Development and optimization of fire-protective coating composition based on epoxypolymers

The object of research is intumescent fire retardant coatings based on epoxy resins. aimed at the development mathematical models dependence swelling rate their composition. Considering complexity processes during formation a protective carbon layer, it advisable to select optimal ratio components an coating experimentally, followed by construction dependences Therefore, experimental studies developing and optimizing composition polymers are important task. were carried out in accordance with theory planning experiments orthogonal compositional plan second order. A linear factor was chosen as response function. Compositions ED-20 oligomer, cured polyethylene polyamine filled ammonium polyphosphate, aluminum hydroxide, graphite additive used for study. Based results processing results, regression equation obtained surfaces constructed that describe coefficient Cs oligomer content hydroxide additive. complex relationship shown between different ratios components. optimum (Cs=68.1) polymer determined, amounting 20 wt. including 15 mass parts 3 However, such ratio, «self-extinguishing» condition not met (Cs=27 %). Filling polyphosphate amount 26.3 including, 25 3.5 additives allows get over 63 reduced level flammability (Ci=31 %)