A REVIEW ON NEW METHODS OF POLYURETHANE MANUFACTURING PRIMARILY USING INDUSTRIAL WASTES

Abstract: In a world where polymers are widely in demand and used in numerously, PU has its own vital role to play. They are used for making foaming materials, mattresses, paints, adhesives, flooring materials etc. in this paper, we investigate the various methods of utilizing the industrial wastes which is otherwise dumped off or has other adverse environment effects. Here, especially TDI (toluene di-isocyanate) tar from TDI manufacturing companies and PET (polyethylene terephthalate) waste are discussed. Effective methods to produce Polyurethane solely using TDI tar and also TDI tar and polyol recovered from PET wastes are included. Process like glycolysis, transesterification, etc. are included. Since the conventional PU , TDI , Polyol being very costly , This recycling and recovery processes are sure to bring down the cost and is an applaud able solution for solid waste management

Keywords: TDI-tar, Polyol, waste Recovery, Glycolysis, trans-esterification, reactivity, applications