Preparation of Flame-Retardant Polyurethane and Its Applications in the Leather Industry

As a novel polymer, polyurethane (PU) has been widely applied in leather, synthetic and textiles due to its excellent overall performance. Nevertheless, conventional PU is flammable combustion accompanied by severe melting dripping, which then generates hazardous fumes gases. This defect limits applications various fields, including the leather industry. Hence, development of environmentally friendly, flame-retardant great significance both theoretically practically. Currently, phosphorus-nitrogen (P-N) reactive hot topic field PU. Based on this, preparation mechanism PU, as well current status industry were reviewed.