Marin Boyadzhiev, Ph.D enterpreneur, freelancer and consultant in the IV industrial revolution and owner of Greendigitalplastics an unique recycable to sustainable path. What will happen with the nature if we do not digitalize within the tempo of change? Is it that possible only on SUSTAINABLE path? Do you know how to create and construct the stairs small steps on this path? PET/PA based polyesterpolyol chemical and technological mathematical model to achieve emission-product-energy relationship. Poylesterpoylol Recycling product through technology and synthesis for PU, PIR and TPU. How to define circular chemical content in POLYOL-POLYURETHANE relationship?