STUDY ON THE EFFECT OF INORGANIC ADDITIVES ON THE FLAME-RETARDANT PERFORMANCE OF PAINT

Abstract

Currently, organic flame-retardant coating systems have been widely used due to their effective thermal insulation properties. However, during combustion, these coatings can release toxic gases such as carbon monoxide and phosgene, posing serious risks to human health and the environment. Moreover, to date, no inorganic intumescent coating system on the market utilizes nanographite, a material with significant potential for enhancing thermal resistance and structural stability at elevated temperatures. In this study, nanographite, Al(OH)₃, KH₂PO₄, urea, and CaCO₃ were used as inorganic additives, investigated, and tested at various ratios to evaluate their flame-retardant properties in paint formulations. The aim was to develop an inorganic flame-retardant paint system that eliminates toxic gas emissions during fires. Experimental results indicate that in a 20 mL inorganic paint system formulation containing 1.0 g of nanographite, 0.5 g of CaCO₃, 0.1 g of KH₂PO₄, and 0.3 g of Al(OH)₃, the flame-retardant performance of the paint was significantly enhanced, reducing heat transfer and providing better protection for internal structures. Specifically, the fire resistance time exceeded 23 minutes at temperatures approaching 900°C, offering excellent thermal insulation and material protection.