Combustion is a rapid and intense oxidation reaction with flames. The reaction is very complex. The combustion must be produced and carried out in three conditions at the same time, ie, combustible materials, combustion aids, and ignition sources. In order to prevent the progress of the combustion, it is necessary to cut off any of the three elements in the combustion process, such as lowering the temperature, insulating the air, or combustibles.
Fire-retardant paint is based on the combustion of this basis, for the flammable substrate surface, reduce the flammability of the surface of the material being coated, block the rapid spread of the fire, protect the substrate from direct contact with the air and delay the ignition time and the burning speed of the object. , Or decomposition of non-combustible inert gas, dilute the flammable gas of the object to be protected by thermal decomposition, so that it is flame-retardant or non-combustible, is a special coating to improve the fire-resistant limit of the material being coated.
The fire protection mechanism of fireproof coatings can be roughly classified into the following five points:
(1) Fire-retardant coatings are inherently flame-retardant or non-flammable, so that the substrate to be protected is not in direct contact with air, delaying the ignition of objects and reducing the rate of burning.
(2) In addition to being flame-retardant or non-flammable, the fire retardant coating has a low thermal conductivity and can delay the transfer of the flame temperature to the protected substrate.
(3) The fireproof coating is decomposed by heat to generate a non-combustible inert gas, which dilutes the flammable gas that is thermally decomposed by the protected object, making it difficult to burn or slow down the burning speed.
(4) Nitrogen-containing flame retardant coatings decompose to NO, NH3, etc., and combine with organic free radicals to interrupt the chain reaction and lower the temperature.
(5) Intumescent fire-retardant coatings are thermally expanded and foamed to form a carbon-foam insulation layer that closes the protected object, delays the transfer of heat and the substrate, and prevents the object from burning or the decrease in strength caused by the temperature rise.
In addition, fire-retardant coatings also have rust-proof, water-repellent, anti-corrosion, abrasion-resistant, heat-resistant, and coating toughness, colorability, adhesion, easy drying, and a certain degree of gloss and other performance characteristics. According to their use areas can be divided into: decorative fire-retardant coatings, wood fire-retardant coatings, steel fire-retardant coatings, fire-retardant concrete structure coatings, fire-retardant tunnel coatings, fire-retardant cable coatings.
Fire-retardant paint is based on the combustion of this basis, for the flammable substrate surface, reduce the flammability of the surface of the material being coated, block the rapid spread of the fire, protect the substrate from direct contact with the air and delay the ignition time and the burning speed of the object. , Or decomposition of non-combustible inert gas, dilute the flammable gas of the object to be protected by thermal decomposition, so that it is flame-retardant or non-combustible, is a special coating to improve the fire-resistant limit of the material being coated.
The fire protection mechanism of fireproof coatings can be roughly classified into the following five points:
(1) Fire-retardant coatings are inherently flame-retardant or non-flammable, so that the substrate to be protected is not in direct contact with air, delaying the ignition of objects and reducing the rate of burning.
(2) In addition to being flame-retardant or non-flammable, the fire retardant coating has a low thermal conductivity and can delay the transfer of the flame temperature to the protected substrate.
(3) The fireproof coating is decomposed by heat to generate a non-combustible inert gas, which dilutes the flammable gas that is thermally decomposed by the protected object, making it difficult to burn or slow down the burning speed.
(4) Nitrogen-containing flame retardant coatings decompose to NO, NH3, etc., and combine with organic free radicals to interrupt the chain reaction and lower the temperature.
(5) Intumescent fire-retardant coatings are thermally expanded and foamed to form a carbon-foam insulation layer that closes the protected object, delays the transfer of heat and the substrate, and prevents the object from burning or the decrease in strength caused by the temperature rise.
In addition, fire-retardant coatings also have rust-proof, water-repellent, anti-corrosion, abrasion-resistant, heat-resistant, and coating toughness, colorability, adhesion, easy drying, and a certain degree of gloss and other performance characteristics. According to their use areas can be divided into: decorative fire-retardant coatings, wood fire-retardant coatings, steel fire-retardant coatings, fire-retardant concrete structure coatings, fire-retardant tunnel coatings, fire-retardant cable coatings.
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