How To Distinguish between Fireproof Coating And Flame Retardant Coating

How To Distinguish between Fireproof Coating And Flame Retardant Coating

In the field of architectural coatings, fire-resistant coatings and flame retardant coatings have attracted a lot of attention because of their special functionality. Although both have the ability to enhance the fire resistance of materials, there are obvious differences in their composition and mechanism of action.

Fireproof coatings are mainly composed of base materials, pigments, fillers and additives, and their core lies in the selection of fireproofing additives. Non-intumescent fireproof coatings (foaming type) contain phosphorus, halogens and other elements of flame retardants, such as decabromodiphenyl ether, sodium borate and antimony trioxide. Antimony trioxide, in particular, can significantly enhance the flame retardant effect under specific conditions (e.g., when used in conjunction with chlorinated paraffin). In addition, the choice of base material is also critical, containing chlorine or bromine elements of the base material, such as vinyl chloride or vinylidene chloride copolymer emulsion, can significantly enhance the fire performance.

Intumescent fire retardant coatings, on the other hand, stop flame propagation by forming an insulating spongy foam layer under the action of the flame, and their fire protection additives mainly include carbon sources, foaming agents and organic nitrogen compounds.

Unlike fireproof coatings, fire retardant coatings have more diverse components, including base material, dispersion medium, fire retardant, additives, fillers and solvents. The base material is the main material for film formation, including inorganic binder (e.g., silicate, phosphate) and organic binder (e.g., organic synthetic resin). 

Flame retardant is the key component, commonly used flame retardants at home and abroad are ammonium polyphosphate, organic halogenated phosphate, ammonium phosphate and ammonium metaphosphate. Although the amount of additives is small, it can significantly improve the flexibility, elasticity and other properties of the coating. Fillers not only enhance the decorative properties, but also enhance the mechanical and physical properties and chemical properties of coatings. Rutile titanium dioxide is a high-quality white filler commonly used in coatings. The solvent helps the dispersion and construction of each component, and water and organic solvents are commonly used.

To summarize, although both fire protection coatings and flame retardant coatings are designed to enhance the fire resistance of materials, they have their own compositional choices and mechanisms of action. Understanding these differences will help us to choose and apply these special function coatings in a more rational way.

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