Evaluation of the fire-retardant properties of an intumescent organic binder composite material for shielding electromagnetic fields

Abstract

This paper investigates the fire properties of a liquid organic component of an intumescent type of material for protection from electromagnetic fields. The flammability group of the organic component of the protective composition was determined depending on the thickness of the film. It is shown that an increase in the film thickness from 1 mm and more even after 16 cycles of accelerated tests provides the first group of flammability. It was found that with a coating thickness of 1 mm, the temperature of the flue gases slightly exceeds the critical value (260 °С) in the range of 86-106 sec and 255-266 sec, the weight loss is 5.2%, which makes it possible to classify the organic component of the protective material as a flame retardant and non-flammable. The paper presents complete data on the fire dependence of the considered water-dispersive binder with a complex of coke-forming agents. It was found that an organic binder of the intumescent type with a film thickness of 1 mm, regardless of the test conditions, is characterized by the first group of flammability.