"The overall aim of this proposal is to create multinational partnership between European and South American research teams in order to exchange knowledge and experience concerning ""state of the-art"". Such solution will strengthen research cooperation and transfer ofknowledge between partners from Poland (Cracow University of Technology), Latvia (Latvian State Institute of Wood Chemistry), Spain (University of the Basque Country), Argentina (National University of Mar Del Plata) and Brazil (Paraíba Federal University). Participants have different expertise areas to share the experience of preparing of bio-based composites. It allow to develop modern bio-composites, for which there is a growing demand in both continents.Short and longer-term periods of staff exchange between participants allow to more rapid advances in carrying out of investigations, as well as advancing current knowledge in the form of joint-author high citation index papers.The project consists of four stages: synthesis of bio-based polyols, preparing natural fillers, producing bio-polyurethane matrix compositesreinforced natural fillers as well as tests and evaluation of final product. Each of partner brings added value to proposed stages and isneeded in the implementation of the overall project."