Common knowledge of coating: flame retardant mechanism of intumescent fire retardant coating for steel like structure

It is suggested that the flame retardancy of the intumescent fire retardant coating is the result of the organic coordination of the chemical reactions among the components The flame retardant and heat insulation principle is mainly realized by the following ways: (1) The dehydrated catalyst and ammonium polyphosphate are heated to decompose into acid; (2) Polyhydroxy carbonizers such as pentaerythritol are dehydrated and decomposed into carbon under high temperature and acid catalysis; (3) The polymer base material is melted by heat and expanded under the action of foaming agent such as melamine to further form the expanded carbonized layer Fire protection of expansion steel like structure Shenyang steel structure fireproof coating construction expert punde Building Fire Engineering Co., Ltd Recommended introduction: since its establishment, Shenyang punde Construction Fire Engineering Co., Ltd has cultivated a group of professional construction teams with excellent equipment, rich experience and serious responsibility with advanced and scientific management methods and strict engineering quality assurance and after-sales service system It has undertaken a number of fire system installation projects, which has been praised by customers Every idea and special requirement of you will be fully considered by us and fully realized in the construction technology, which will become the cornerstone of our successful long-term development We are looking forward to your invitation, to provide you with quality services and high-quality technical support! All construction coatings have passed ISO9001 Home of coatings: the flame retardant effect of the intumescent fire retardant coating for steel like structure is the common result of organic coordination of chemical reactions among various components The principle of flame-retardant and heat insulation is mainly realized by the following ways: (1) dehydration to carbon catalyst and heat decomposition of ammonium polyphosphate to generate acid; (2) dehydration and decomposition of polyhydroxy carbonization agent such as pentaerythritol to carbon under high temperature and acid catalysis; (3) heating melting of polymer base material and expansion foaming under the action of foaming agent such as melamine to further form expansion carbonization layer Under the condition of heating, the thickness of the intumescent fire retardant coating for steel like structure rapidly expands to dozens of times of the original thickness, up to 200 times The fire protection effect of the honeycomb or sponge like carbon layer on steel can be summarized into three aspects: (1) The high expansion carbonization layer can effectively reduce the surface temperature of the steel structure and prolong the supporting time of the steel structure in the fire; (2) Heat absorption, the physical changes of the carbonized layer after softening, melting and expansion of the polymer coating, as well as the thermal decomposition, evaporation and carbonization of each component of the coating will absorb a lot of heat So as to effectively reduce the surface temperature of the steel structure; (3) stop the combustion, all kinds of non combustible gases decomposed by the heating of each component of the coating can play a role in diluting the oxygen concentration, and can capture the free radicals generated by the combustion, so as to effectively prevent the combustion The coordination of these three processes makes the intumescent steel structure fireproof coating have an effective fireproof effect Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,