| abstract |
Invention relating to 'PROCESS FOR POLYURETHANE RECYCLING' based on the capacity of polyurethanes to lower their resistance to shearing and hydrolysis by absorption of solvents. The shearing equipment considered as suitable for this process are, in particular, ball mills, sphere mills, plate mills, hammer and that equipment which enable material flowing through slots, holes, screens, sintering microporous plates, such as injectors, pumps and extruding machines, under pressure. The hydrolyzing agent added to the polyurethane shearing or comminuting processes comprise, acid solutions and, alkalis solutions. The process of this invention allows the obtention of polyurethane powder, or else, regenerated polyurethane under mild conditions that will enable a new integration to the basic formulation while ensuring a minimum loss in the product original characteristics. |