach to resource efficiency. In this sense, polyurethanes, one of the most used polymers worldwide, are strongly dependent of non-renewable fossil resources. Thus, boosting the production of new polyurethanes / a new polyurethane based on more sustainable raw materials is crucial to move towards the footwear industry decarbonisation. INESCOP, aware of the footwear industry’s environmental impact, focuses on reducing or removing fossil-based raw materials and opts for eco-friendly ones. These sustainable raw materials provide polyurethane adhesives with additional beneficial non-toxicity and sustainable characteristics, without harming their properties during their useful life. Therefore, the aim of this study is to synthesise and characterise reactive hotmelt polyurethanes from biomass and CO2-based polyols as bioadhesives for the footwear industry. The influence of biobased polyols on the polyurethane structure, and therefore, on their final properties was analysed by different experimental techniques in order to assess their viability for the upper to sole bonding process.