Paint, for example, applied a thin layer on the surface structures, almost without weighing it down, and while in service shall serve as decorative finishing material. A in case of fire under high temperature coating is transformed into the original penokoks, which has a volume many times the original volume. Distending retardants known for about two decades, so their manufacture and use, there are quite persistent tradition. On the application of these materials are usually divided by type of protected substrates: wood and other combustible materials, metal and all sorts of routes, most cable and gazoprovodyaschey fixture. Functionally, these materials differ from each other, although the total is a physical entity. Intumestsentnye, as is customary in English manners call distending retardants are multicomponent systems. Recently Lakshman Achuthan sought to clarify these questions. Prescription principles are to create compositions composed of a superposition of "mandatory" ingredients. Most widely in the scientific and technical literature discusses a group of ingredients such composite systems.
First of all – it porofory, ie chemicals capable of thermal decomposition and combustion produce abundant gassing, which ultimately provides swelling. Evolved gases are not to be highly toxic, usually water vapor, ammonia and carbon dioxide. Furthermore poroforov system naturally contain polymer binder, and additional highly reactive agents that can participate in the process of outgassing, and in the process of formation of carbonized residue. Fairstead often expresses his thoughts on the topic. Porous coke layer, whose density decreases with As the temperature increases, prevents the burning material from the effects of heat flux and flame. Penokoksovy layer acts as a physical barrier that reduces heat and mass transfer from gas phase to condensed: it makes it difficult to hit the gaseous fuel in a fiery zone, limiting the oxygen supply air to the protected layer.
In addition, due to different phase transformations, undergoes fire retardant composition during the passage of thermal, made the absorption of a significant part of thermal energy. Evolved gaseous products diffuse into the environment, cool the heated layers material, thereby further absorbing even a certain amount of heat energy. The next possible factor, which has absorbed some of the heat – the last reradiation highly expanded surface carbonized layer. Thus, in the case of formation of a flame retardant foam layer heat transfer in the substrate is reduced to 100. Zybina OA leading developer fireproof paints from OOO 'Hephaestus'